ImageInputStreamImpl (Java Platform SE 6) (original) (raw)

javax.imageio.stream

Class ImageInputStreamImpl

java.lang.Object extended by javax.imageio.stream.ImageInputStreamImpl

All Implemented Interfaces:

DataInput, ImageInputStream

Direct Known Subclasses:

FileCacheImageInputStream, FileImageInputStream, ImageOutputStreamImpl, MemoryCacheImageInputStream

public abstract class ImageInputStreamImpl

extends Object

implements ImageInputStream

An abstract class implementing the ImageInputStream interface. This class is designed to reduce the number of methods that must be implemented by subclasses.

In particular, this class handles most or all of the details of byte order interpretation, buffering, mark/reset, discarding, closing, and disposing.

Field Summary
protected int bitOffset The current bit offset within the stream.
protected ByteOrder byteOrder The byte order of the stream as an instance of the enumeration class java.nio.ByteOrder, whereByteOrder.BIG_ENDIAN indicates network byte order and ByteOrder.LITTLE_ENDIAN indicates the reverse order.
protected long flushedPos The position prior to which data may be discarded.
protected long streamPos The current read position within the stream.
Constructor Summary
ImageInputStreamImpl() Constructs an ImageInputStreamImpl.
Method Summary
protected void checkClosed() Throws an IOException if the stream has been closed.
void close() Closes the stream.
protected void finalize() Finalizes this object prior to garbage collection.
void flush() Discards the initial position of the stream prior to the current stream position.
void flushBefore(long pos) Discards the initial portion of the stream prior to the indicated postion.
int getBitOffset() Returns the current bit offset, as an integer between 0 and 7, inclusive.
ByteOrder getByteOrder() Returns the byte order with which data values will be read from this stream as an instance of thejava.nio.ByteOrder enumeration.
long getFlushedPosition() Returns the earliest position in the stream to which seeking may be performed.
long getStreamPosition() Returns the current byte position of the stream.
boolean isCached() Default implementation returns false.
boolean isCachedFile() Default implementation returns false.
boolean isCachedMemory() Default implementation returns false.
long length() Returns -1L to indicate that the stream has unknown length.
void mark() Pushes the current stream position onto a stack of marked positions.
abstract int read() Reads a single byte from the stream and returns it as anint between 0 and 255.
int read(byte[] b) A convenience method that calls read(b, 0, b.length).
abstract int [read](../../../javax/imageio/stream/ImageInputStreamImpl.html#read%28byte[], int, int%29)(byte[] b, int off, int len) Reads up to len bytes from the stream, and stores them into b starting at index off.
int readBit() Reads a single bit from the stream and returns it as anint with the value 0 or1.
long readBits(int numBits) Reads a bitstring from the stream and returns it as along, with the first bit read becoming the most significant bit of the output.
boolean readBoolean() Reads a byte from the stream and returns a boolean value of true if it is nonzero, false if it is zero.
byte readByte() Reads a byte from the stream and returns it as abyte value.
void [readBytes](../../../javax/imageio/stream/ImageInputStreamImpl.html#readBytes%28javax.imageio.stream.IIOByteBuffer, int%29)(IIOByteBuffer buf, int len) Reads up to len bytes from the stream, and modifies the supplied IIOByteBuffer to indicate the byte array, offset, and length where the data may be found.
char readChar() Equivalent to readUnsignedShort, except that the result is returned using the char datatype.
double readDouble() Reads 8 bytes from the stream, and (conceptually) concatenates them according to the current byte order and returns the result as a double.
float readFloat() Reads 4 bytes from the stream, and (conceptually) concatenates them according to the current byte order and returns the result as a float.
void readFully(byte[] b) Reads b.length bytes from the stream, and stores them into b starting at index 0.
void [readFully](../../../javax/imageio/stream/ImageInputStreamImpl.html#readFully%28byte[], int, int%29)(byte[] b, int off, int len) Reads len bytes from the stream, and stores them into b starting at index off.
void [readFully](../../../javax/imageio/stream/ImageInputStreamImpl.html#readFully%28char[], int, int%29)(char[] c, int off, int len) Reads len chars (unsigned 16-bit integers) from the stream according to the current byte order, and stores them into c starting at indexoff.
void [readFully](../../../javax/imageio/stream/ImageInputStreamImpl.html#readFully%28double[], int, int%29)(double[] d, int off, int len) Reads len doubles (64-bit IEEE double-precision floats) from the stream according to the current byte order, and stores them into d starting at index off.
void [readFully](../../../javax/imageio/stream/ImageInputStreamImpl.html#readFully%28float[], int, int%29)(float[] f, int off, int len) Reads len floats (32-bit IEEE single-precision floats) from the stream according to the current byte order, and stores them into f starting at index off.
void [readFully](../../../javax/imageio/stream/ImageInputStreamImpl.html#readFully%28int[], int, int%29)(int[] i, int off, int len) Reads len ints (signed 32-bit integers) from the stream according to the current byte order, and stores them into i starting at indexoff.
void [readFully](../../../javax/imageio/stream/ImageInputStreamImpl.html#readFully%28long[], int, int%29)(long[] l, int off, int len) Reads len longs (signed 64-bit integers) from the stream according to the current byte order, and stores them into l starting at indexoff.
void [readFully](../../../javax/imageio/stream/ImageInputStreamImpl.html#readFully%28short[], int, int%29)(short[] s, int off, int len) Reads len shorts (signed 16-bit integers) from the stream according to the current byte order, and stores them into s starting at indexoff.
int readInt() Reads 4 bytes from the stream, and (conceptually) concatenates them according to the current byte order and returns the result as an int.
String readLine() Reads the next line of text from the input stream.
long readLong() Reads 8 bytes from the stream, and (conceptually) concatenates them according to the current byte order and returns the result as a long.
short readShort() Reads two bytes from the stream, and (conceptually) concatenates them according to the current byte order, and returns the result as a short value.
int readUnsignedByte() Reads a byte from the stream, and (conceptually) converts it to an int, masks it with 0xff in order to strip off any sign-extension bits, and returns it as a byte value.
long readUnsignedInt() Reads 4 bytes from the stream, and (conceptually) concatenates them according to the current byte order, converts the result to a long, masks it with 0xffffffffL in order to strip off any sign-extension bits, and returns the result as an unsigned long value.
int readUnsignedShort() Reads two bytes from the stream, and (conceptually) concatenates them according to the current byte order, converts the resulting value to an int, masks it with0xffff in order to strip off any sign-extension buts, and returns the result as an unsigned int value.
String readUTF() Reads in a string that has been encoded using amodified UTF-8 format.
void reset() Resets the current stream byte and bit positions from the stack of marked positions.
void seek(long pos) Sets the current stream position to the desired location.
void setBitOffset(int bitOffset) Sets the bit offset to an integer between 0 and 7, inclusive.
void setByteOrder(ByteOrder byteOrder) Sets the desired byte order for future reads of data values from this stream.
int skipBytes(int n) Advances the current stream position by callingseek(getStreamPosition() + n).
long skipBytes(long n) Advances the current stream position by callingseek(getStreamPosition() + n).
Methods inherited from class java.lang.Object
clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, [wait](../../../java/lang/Object.html#wait%28long, int%29)
Field Detail

byteOrder

protected ByteOrder byteOrder

The byte order of the stream as an instance of the enumeration class java.nio.ByteOrder, whereByteOrder.BIG_ENDIAN indicates network byte order and ByteOrder.LITTLE_ENDIAN indicates the reverse order. By default, the value isByteOrder.BIG_ENDIAN.

streamPos

protected long streamPos

The current read position within the stream. Subclasses are responsible for keeping this value current from any method they override that alters the read position.

bitOffset

protected int bitOffset

The current bit offset within the stream. Subclasses are responsible for keeping this value current from any method they override that alters the bit offset.

flushedPos

protected long flushedPos

The position prior to which data may be discarded. Seeking to a smaller position is not allowed. flushedPos will always be >= 0.

Constructor Detail

ImageInputStreamImpl

public ImageInputStreamImpl()

Constructs an ImageInputStreamImpl.

Method Detail

checkClosed

protected final void checkClosed() throws IOException

Throws an IOException if the stream has been closed. Subclasses may call this method from any of their methods that require the stream not to be closed.

Throws:

[IOException](../../../java/io/IOException.html "class in java.io") - if the stream is closed.

setByteOrder

public void setByteOrder(ByteOrder byteOrder)

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#setByteOrder%28java.nio.ByteOrder%29)

Sets the desired byte order for future reads of data values from this stream. For example, the sequence of bytes '0x01 0x02 0x03 0x04' if read as a 4-byte integer would have the value '0x01020304' using network byte order and the value '0x04030201' under the reverse byte order.

The enumeration class java.nio.ByteOrder is used to specify the byte order. A value ofByteOrder.BIG_ENDIAN specifies so-called big-endian or network byte order, in which the high-order byte comes first. Motorola and Sparc processors store data in this format, while Intel processors store data in the reverseByteOrder.LITTLE_ENDIAN order.

The byte order has no effect on the results returned from the readBits method (or the value written byImageOutputStream.writeBits).

Specified by:

[setByteOrder](../../../javax/imageio/stream/ImageInputStream.html#setByteOrder%28java.nio.ByteOrder%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Parameters:

byteOrder - one of ByteOrder.BIG_ENDIAN orjava.nio.ByteOrder.LITTLE_ENDIAN, indicating whether network byte order or its reverse will be used for future reads.

See Also:

ByteOrder, ImageInputStream.getByteOrder(), ImageInputStream.readBits(int)

getByteOrder

public ByteOrder getByteOrder()

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#getByteOrder%28%29)

Returns the byte order with which data values will be read from this stream as an instance of thejava.nio.ByteOrder enumeration.

Specified by:

[getByteOrder](../../../javax/imageio/stream/ImageInputStream.html#getByteOrder%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Returns:

one of ByteOrder.BIG_ENDIAN orByteOrder.LITTLE_ENDIAN, indicating which byte order is being used.

See Also:

ByteOrder, ImageInputStream.setByteOrder(java.nio.ByteOrder)

read

public abstract int read() throws IOException

Reads a single byte from the stream and returns it as anint between 0 and 255. If EOF is reached, -1 is returned.

Subclasses must provide an implementation for this method. The subclass implementation should update the stream position before exiting.

The bit offset within the stream must be reset to zero before the read occurs.

Specified by:

[read](../../../javax/imageio/stream/ImageInputStream.html#read%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Returns:

the value of the next byte in the stream, or -1 if EOF is reached.

Throws:

[IOException](../../../java/io/IOException.html "class in java.io") - if the stream has been closed.

read

public int read(byte[] b) throws IOException

A convenience method that calls read(b, 0, b.length).

The bit offset within the stream is reset to zero before the read occurs.

Specified by:

[read](../../../javax/imageio/stream/ImageInputStream.html#read%28byte[]%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Parameters:

b - an array of bytes to be written to.

Returns:

the number of bytes actually read, or -1 to indicate EOF.

Throws:

[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang") - if b isnull.

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

read

public abstract int read(byte[] b, int off, int len) throws IOException

Reads up to len bytes from the stream, and stores them into b starting at index off. If no bytes can be read because the end of the stream has been reached, -1 is returned.

The bit offset within the stream must be reset to zero before the read occurs.

Subclasses must provide an implementation for this method. The subclass implementation should update the stream position before exiting.

Specified by:

[read](../../../javax/imageio/stream/ImageInputStream.html#read%28byte[], int, int%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Parameters:

b - an array of bytes to be written to.

off - the starting position within b to write to.

len - the maximum number of bytes to read.

Returns:

the number of bytes actually read, or -1 to indicate EOF.

Throws:

[IndexOutOfBoundsException](../../../java/lang/IndexOutOfBoundsException.html "class in java.lang") - if off is negative, len is negative, or off + len is greater than b.length.

[NullPointerException](../../../java/lang/NullPointerException.html "class in java.lang") - if b isnull.

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

readBytes

public void readBytes(IIOByteBuffer buf, int len) throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#readBytes%28javax.imageio.stream.IIOByteBuffer, int%29)

Reads up to len bytes from the stream, and modifies the supplied IIOByteBuffer to indicate the byte array, offset, and length where the data may be found. The caller should not attempt to modify the data found in theIIOByteBuffer.

The bit offset within the stream is reset to zero before the read occurs.

Specified by:

[readBytes](../../../javax/imageio/stream/ImageInputStream.html#readBytes%28javax.imageio.stream.IIOByteBuffer, int%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Parameters:

buf - an IIOByteBuffer object to be modified.

len - the maximum number of bytes to read.

Throws:

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

readBoolean

public boolean readBoolean() throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#readBoolean%28%29)

Reads a byte from the stream and returns a boolean value of true if it is nonzero, false if it is zero.

The bit offset within the stream is reset to zero before the read occurs.

Specified by:

[readBoolean](../../../java/io/DataInput.html#readBoolean%28%29) in interface [DataInput](../../../java/io/DataInput.html "interface in java.io")

Specified by:

[readBoolean](../../../javax/imageio/stream/ImageInputStream.html#readBoolean%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Returns:

a boolean value from the stream.

Throws:

[EOFException](../../../java/io/EOFException.html "class in java.io") - if the end of the stream is reached.

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

readByte

public byte readByte() throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#readByte%28%29)

Reads a byte from the stream and returns it as abyte value. Byte values between 0x00 and 0x7f represent integer values between0 and 127. Values between0x80 and 0xff represent negative values from -128 to /1.

The bit offset within the stream is reset to zero before the read occurs.

Specified by:

[readByte](../../../java/io/DataInput.html#readByte%28%29) in interface [DataInput](../../../java/io/DataInput.html "interface in java.io")

Specified by:

[readByte](../../../javax/imageio/stream/ImageInputStream.html#readByte%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Returns:

a signed byte value from the stream.

Throws:

[EOFException](../../../java/io/EOFException.html "class in java.io") - if the end of the stream is reached.

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

readUnsignedByte

public int readUnsignedByte() throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#readUnsignedByte%28%29)

Reads a byte from the stream, and (conceptually) converts it to an int, masks it with 0xff in order to strip off any sign-extension bits, and returns it as a byte value.

Thus, byte values between 0x00 and0x7f are simply returned as integer values between0 and 127. Values between0x80 and 0xff, which normally represent negative bytevalues, will be mapped into positive integers between 128 and255.

The bit offset within the stream is reset to zero before the read occurs.

Specified by:

[readUnsignedByte](../../../java/io/DataInput.html#readUnsignedByte%28%29) in interface [DataInput](../../../java/io/DataInput.html "interface in java.io")

Specified by:

[readUnsignedByte](../../../javax/imageio/stream/ImageInputStream.html#readUnsignedByte%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Returns:

an unsigned byte value from the stream.

Throws:

[EOFException](../../../java/io/EOFException.html "class in java.io") - if the end of the stream is reached.

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

readShort

public short readShort() throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#readShort%28%29)

Reads two bytes from the stream, and (conceptually) concatenates them according to the current byte order, and returns the result as a short value.

The bit offset within the stream is reset to zero before the read occurs.

Specified by:

[readShort](../../../java/io/DataInput.html#readShort%28%29) in interface [DataInput](../../../java/io/DataInput.html "interface in java.io")

Specified by:

[readShort](../../../javax/imageio/stream/ImageInputStream.html#readShort%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Returns:

a signed short value from the stream.

Throws:

[EOFException](../../../java/io/EOFException.html "class in java.io") - if the stream reaches the end before reading all the bytes.

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

See Also:

ImageInputStream.getByteOrder()

readUnsignedShort

public int readUnsignedShort() throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#readUnsignedShort%28%29)

Reads two bytes from the stream, and (conceptually) concatenates them according to the current byte order, converts the resulting value to an int, masks it with0xffff in order to strip off any sign-extension buts, and returns the result as an unsigned int value.

The bit offset within the stream is reset to zero before the read occurs.

Specified by:

[readUnsignedShort](../../../java/io/DataInput.html#readUnsignedShort%28%29) in interface [DataInput](../../../java/io/DataInput.html "interface in java.io")

Specified by:

[readUnsignedShort](../../../javax/imageio/stream/ImageInputStream.html#readUnsignedShort%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Returns:

an unsigned short value from the stream, as an int.

Throws:

[EOFException](../../../java/io/EOFException.html "class in java.io") - if the stream reaches the end before reading all the bytes.

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

See Also:

ImageInputStream.getByteOrder()

readChar

public char readChar() throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#readChar%28%29)

Equivalent to readUnsignedShort, except that the result is returned using the char datatype.

The bit offset within the stream is reset to zero before the read occurs.

Specified by:

[readChar](../../../java/io/DataInput.html#readChar%28%29) in interface [DataInput](../../../java/io/DataInput.html "interface in java.io")

Specified by:

[readChar](../../../javax/imageio/stream/ImageInputStream.html#readChar%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Returns:

an unsigned char value from the stream.

Throws:

[EOFException](../../../java/io/EOFException.html "class in java.io") - if the stream reaches the end before reading all the bytes.

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

See Also:

ImageInputStream.readUnsignedShort()

readInt

public int readInt() throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#readInt%28%29)

Reads 4 bytes from the stream, and (conceptually) concatenates them according to the current byte order and returns the result as an int.

The bit offset within the stream is ignored and treated as though it were zero.

Specified by:

[readInt](../../../java/io/DataInput.html#readInt%28%29) in interface [DataInput](../../../java/io/DataInput.html "interface in java.io")

Specified by:

[readInt](../../../javax/imageio/stream/ImageInputStream.html#readInt%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Returns:

a signed int value from the stream.

Throws:

[EOFException](../../../java/io/EOFException.html "class in java.io") - if the stream reaches the end before reading all the bytes.

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

See Also:

ImageInputStream.getByteOrder()

readUnsignedInt

public long readUnsignedInt() throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#readUnsignedInt%28%29)

Reads 4 bytes from the stream, and (conceptually) concatenates them according to the current byte order, converts the result to a long, masks it with 0xffffffffL in order to strip off any sign-extension bits, and returns the result as an unsigned long value.

The bit offset within the stream is reset to zero before the read occurs.

Specified by:

[readUnsignedInt](../../../javax/imageio/stream/ImageInputStream.html#readUnsignedInt%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Returns:

an unsigned int value from the stream, as a long.

Throws:

[EOFException](../../../java/io/EOFException.html "class in java.io") - if the stream reaches the end before reading all the bytes.

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

See Also:

ImageInputStream.getByteOrder()

readLong

public long readLong() throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#readLong%28%29)

Reads 8 bytes from the stream, and (conceptually) concatenates them according to the current byte order and returns the result as a long.

The bit offset within the stream is reset to zero before the read occurs.

Specified by:

[readLong](../../../java/io/DataInput.html#readLong%28%29) in interface [DataInput](../../../java/io/DataInput.html "interface in java.io")

Specified by:

[readLong](../../../javax/imageio/stream/ImageInputStream.html#readLong%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Returns:

a signed long value from the stream.

Throws:

[EOFException](../../../java/io/EOFException.html "class in java.io") - if the stream reaches the end before reading all the bytes.

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

See Also:

ImageInputStream.getByteOrder()

readFloat

public float readFloat() throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#readFloat%28%29)

Reads 4 bytes from the stream, and (conceptually) concatenates them according to the current byte order and returns the result as a float.

The bit offset within the stream is reset to zero before the read occurs.

Specified by:

[readFloat](../../../java/io/DataInput.html#readFloat%28%29) in interface [DataInput](../../../java/io/DataInput.html "interface in java.io")

Specified by:

[readFloat](../../../javax/imageio/stream/ImageInputStream.html#readFloat%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Returns:

a float value from the stream.

Throws:

[EOFException](../../../java/io/EOFException.html "class in java.io") - if the stream reaches the end before reading all the bytes.

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

See Also:

ImageInputStream.getByteOrder()

readDouble

public double readDouble() throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#readDouble%28%29)

Reads 8 bytes from the stream, and (conceptually) concatenates them according to the current byte order and returns the result as a double.

The bit offset within the stream is reset to zero before the read occurs.

Specified by:

[readDouble](../../../java/io/DataInput.html#readDouble%28%29) in interface [DataInput](../../../java/io/DataInput.html "interface in java.io")

Specified by:

[readDouble](../../../javax/imageio/stream/ImageInputStream.html#readDouble%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Returns:

a double value from the stream.

Throws:

[EOFException](../../../java/io/EOFException.html "class in java.io") - if the stream reaches the end before reading all the bytes.

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

See Also:

ImageInputStream.getByteOrder()

readLine

public String readLine() throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#readLine%28%29)

Reads the next line of text from the input stream. It reads successive bytes, converting each byte separately into a character, until it encounters a line terminator or end of file; the characters read are then returned as aString. Note that because this method processes bytes, it does not support input of the full Unicode character set.

If end of file is encountered before even one byte can be read, then null is returned. Otherwise, each byte that is read is converted to type char by zero-extension. If the character '\n' is encountered, it is discarded and reading ceases. If the character '\r' is encountered, it is discarded and, if the following byte converts to the character'\n', then that is discarded also; reading then ceases. If end of file is encountered before either of the characters '\n' and '\r' is encountered, reading ceases. Once reading has ceased, aString is returned that contains all the characters read and not discarded, taken in order. Note that every character in this string will have a value less than\u0100, that is, (char)256.

The bit offset within the stream is reset to zero before the read occurs.

Specified by:

[readLine](../../../java/io/DataInput.html#readLine%28%29) in interface [DataInput](../../../java/io/DataInput.html "interface in java.io")

Specified by:

[readLine](../../../javax/imageio/stream/ImageInputStream.html#readLine%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Returns:

a String containing a line of text from the stream.

Throws:

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

readUTF

public String readUTF() throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#readUTF%28%29)

Reads in a string that has been encoded using amodified UTF-8 format. The general contract of readUTF is that it reads a representation of a Unicode character string encoded in modified UTF-8 format; this string of characters is then returned as a String.

First, two bytes are read and used to construct an unsigned 16-bit integer in the manner of thereadUnsignedShort method, using network byte order (regardless of the current byte order setting). This integer value is called the UTF length and specifies the number of additional bytes to be read. These bytes are then converted to characters by considering them in groups. The length of each group is computed from the value of the first byte of the group. The byte following a group, if any, is the first byte of the next group.

If the first byte of a group matches the bit pattern0xxxxxxx (where x means "may be0 or 1"), then the group consists of just that byte. The byte is zero-extended to form a character.

If the first byte of a group matches the bit pattern110xxxxx, then the group consists of that bytea and a second byte b. If there is no byte b (because byte a was the last of the bytes to be read), or if byte b does not match the bit pattern 10xxxxxx, then aUTFDataFormatException is thrown. Otherwise, the group is converted to the character:


 (char)(((a& 0x1F) << 6) | (b & 0x3F))

If the first byte of a group matches the bit pattern1110xxxx, then the group consists of that bytea and two more bytes b andc. If there is no byte c (because byte a was one of the last two of the bytes to be read), or either byte b or byte c does not match the bit pattern 10xxxxxx, then aUTFDataFormatException is thrown. Otherwise, the group is converted to the character:


 (char)(((a & 0x0F) << 12) | ((b & 0x3F) << 6) | (c & 0x3F))

If the first byte of a group matches the pattern1111xxxx or the pattern 10xxxxxx, then a UTFDataFormatException is thrown.

If end of file is encountered at any time during this entire process, then an EOFException is thrown.

After every group has been converted to a character by this process, the characters are gathered, in the same order in which their corresponding groups were read from the input stream, to form a String, which is returned.

The current byte order setting is ignored.

The bit offset within the stream is reset to zero before the read occurs.

Note: This method should not be used in the implementation of image formats that use standard UTF-8, because the modified UTF-8 used here is incompatible with standard UTF-8.

Specified by:

[readUTF](../../../java/io/DataInput.html#readUTF%28%29) in interface [DataInput](../../../java/io/DataInput.html "interface in java.io")

Specified by:

[readUTF](../../../javax/imageio/stream/ImageInputStream.html#readUTF%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Returns:

a String read from the stream.

Throws:

[EOFException](../../../java/io/EOFException.html "class in java.io") - if this stream reaches the end before reading all the bytes.

[UTFDataFormatException](../../../java/io/UTFDataFormatException.html "class in java.io") - if the bytes do not represent a valid modified UTF-8 encoding of a string.

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

readFully

public void readFully(byte[] b, int off, int len) throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#readFully%28byte[], int, int%29)

Reads len bytes from the stream, and stores them into b starting at index off. If the end of the stream is reached, an EOFException will be thrown.

The bit offset within the stream is reset to zero before the read occurs.

Specified by:

[readFully](../../../java/io/DataInput.html#readFully%28byte[], int, int%29) in interface [DataInput](../../../java/io/DataInput.html "interface in java.io")

Specified by:

[readFully](../../../javax/imageio/stream/ImageInputStream.html#readFully%28byte[], int, int%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Parameters:

b - an array of bytes to be written to.

off - the starting position within b to write to.

len - the maximum number of bytes to read.

Throws:

[EOFException](../../../java/io/EOFException.html "class in java.io") - if the stream reaches the end before reading all the bytes.

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

readFully

public void readFully(byte[] b) throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#readFully%28byte[]%29)

Reads b.length bytes from the stream, and stores them into b starting at index 0. If the end of the stream is reached, an EOFException will be thrown.

The bit offset within the stream is reset to zero before the read occurs.

Specified by:

[readFully](../../../java/io/DataInput.html#readFully%28byte[]%29) in interface [DataInput](../../../java/io/DataInput.html "interface in java.io")

Specified by:

[readFully](../../../javax/imageio/stream/ImageInputStream.html#readFully%28byte[]%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Parameters:

b - an array of bytes.

Throws:

[EOFException](../../../java/io/EOFException.html "class in java.io") - if the stream reaches the end before reading all the bytes.

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

readFully

public void readFully(short[] s, int off, int len) throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#readFully%28short[], int, int%29)

Reads len shorts (signed 16-bit integers) from the stream according to the current byte order, and stores them into s starting at indexoff. If the end of the stream is reached, anEOFException will be thrown.

The bit offset within the stream is reset to zero before the read occurs.

Specified by:

[readFully](../../../javax/imageio/stream/ImageInputStream.html#readFully%28short[], int, int%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Parameters:

s - an array of shorts to be written to.

off - the starting position withinb to write to.

len - the maximum number of shorts to read.

Throws:

[EOFException](../../../java/io/EOFException.html "class in java.io") - if the stream reaches the end before reading all the bytes.

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

readFully

public void readFully(char[] c, int off, int len) throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#readFully%28char[], int, int%29)

Reads len chars (unsigned 16-bit integers) from the stream according to the current byte order, and stores them into c starting at indexoff. If the end of the stream is reached, anEOFException will be thrown.

The bit offset within the stream is reset to zero before the read occurs.

Specified by:

[readFully](../../../javax/imageio/stream/ImageInputStream.html#readFully%28char[], int, int%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Parameters:

c - an array of chars to be written to.

off - the starting position withinb to write to.

len - the maximum number of chars to read.

Throws:

[EOFException](../../../java/io/EOFException.html "class in java.io") - if the stream reaches the end before reading all the bytes.

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

readFully

public void readFully(int[] i, int off, int len) throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#readFully%28int[], int, int%29)

Reads len ints (signed 32-bit integers) from the stream according to the current byte order, and stores them into i starting at indexoff. If the end of the stream is reached, anEOFException will be thrown.

The bit offset within the stream is reset to zero before the read occurs.

Specified by:

[readFully](../../../javax/imageio/stream/ImageInputStream.html#readFully%28int[], int, int%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Parameters:

i - an array of ints to be written to.

off - the starting position withinb to write to.

len - the maximum number of ints to read.

Throws:

[EOFException](../../../java/io/EOFException.html "class in java.io") - if the stream reaches the end before reading all the bytes.

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

readFully

public void readFully(long[] l, int off, int len) throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#readFully%28long[], int, int%29)

Reads len longs (signed 64-bit integers) from the stream according to the current byte order, and stores them into l starting at indexoff. If the end of the stream is reached, anEOFException will be thrown.

The bit offset within the stream is reset to zero before the read occurs.

Specified by:

[readFully](../../../javax/imageio/stream/ImageInputStream.html#readFully%28long[], int, int%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Parameters:

l - an array of longs to be written to.

off - the starting position withinb to write to.

len - the maximum number of longs to read.

Throws:

[EOFException](../../../java/io/EOFException.html "class in java.io") - if the stream reaches the end before reading all the bytes.

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

readFully

public void readFully(float[] f, int off, int len) throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#readFully%28float[], int, int%29)

Reads len floats (32-bit IEEE single-precision floats) from the stream according to the current byte order, and stores them into f starting at index off. If the end of the stream is reached, an EOFException will be thrown.

The bit offset within the stream is reset to zero before the read occurs.

Specified by:

[readFully](../../../javax/imageio/stream/ImageInputStream.html#readFully%28float[], int, int%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Parameters:

f - an array of floats to be written to.

off - the starting position withinb to write to.

len - the maximum number of floats to read.

Throws:

[EOFException](../../../java/io/EOFException.html "class in java.io") - if the stream reaches the end before reading all the bytes.

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

readFully

public void readFully(double[] d, int off, int len) throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#readFully%28double[], int, int%29)

Reads len doubles (64-bit IEEE double-precision floats) from the stream according to the current byte order, and stores them into d starting at index off. If the end of the stream is reached, an EOFException will be thrown.

The bit offset within the stream is reset to zero before the read occurs.

Specified by:

[readFully](../../../javax/imageio/stream/ImageInputStream.html#readFully%28double[], int, int%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Parameters:

d - an array of doubles to be written to.

off - the starting position withinb to write to.

len - the maximum number of doubles to read.

Throws:

[EOFException](../../../java/io/EOFException.html "class in java.io") - if the stream reaches the end before reading all the bytes.

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

getStreamPosition

public long getStreamPosition() throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#getStreamPosition%28%29)

Returns the current byte position of the stream. The next read will take place starting at this offset.

Specified by:

[getStreamPosition](../../../javax/imageio/stream/ImageInputStream.html#getStreamPosition%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Returns:

a long containing the position of the stream.

Throws:

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

getBitOffset

public int getBitOffset() throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#getBitOffset%28%29)

Returns the current bit offset, as an integer between 0 and 7, inclusive. The bit offset is updated implicitly by calls to the readBits method. A value of 0 indicates the most-significant bit, and a value of 7 indicates the least significant bit, of the byte being read.

The bit offset is set to 0 when a stream is first opened, and is reset to 0 by calls to seek,skipBytes, or any read or readFully method.

Specified by:

[getBitOffset](../../../javax/imageio/stream/ImageInputStream.html#getBitOffset%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Returns:

an int containing the bit offset between 0 and 7, inclusive.

Throws:

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

See Also:

ImageInputStream.setBitOffset(int)

setBitOffset

public void setBitOffset(int bitOffset) throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#setBitOffset%28int%29)

Sets the bit offset to an integer between 0 and 7, inclusive. The byte offset within the stream, as returned bygetStreamPosition, is left unchanged. A value of 0 indicates the most-significant bit, and a value of 7 indicates the least significant bit, of the byte being read.

Specified by:

[setBitOffset](../../../javax/imageio/stream/ImageInputStream.html#setBitOffset%28int%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Parameters:

bitOffset - the desired offset, as an int between 0 and 7, inclusive.

Throws:

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

See Also:

ImageInputStream.getBitOffset()

readBit

public int readBit() throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#readBit%28%29)

Reads a single bit from the stream and returns it as anint with the value 0 or1. The bit offset is advanced by one and reduced modulo 8.

Specified by:

[readBit](../../../javax/imageio/stream/ImageInputStream.html#readBit%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Returns:

an int containing the value 0 or 1.

Throws:

[EOFException](../../../java/io/EOFException.html "class in java.io") - if the stream reaches the end before reading all the bits.

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

readBits

public long readBits(int numBits) throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#readBits%28int%29)

Reads a bitstring from the stream and returns it as along, with the first bit read becoming the most significant bit of the output. The read starts within the byte indicated by getStreamPosition, at the bit given by getBitOffset. The bit offset is advanced bynumBits and reduced modulo 8.

The byte order of the stream has no effect on this method. The return value of this method is constructed as though the bits were read one at a time, and shifted into the right side of the return value, as shown by the following pseudo-code:

long accum = 0L; for (int i = 0; i < numBits; i++) { accum <<= 1; // Shift left one bit to make room accum |= readBit(); }

Note that the result of readBits(32) may thus not be equal to that of readInt() if a reverse network byte order is being used (i.e., getByteOrder() == false).

If the end of the stream is encountered before all the bits have been read, an EOFException is thrown.

Specified by:

[readBits](../../../javax/imageio/stream/ImageInputStream.html#readBits%28int%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Parameters:

numBits - the number of bits to read, as an int between 0 and 64, inclusive.

Returns:

the bitstring, as a long with the last bit read stored in the least significant bit.

Throws:

[EOFException](../../../java/io/EOFException.html "class in java.io") - if the stream reaches the end before reading all the bits.

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

length

public long length()

Returns -1L to indicate that the stream has unknown length. Subclasses must override this method to provide actual length information.

Specified by:

[length](../../../javax/imageio/stream/ImageInputStream.html#length%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Returns:

-1L to indicate unknown length.

skipBytes

public int skipBytes(int n) throws IOException

Advances the current stream position by callingseek(getStreamPosition() + n).

The bit offset is reset to zero.

Specified by:

[skipBytes](../../../java/io/DataInput.html#skipBytes%28int%29) in interface [DataInput](../../../java/io/DataInput.html "interface in java.io")

Specified by:

[skipBytes](../../../javax/imageio/stream/ImageInputStream.html#skipBytes%28int%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Parameters:

n - the number of bytes to seek forward.

Returns:

an int representing the number of bytes skipped.

Throws:

[IOException](../../../java/io/IOException.html "class in java.io") - if getStreamPosition throws an IOException when computing either the starting or ending position.

skipBytes

public long skipBytes(long n) throws IOException

Advances the current stream position by callingseek(getStreamPosition() + n).

The bit offset is reset to zero.

Specified by:

[skipBytes](../../../javax/imageio/stream/ImageInputStream.html#skipBytes%28long%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Parameters:

n - the number of bytes to seek forward.

Returns:

a long representing the number of bytes skipped.

Throws:

[IOException](../../../java/io/IOException.html "class in java.io") - if getStreamPosition throws an IOException when computing either the starting or ending position.

seek

public void seek(long pos) throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#seek%28long%29)

Sets the current stream position to the desired location. The next read will occur at this location. The bit offset is set to 0.

An IndexOutOfBoundsException will be thrown ifpos is smaller than the flushed position (as returned by getflushedPosition).

It is legal to seek past the end of the file; anEOFException will be thrown only if a read is performed.

Specified by:

[seek](../../../javax/imageio/stream/ImageInputStream.html#seek%28long%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Parameters:

pos - a long containing the desired file pointer position.

Throws:

[IOException](../../../java/io/IOException.html "class in java.io") - if any other I/O error occurs.

mark

public void mark()

Pushes the current stream position onto a stack of marked positions.

Specified by:

[mark](../../../javax/imageio/stream/ImageInputStream.html#mark%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

reset

public void reset() throws IOException

Resets the current stream byte and bit positions from the stack of marked positions.

An IOException will be thrown if the previous marked position lies in the discarded portion of the stream.

Specified by:

[reset](../../../javax/imageio/stream/ImageInputStream.html#reset%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Throws:

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

flushBefore

public void flushBefore(long pos) throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#flushBefore%28long%29)

Discards the initial portion of the stream prior to the indicated postion. Attempting to seek to an offset within the flushed portion of the stream will result in anIndexOutOfBoundsException.

Calling flushBefore may allow classes implementing this interface to free up resources such as memory or disk space that are being used to store data from the stream.

Specified by:

[flushBefore](../../../javax/imageio/stream/ImageInputStream.html#flushBefore%28long%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Parameters:

pos - a long containing the length of the stream prefix that may be flushed.

Throws:

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

flush

public void flush() throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#flush%28%29)

Discards the initial position of the stream prior to the current stream position. Equivalent toflushBefore(getStreamPosition()).

Specified by:

[flush](../../../javax/imageio/stream/ImageInputStream.html#flush%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Throws:

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

getFlushedPosition

public long getFlushedPosition()

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#getFlushedPosition%28%29)

Returns the earliest position in the stream to which seeking may be performed. The returned value will be the maximum of all values passed into previous calls toflushBefore.

Specified by:

[getFlushedPosition](../../../javax/imageio/stream/ImageInputStream.html#getFlushedPosition%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Returns:

the earliest legal position for seeking, as along.

isCached

public boolean isCached()

Default implementation returns false. Subclasses should override this if they cache data.

Specified by:

[isCached](../../../javax/imageio/stream/ImageInputStream.html#isCached%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Returns:

true if this ImageInputStream caches data.

See Also:

ImageInputStream.isCachedMemory(), ImageInputStream.isCachedFile()

isCachedMemory

public boolean isCachedMemory()

Default implementation returns false. Subclasses should override this if they cache data in main memory.

Specified by:

[isCachedMemory](../../../javax/imageio/stream/ImageInputStream.html#isCachedMemory%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Returns:

true if this ImageInputStream caches data in main memory.

See Also:

ImageInputStream.isCached(), ImageInputStream.isCachedFile()

isCachedFile

public boolean isCachedFile()

Default implementation returns false. Subclasses should override this if they cache data in a temporary file.

Specified by:

[isCachedFile](../../../javax/imageio/stream/ImageInputStream.html#isCachedFile%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Returns:

true if this ImageInputStream caches data in a temporary file.

See Also:

ImageInputStream.isCached(), ImageInputStream.isCachedMemory()

close

public void close() throws IOException

Description copied from interface: [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html#close%28%29)

Closes the stream. Attempts to access a stream that has been closed may result in IOExceptions or incorrect behavior. Calling this method may allow classes implementing this interface to release resources associated with the stream such as memory, disk space, or file descriptors.

Specified by:

[close](../../../javax/imageio/stream/ImageInputStream.html#close%28%29) in interface [ImageInputStream](../../../javax/imageio/stream/ImageInputStream.html "interface in javax.imageio.stream")

Throws:

[IOException](../../../java/io/IOException.html "class in java.io") - if an I/O error occurs.

finalize

protected void finalize() throws Throwable

Finalizes this object prior to garbage collection. Theclose method is called to close any open input source. This method should not be called from application code.

Overrides:

[finalize](../../../java/lang/Object.html#finalize%28%29) in class [Object](../../../java/lang/Object.html "class in java.lang")

Throws:

[Throwable](../../../java/lang/Throwable.html "class in java.lang") - if an error occurs during superclass finalization.

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