Java.io.Printstream Class in Java | Set 2 (original) (raw)

Last Updated : 01 May, 2024

Java.io.Printstream Class in Java | Set 1

**More Methods:

• **PrintStream printf(Locale l, String format, Object… args) : A convenience method to write a formatted string to this output stream using the specified format string and arguments.
  ****Syntax :**public PrintStream printf(Locale l,
  String format,
  Object... args)

**Parameters:
l - The locale to apply during formatting. If l is null then no localization is applied.
format - A format string as described in Format string syntax
args - Arguments referenced by the format specifiers in the format string.
**Returns:
This output stream
*Throws:
IllegalFormatException
NullPointerException
Java `
//Java program to demonstrate printf method
import java.io.;
import java.util.Locale;
class PrintStreamDemo
{
public static void main(String[] args)
{
String s = "for";

    // create printstream object  
    PrintStream printStream = new PrintStream(System.out);  
      
    // illustrating printf(Locale l, String format, Object... args) method  
    printStream.printf(Locale.US, "Geeks%sGeeks", s);  
}  

}
`
**Output:
GeeksforGeeks

• **PrintStream printf(String format, Object… args) : A convenience method to write a formatted string to this output stream using the specified format string and arguments.
  ****Syntax :**public PrintStream printf(String format,
  Object... args)

**Parameters:
format - A format string as described in Format string syntax
args - Arguments referenced by the format specifiers in the format string.
**Returns:
This output stream
*Throws:
IllegalFormatException
NullPointerException
Java `
//Java program to demonstrate printf(String format, Object... args) method
import java.io.;
public class PrintStreamDemo
{
public static void main(String[] args)
{
String s = "for";

    // create printstream object  
    PrintStream obj= new PrintStream(System.out);  
      
    // illustrating printf(String format, Object... args) method  
    obj.printf("Geeks%sGeeks", s);  
}  

}
`
**Output:
GeeksforGeeks

• **void println(): Terminates the current line by writing the line separator string.
  ****Syntax :**public void println()
  Java `
  //Java program to demonstrate println() methods
  import java.io.PrintStream;
  class PrintStreamDemo
  {
  public static void main(String[] args)
  {
  PrintStream obj = new PrintStream(System.out);
  
  //illustrating println();
  obj.println("GeeksforGeeks");
  }

}
`
**Output:
GeeksforGeeks

• **void println(boolean x): Prints a boolean and then terminate the line.
  ****Syntax :**public void println(boolean x)
  Java //Java program to demonstrate println(boolean) method import java.io.*; class PrintStreamDemo { public static void main(String[] args) { // create printstream object PrintStream obj = new PrintStream(System.out); //illustrating println(boolean) method obj.println(true); // flush the stream obj.flush(); } }
  **Output:
  true
• **void println(char x): Prints a character and then terminate the line.
  ****Syntax :*public void println(char x)
  Java `
  //Java program to demonstrate println(char x) method
  import java.io.;
  public class PrintStreamDemo
  {
  public static void main(String[] args)
  {
  char c = 'g';
  
  // create printstream object
  PrintStream obj = new PrintStream(System.out);
  
  // illustrating println(char x)
  obj.println(c);
  
  // flush the stream
  obj.flush();
  }

}
`
**Output:
g

• **void println(char[] x): Prints an array of characters and then terminate the line.
  ****Syntax :*public void println(char[] x)
  Java `
  //Java program to demonstrate println(char[] x) method
  import java.io.;
  public class PrintStreamDemo
  {
  public static void main(String[] args)
  {
  char[] c = {'G', 'E', 'E','K'};
  // create printstream object
  PrintStream obj = new PrintStream(System.out);
  // illustrating println(char[] x)
  obj.println(c);
  // flush the stream
  obj.flush();
  }

}
`
**Output:
GEEK

• **void println(double x): Prints a double and then terminate the line.
  ****Syntax :*public void println(double x)
  Java `
  //Java program to demonstrate println(double x) method
  import java.io.;
  public class PrintStreamDemo
  {
  public static void main(String[] args)
  {
  double c = 5.42762;
  
  // create printstream object
  PrintStream obj = new PrintStream(System.out);
  
  // illustrating println(double x)
  obj.println(c);
  
  // flush the stream
  obj.flush();
  }

}
` **Output:
5.42762

• **void println(float x): Prints a float and then terminate the line.
  ****Syntax :*public void println(float x)
  Java `
  //Java program to demonstrate println(float x) method
  import java.io.;
  public class PrintStreamDemo
  {
  public static void main(String[] args)
  {
  float c = 5.168502f;
  
  // create printstream object
  PrintStream obj = new PrintStream(System.out);
  // illustrating println(float x)
  obj.println(c);
  
  // flush the stream
  obj.flush();
  }

}
` **Output:
5.168502f

• **void println(int x): Prints an integer and then terminate the line.
  ****Syntax :*public void println(boolean x)
  Java `
  //Java program to demonstrate println(int x) method
  import java.io.;
  public class PrintStreamDemo
  {
  public static void main(String[] args)
  {

    int c = 5;  
      
    // create printstream object  
    PrintStream obj = new PrintStream(System.out);  
      
    // illustrating println(int x)  
    obj.println(c);  
      
    // flush the stream  
    obj.flush();  

  }

}
` **Output:
5

• **void println(long x): Prints a long and then terminate the line.
  ****Syntax :*public void println(long x)
  Java `
  //Java program to demonstrate println(long x) method
  import java.io.;
  public class PrintStreamDemo
  {
  public static void main(String[] args)
  {
  long c = 123456789l;
  try
  {
  // create printstream object
  PrintStream obj= new PrintStream(System.out);
  
  // illustrating println(long x)
  obj.println(c);
  
  // flush the stream
  obj.flush();
  }
  catch (Exception ex)
  {
  ex.printStackTrace();
  }
  }

}
` **Output:
123456789

• ****void println(Object x) :**Prints an Object and then terminate the line.
  ****Syntax :*public void println(Object x)
  Java `
  //Java program to demonstrate println(Object x) method
  import java.io.;
  public class PrintStreamDemo
  {

  public static void main(String[] args)
  {
  // create printstream object
  PrintStream obj = new PrintStream(System.out);
  
  //illustrating println(Object X)
  obj.println(obj);
  
  // flush the stream
  obj.flush();
  }

}
` **Output:
java.io.PrintStream@15db9742

• ****void println(String x) :**Prints a String and then terminate the line.
  ****Syntax :*public void println(boolean x)
  Java `
  import java.io.;
  //Java program to demonstrate println(String x) method
  public class PrintStreamDemo
  {
  public static void main(String[] args)
  {
  String c = "GeeksforGeeks";
  
  // create printstream object
  PrintStream ps = new PrintStream(System.out);
  
  // illustrating println(String x)
  ps.println(c);
  
  // flush the stream
  ps.flush();
  }

}
` **Output:
GeeksforGeeks

• ****protected void setError() :**Sets the error state of the stream to true.
  ****Syntax :*public void println(String x)
  Java `
  //Java program to demonstrate setError() method
  import java.io.;
  public class PrintStreamDemo extends PrintStream
  {
  public PrintStreamDemo(OutputStream out)
  {
  super(out);
  }
  public static void main(String[] args)
  {
  byte c[] = {65, 66, 67, 68, 69, 70, 71};
  
  // create printstream object
  PrintStreamDemo obj = new PrintStreamDemo(System.out);
  
  // illustrating write() method
  obj.write(c, 1, 3);
  
  // flush the stream
  obj.flush();
  
  //illustrating setError() method
  obj.setError();
  }

}
` **Output:
BCD

• ****void write(byte[] buf, int off, int len) :**Writes len bytes from the specified byte array starting at offset off to this stream.
  ****Syntax :**public void write(byte[] buf,
  int off,
  int len)

**Overrides:
write in class FilterOutputStream
*Parameters:
buf - A byte array
off - Offset from which to start taking bytes
len - Number of bytes to write
Java `
//Java program to demonstrate write(int b) method
import java.io.;
public class PrintStreamDemo
{
public static void main(String[] args)
{
byte c = 65;

    // create printstream object  
    PrintStream obj = new PrintStream(System.out);  
      
    //illustrating write(int b)  
    obj.write(c);  
  
    // flush the stream  
    obj.flush();  
  
}  

}
` **Output:
BCD

• ****void write(int b) :**Writes the specified byte to this stream.
  ****Syntax :*public void write(int b)
  Overrides:
  write in class FilterOutputStream
  Parameters:
  b - The byte to be written
  Java `
  //Java program to demonstrate write(int b) method
  import java.io.;
  public class PrintStreamDemo
  {
  public static void main(String[] args)
  {
  byte c = 65;
  
  // create printstream object
  PrintStream obj = new PrintStream(System.out);
  
  //illustrating write(int b)
  obj.write(c);
  
  // flush the stream
  obj.flush();
  }

}
` **Output:
A