ClassCastException | API reference | Android Developers (original) (raw)

public class ClassCastException
` extends [RuntimeException](/reference/java/lang/RuntimeException) `

java.lang.Object
↳	java.lang.Throwable
	↳	java.lang.Exception
		↳	java.lang.RuntimeException
			↳

Thrown to indicate that the code has attempted to cast an object to a subclass of which it is not an instance. For example, the following code generates a ClassCastException:

Object x = new Integer(0);
System.out.println((String)x);

Summary

Public constructors
ClassCastException() Constructs a ClassCastException with no detail message.
ClassCastException(String s) Constructs a ClassCastException with the specified detail message.

Inherited methods
From class java.lang.Throwable final void addSuppressed(Throwable exception) Appends the specified exception to the exceptions that were suppressed in order to deliver this exception. Throwable fillInStackTrace() Fills in the execution stack trace. Throwable getCause() Returns the cause of this throwable or null if the cause is nonexistent or unknown. String getLocalizedMessage() Creates a localized description of this throwable. String getMessage() Returns the detail message string of this throwable. StackTraceElement[] getStackTrace() Provides programmatic access to the stack trace information printed byprintStackTrace(). finalThrowable[] getSuppressed() Returns an array containing all of the exceptions that were suppressed, typically by the try-with-resources statement, in order to deliver this exception. Throwable initCause(Throwable cause) Initializes the cause of this throwable to the specified value. void printStackTrace() Prints this throwable and its backtrace to the standard error stream. void printStackTrace(PrintWriter s) Prints this throwable and its backtrace to the specified print writer. void printStackTrace(PrintStream s) Prints this throwable and its backtrace to the specified print stream. void setStackTrace(StackTraceElement[] stackTrace) Sets the stack trace elements that will be returned bygetStackTrace() and printed by printStackTrace() and related methods. String toString() Returns a short description of this throwable.
From class java.lang.Object Object clone() Creates and returns a copy of this object. boolean equals(Object obj) Indicates whether some other object is "equal to" this one. void finalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. finalClass<?> getClass() Returns the runtime class of this Object. int hashCode() Returns a hash code value for the object. final void notify() Wakes up a single thread that is waiting on this object's monitor. final void notifyAll() Wakes up all threads that are waiting on this object's monitor. String toString() Returns a string representation of the object. final void wait(long timeoutMillis, int nanos) Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed. final void wait(long timeoutMillis) Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed. final void wait() Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

Inherited methods

From class java.lang.Throwable final void addSuppressed(Throwable exception) Appends the specified exception to the exceptions that were suppressed in order to deliver this exception. Throwable fillInStackTrace() Fills in the execution stack trace. Throwable getCause() Returns the cause of this throwable or null if the cause is nonexistent or unknown. String getLocalizedMessage() Creates a localized description of this throwable. String getMessage() Returns the detail message string of this throwable. StackTraceElement[] getStackTrace() Provides programmatic access to the stack trace information printed byprintStackTrace(). finalThrowable[] getSuppressed() Returns an array containing all of the exceptions that were suppressed, typically by the try-with-resources statement, in order to deliver this exception. Throwable initCause(Throwable cause) Initializes the cause of this throwable to the specified value. void printStackTrace() Prints this throwable and its backtrace to the standard error stream. void printStackTrace(PrintWriter s) Prints this throwable and its backtrace to the specified print writer. void printStackTrace(PrintStream s) Prints this throwable and its backtrace to the specified print stream. void setStackTrace(StackTraceElement[] stackTrace) Sets the stack trace elements that will be returned bygetStackTrace() and printed by printStackTrace() and related methods. String toString() Returns a short description of this throwable.

From class java.lang.Object Object clone() Creates and returns a copy of this object. boolean equals(Object obj) Indicates whether some other object is "equal to" this one. void finalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. finalClass<?> getClass() Returns the runtime class of this Object. int hashCode() Returns a hash code value for the object. final void notify() Wakes up a single thread that is waiting on this object's monitor. final void notifyAll() Wakes up all threads that are waiting on this object's monitor. String toString() Returns a string representation of the object. final void wait(long timeoutMillis, int nanos) Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed. final void wait(long timeoutMillis) Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed. final void wait() Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

Public constructors

ClassCastException

public ClassCastException ()

Constructs a ClassCastException with no detail message.

ClassCastException

public ClassCastException (String s)

Constructs a ClassCastException with the specified detail message.

Parameters
s	String: the detail message.

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Last updated 2025-02-10 UTC.