Added in API level 1

AssertionError

public class AssertionError
extends Error

java.lang.Object
   ↳ java.lang.Throwable
     ↳ java.lang.Error
       ↳ java.lang.AssertionError


Thrown to indicate that an assertion has failed.

The seven one-argument public constructors provided by this class ensure that the assertion error returned by the invocation:

     new AssertionError(expression)
 
has as its detail message the string conversion of expression (as defined in section {@jls 5.1.11} of The Java Language Specification), regardless of the type of expression.

Summary

Public constructors

AssertionError()

Constructs an AssertionError with no detail message.

AssertionError(boolean detailMessage)

Constructs an AssertionError with its detail message derived from the specified boolean, which is converted to a string as defined in section {@jls 5.1.11} of The Java Language Specification.

AssertionError(char detailMessage)

Constructs an AssertionError with its detail message derived from the specified char, which is converted to a string as defined in section {@jls 5.1.11} of The Java Language Specification.

AssertionError(double detailMessage)

Constructs an AssertionError with its detail message derived from the specified double, which is converted to a string as defined in section {@jls 5.1.11} of The Java Language Specification.

AssertionError(float detailMessage)

Constructs an AssertionError with its detail message derived from the specified float, which is converted to a string as defined in section {@jls 5.1.11} of The Java Language Specification.

AssertionError(int detailMessage)

Constructs an AssertionError with its detail message derived from the specified int, which is converted to a string as defined in section {@jls 5.1.11} of The Java Language Specification.

AssertionError(Object detailMessage)

Constructs an AssertionError with its detail message derived from the specified object, which is converted to a string as defined in section {@jls 5.1.11} of The Java Language Specification.

AssertionError(String message, Throwable cause)

Constructs a new AssertionError with the specified detail message and cause.

AssertionError(long detailMessage)

Constructs an AssertionError with its detail message derived from the specified long, which is converted to a string as defined in section {@jls 5.1.11} of The Java Language Specification.

Inherited methods

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 by printStackTrace().

final Throwable[] 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 by getStackTrace() and printed by printStackTrace() and related methods.

String toString()

Returns a short description of this throwable.

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.

final Class<?> 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

AssertionError

Added in API level 1
public AssertionError ()

Constructs an AssertionError with no detail message.

AssertionError

Added in API level 1
public AssertionError (boolean detailMessage)

Constructs an AssertionError with its detail message derived from the specified boolean, which is converted to a string as defined in section {@jls 5.1.11} of The Java Language Specification.

Parameters
detailMessage boolean: value to be used in constructing detail message

AssertionError

Added in API level 1
public AssertionError (char detailMessage)

Constructs an AssertionError with its detail message derived from the specified char, which is converted to a string as defined in section {@jls 5.1.11} of The Java Language Specification.

Parameters
detailMessage char: value to be used in constructing detail message

AssertionError

Added in API level 1
public AssertionError (double detailMessage)

Constructs an AssertionError with its detail message derived from the specified double, which is converted to a string as defined in section {@jls 5.1.11} of The Java Language Specification.

Parameters
detailMessage double: value to be used in constructing detail message

AssertionError

Added in API level 1
public AssertionError (float detailMessage)

Constructs an AssertionError with its detail message derived from the specified float, which is converted to a string as defined in section {@jls 5.1.11} of The Java Language Specification.

Parameters
detailMessage float: value to be used in constructing detail message

AssertionError

Added in API level 1
public AssertionError (int detailMessage)

Constructs an AssertionError with its detail message derived from the specified int, which is converted to a string as defined in section {@jls 5.1.11} of The Java Language Specification.

Parameters
detailMessage int: value to be used in constructing detail message

AssertionError

Added in API level 1
public AssertionError (Object detailMessage)

Constructs an AssertionError with its detail message derived from the specified object, which is converted to a string as defined in section {@jls 5.1.11} of The Java Language Specification.

If the specified object is an instance of Throwable, it becomes the cause of the newly constructed assertion error.

Parameters
detailMessage Object: value to be used in constructing detail message

AssertionError

Added in API level 19
public AssertionError (String message, 
                Throwable cause)

Constructs a new AssertionError with the specified detail message and cause.

Note that the detail message associated with cause is not automatically incorporated in this error's detail message.

Parameters
message String: the detail message, may be null

cause Throwable: the cause, may be null

AssertionError

Added in API level 1
public AssertionError (long detailMessage)

Constructs an AssertionError with its detail message derived from the specified long, which is converted to a string as defined in section {@jls 5.1.11} of The Java Language Specification.

Parameters
detailMessage long: value to be used in constructing detail message