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What is an Exception Object?

Answer»

The exception object is an instance of a subclass of THROWABLE (e.g., java.lang. NullPointerException). It is only available on the error pages. The following table lists out the important methods available in the Throwable class: 

1public String getMessage()
Returns a detailed message about the exception that has occurred. This message is initialized in the Throwable constructor.
2public Throwable getCause()
Returns the cause of the exception as represented by a Throwable object.
3public String toString()
Returns the name of the class concatenated with the result of getMessage().
4public void printStackTrace()
PRINTS the result of toString() ALONG with the stack trace to System.err, the error output stream.
5public StackTraceElement [] getStackTrace()
Returns an array containing each element on the stack trace. The element at INDEX 0 represents the top of the call stack, and the last element in the array represents the method at the bottom of the call stack.
6public Throwable fillInStackTrace()
Fills the stack trace of this Throwable object with the CURRENT stack trace, adding to any previous information in the stack trace.


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