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explain AssertionError

 
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its output is :
output Exception in thread "main" java.lang.AssertionError
exception elld

can anybody tell me exception cant be caught in case assertionerror???
 
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Because AssertionError is not an Exception but an Error.

These are two different hierarchies:

Object - Throwable - Error - AssertionError

Object - Throwable - Exception.

Besides, AssertionError is actually to be used by the assert mechanism.
Check http://java.sun.com/j2se/1.4.2/docs/guide/lang/assert.html
 
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AssertionError is not an Exception but its a different class of Throwable called Error. That's why you cannot catch it using Exception. Well catch it using Error or Throwable.
 
vineet walia
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thanks
 
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also note that Errors need not be caught by us...... just like RuntimeException and it's subclasses.......
 
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