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 Core Java  |  Question 417 of 493    Print  
Explain briefly about exception hierarchy in Java?

  
Total Answers and Comments: 2 Last Update: February 14, 2008     Asked by: Yogesh 
  
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August 03, 2007 03:08:57   #1  
sujatham Member Since: January 2006   Contribution: 142    
RE: Explain briefly about exception hierarchy in Java?...
Object class is the super  class for all the java classes.
Exceptions in Java are objects. All exceptions are derived from the java.lang. Throwable class.The two main subclasses Exception and Error constitute the main categories of throwables, the term used to refer to both exceptions and errors.
Again Exception class is super  class for checked Exceptions  and Runtime Exceptions.Except for RuntimeException, Error, and their subclasses, all exceptions are called checked exceptions. The compiler ensures that if a method can throw a checked exception, directly or indirectly, then the method must explicitly deal with it. The method must either catch the exception and take the appropriate action, or pass the exception on to its caller.Exceptions defined by Error and RuntimeException classes and their subclasses are known as unchecked exceptions, meaning that a method is not obliged to deal with these kinds of exceptions
They are either irrecoverable (exemplified by the Error class) and the program should not attempt to deal with them, or they are programming errors (examplified by the RuntimeException class) and should be dealt with as such and not as exceptions.


 
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February 14, 2008 23:59:06   #2  
sampra Member Since: February 2008   Contribution: 279    
RE: Explain briefly about exception hierarchy in Java?
object--throwble---error/exception
 
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