What is the Problem With The Code

[O Shea]

Hello Everyone I am new at this Forum and I wanted to ask a question in this topic-> Exception Handling with Method Overriding in Java

There is a rule that-> If the superclass method declares an exception, subclass overridden method can declare same, subclass exception or no exception but cannot declare parent exception.

then why not this code is giving me Compile Time Error->

import java.io.*;  

class Parent{  

 void msg()throws ArrayIndexOutOfBoundsException{System.out.println("parent");}  

}  
 
class TestExceptionChild2 extends Parent{  

 void msg()throws IndexOutOfBoundsException{System.out.println("child");}  
 
 public static void main(String args[]){  

  Parent p=new TestExceptionChild2();  

  try{  

  p.msg();  

  }catch(Exception e){}  

 }  

}  



See I have made Parent Class method msg() to thorw ArrayIndexOutOfBounds Exception which is subclass of IndexOutOfBoundsException and in Derived Class method msg() I have thrown

IndexOutOFBoundsException which is parent of ArrayIndexOutOfBounds . Then why not the code giving me Compile Time Error. Please Help...

Thanks In Advance...

[Paul Anilprem]

Answered here: http://enthuware.com/forum/viewtopic.php?f=2&t=4360

[O Shea]

Thank you very much for your quick reply. Thank you

[O Shea]

One More Question-:>

Will Errors participate in Exception Propagation.
Since when I getting StackOverflowError in my program it dosen't giving me its Stack trace. It only showing that where error occur and not that who calls that exception method.

[Paul Anilprem]

R Sr wrote:One More Question-:>

Will Errors participate in Exception Propagation.
Since when I getting StackOverflowError in my program it dosen't giving me its Stack trace. It only showing that where error occur and not that who calls that exception method.

There is no difference between errors and exceptions with respect to propagation. Please post your code and the output that you have trouble understanding.

[O Shea]

class Error
{
	
   
   public static void main(String[] args)
   {
	   
	   try
	   {
	   new Error().go();
	   }
	   
	   catch(Error e)
	   {
		   System.out.println("CAUGHT AN ERROR");
		  
                   e.printStackTrace();
	   }
	   
   }
	  static void go()  //Say it is at line 27
	   {
		   go();
	   }
	  
}

 

Here output coming->   CAUGHT AN ERROR
                               
                                 java.lang.StackOverflowError
                        at Error.go(java:27)

   Now it is giving only Line 27 and not that method which calls it i.e, main method(It is not propagating from line 27 to main method who calls that code where exception occurs) . Why?