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Multiple catch block


Java Multi catch block

If you have to perform different tasks at the occurrence of different Exceptions, use java multi catch block.

Let’s see a simple example of java multi-catch block.

  1. public class TestMultipleCatchBlock{
  2.   public static void main(String args[]){
  3.    try{
  4.     int a[]=new int[5];
  5.     a[5]=30/0;
  6.    }
  7.    catch(ArithmeticException e){System.out.println(“task1 is completed”);}
  8.    catch(ArrayIndexOutOfBoundsException e){System.out.println(“task 2 completed”);}
  9.    catch(Exception e){System.out.println(“common task completed”);}
  10.    System.out.println(“rest of the code…”);
  11.  }
  12. }
Output:task1 completed
       rest of the code...

Rule: At a time only one Exception is occured and at a time only one catch block is executed.

Rule: All catch blocks must be ordered from most specific to most general i.e. catch for ArithmeticException must come before catch for Exception .

  1. class TestMultipleCatchBlock1{
  2.   public static void main(String args[]){
  3.    try{
  4.     int a[]=new int[5];
  5.     a[5]=30/0;
  6.    }
  7.    catch(Exception e){System.out.println(“common task completed”);}
  8.    catch(ArithmeticException e){System.out.println(“task1 is completed”);}
  9.    catch(ArrayIndexOutOfBoundsException e){System.out.println(“task 2 completed”);}
  10.    System.out.println(“rest of the code…”);
  11.  }
  12. }

Output:

Compile-time error

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