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.
public class TestMultipleCatchBlock{
public static void main(String args[]){
try{
int a[]=new int[5];
a[5]=30/0;
}
catch(ArithmeticException e){System.out.println("task1 is completed");}
catch(ArrayIndexOutOfBoundsException e){System.out.println("task 2 completed");}
catch(Exception e){System.out.println("common task completed");}
System.out.println("rest of the code...");
}
}
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 .
class TestMultipleCatchBlock1{
public static void main(String args[]){
try{
int a[]=new int[5];
a[5]=30/0;
}
catch(Exception e){System.out.println("common task completed");}
catch(ArithmeticException e){System.out.println("task1 is completed");}
catch(ArrayIndexOutOfBoundsException e){System.out.println("task 2 completed");}
System.out.println("rest of the code...");
}
}
Output:
Compile-time error