Stack Trace

Here is the example program modified to include a finally{} block. The catch{} for InputMismatchException has been removed. Now these exceptions cause a jump out of the try{} block directly to the finally{} block.

import java.util.* ;

public class FinallyPractice
{
  public static void main ( String[] a ) 
  {
    Scanner scan = new Scanner( System.in  );
    int    num=0, div=0 ;

    try
    { 
      System.out.print("Enter the numerator: ");
      num = scan.nextInt();
      System.out.print("Enter the divisor  : ");
      div = scan.nextInt();
      System.out.println( num + " / " + div + " is " + (num/div) + " rem " + (num%div) );
     } 
     catch (ArithmeticException ex )
     { 
      System.out.println("You can't divide " + num + " by " + div);
     } 
     finally
     { 
      System.out.println("If something went wrong, you entered bad data." );
     }
   }
}

If the user enters good data, the finally{} block is exectued:

Enter the numerator: 13
Enter the divisor  : 4
13 / 4 is 3 rem 1
If something went wrong, you entered bad data.

If the user enters bad data, the finally{} block is exectued, but the exception (due to the bad data) is passed up:

Enter the numerator: rats
If something went wrong, you entered bad data.
Exception in thread "main" java.util.InputMismatchException
        at java.util.Scanner.throwFor(Unknown Source)
        at java.util.Scanner.next(Unknown Source)
        at java.util.Scanner.nextInt(Unknown Source)
        at java.util.Scanner.nextInt(Unknown Source)
        at FinallyPractice.main(FinallyPractice.java:13)