Java Examples - Empty stack exception

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Problem Description:

How to handle the empty stack exception ?

Solution:

This example shows how to handle the empty stack exception by using s.empty(),s.pop() methods of Stack class and System.currentTimeMillis()method of Date class .

import java.util.Date;
import java.util.EmptyStackException;
import java.util.Stack;

public class ExceptionalTest {
   public static void main(String[] args) {
      int count = 1000000;
      Stack s = new Stack();
      System.out.println("Testing for empty stack");
      long s1 = System.currentTimeMillis();
      for (int i = 0; i <= count; i++)
      if (!s.empty())
         s.pop();
      long s2 = System.currentTimeMillis();
      System.out.println((s2 - s1) + " milliseconds");
      System.out.println("Catching EmptyStackException");
      s1 = System.currentTimeMillis();
      for (int i = 0; i <= count; i++) {
         try {
            s.pop();
         }
         catch (EmptyStackException e) {
         }
      }
      s2 = System.currentTimeMillis();
      System.out.println((s2 - s1) + " milliseconds");
   }
}

Result:

The above code sample will produce the following result.

Testing for empty stack
16 milliseconds
Catching EmptyStackException
3234 milliseconds


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