Home » Tip Bank » Java
  • Comment on this Article
Language: Java
Expertise: Intermediate
Mar 21, 2019
  • facebook
  • twitter
  • in
  • Email

WEBINAR:

On-Demand

Building the Right Environment to Support AI, Machine Learning and Deep Learning


Watch

Swapping Two Numbers

Swapping two numbers without using a new variable is always a good approach. This helps your application to be memory and performance oriented.

public class Swap2Numbers
{
   int firstNum = 10;
   int secondNum = 20;
   
   public static void main(String args[])
   {
      Swap2Numbers swap2Numbers = new Swap2Numbers();
      swap2Numbers.proceed();
   }
   
   private void proceed()
   {
      System.out.println("Before swapping... ");
      System.out.println("firstNum: " + firstNum);
      System.out.println("secondNum: " + secondNum);
      
      firstNum = firstNum + secondNum;
      secondNum = firstNum - secondNum;
      firstNum = firstNum - secondNum;

      System.out.println("\nAfter swapping... ");
      System.out.println("firstNum: " + firstNum);
      System.out.println("secondNum: " + secondNum);
      
   }
}

/*

Expected output:

[root@mypc]# java Swap2Numbers
Before swapping...
firstNum: 10
secondNum: 20

After swapping...
firstNum: 20
secondNum: 10

*/
M S Sridhar
 
Submit a Tip
Browse "Java" Tips
Browse All Tips
googlecode.com
htmlandcssbook.com