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Swapping of two numbers
This Java programming tutorial will teach you the methods for writing program to calculate swap of two numbers. Swapping is used where you want to interchange the values. This program will help you to increase your programming ability.

Swapping of two numbers

This Java programming tutorial will teach you the methods for writing program to calculate swap of two numbers. Swapping is used where you want to interchange the values. This program will help you to increase your programming ability.

In this program we will see how we can swap two numbers. We can do this by using a temporary variable which is used to store variable so that we can swap the numbers. To swap two numbers first we have to declare a class Swapping. Inside a class declare one static method swap(int i, int j) having two arguments, the value of these arguments will be swapped. Now declare one local variable temp which will help us to swap the values. At last call the main method inside of which you will call the swap method and the result will be displayed to you.

Code of the program is given below


public class Swapping{

  static void swap(int i,int j){

    int temp=i;

    i=j;

    j=temp;

    System.out.println("After
    swapping i = " + i + " j = " + j);

  }

  public static void main(String[] args){

    int i=1;

    int j=2;

     


        System.out.prinln("Before swapping
    i="+i+"  j="+j);

    swap(i,j);

     


  }

}

Output of this program is given below:

C:\java>java Swapping
Before swapping i = 1 j = 2
After swapping i = 2 j = 1

Download this example

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Current Comments

3 comments so far (post your own) View All Comments Latest 10 Comments:

Hi roseindia,
thanks for the requested solution also please send the code or program to swap two numbers
a)with temporary variables
b)without temporary variables

please kindly send the reply as soo as possible
thanking you
yours faithfully
deepika

Posted by deepika on Monday, 06.2.08 @ 14:23pm | #61804

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Actually Java passes method arguments by value.

So even though the value has changed in the method, after the return from that method, in the main function, the values of i and j will be the same.

Posted by Somaiah on Thursday, 03.27.08 @ 19:55pm | #54510

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assalam alaikum
oh thanks this site is gr8
becouse it help me in solving my assingment
thanks alot

Posted by Noor-ul-huda on Sunday, 02.18.07 @ 17:39pm | #8303

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