How to swap two numbers in java programming

In this page you can see how to swap two numbers using the java programming.

METHOD-I

PROGRAM TO SWAP TWO NUMBERS IN FLOAT:

public class swaptwonumbers{

    public static void main(String args[]){

        float firstnumber=10.2f,secondnumber=9.7f;

        System.out.println("------BEFORE SWAP------");

        System.out.println("first number= "+firstnumber);

        System.out.println("second number= "+secondnumber);

        float temp;

        temp=firstnumber;

        firstnumber=secondnumber;

        secondnumber=temp;

        System.out.println("------AFTER SWAP------");

        System.out.println("first number = "+firstnumber);

        System.out.println("second number ="+secondnumber);

    }

}

OUTPUT:

------BEFORE SWAP------

first number= 10.2

second number= 9.7

------AFTER SWAP------

first number = 9.7

second number =10.2

METHOD-II

PROGRAM TO SWAP TWO NUMBERS IN INTEGER:

import java.util.Scanner;

public class swaptwonumbers{

    public static void main(String args[]){

        int firstnumber,secondnumber;

        Scanner sc=new Scanner( System.in);

        System.out.println("Enter the first number");

        firstnumber=sc.nextInt();

        System.out.println("Enter the second number");

        secondnumber=sc.nextInt();

        System.out.println("------BEFORE SWAP------");

        System.out.println("first number= "+firstnumber);

        System.out.println("second number= "+secondnumber);

        int temp;

        temp=firstnumber;

        firstnumber=secondnumber;

        secondnumber=temp;

        System.out.println("------AFTER SWAP------");

        System.out.println("first number = "+firstnumber);

        System.out.println("second number ="+secondnumber);

    }

}

OUTPUT:

Enter the first number

3

Enter the second number

9

------BEFORE SWAP------

first number= 3

second number= 9

------AFTER SWAP------

first number = 9

second number =3