Using Scanner to get the value import java.util.Scanner; public class Swapnum { public static void main(String[] args) { Scanner sf = new Scanner (System.in); int a; System.out.print("Enter the Value of a : "); a=sf.nextInt(); int b; System.out.print("Enter the value of b : "); b=sf.nextInt(); a=a+b; b=a-b; a=a-b; System.out.println("value of a is :" +a); System.out.println("value of b is :" +b); } }