swap.java

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/**
 *
 * @author g1.test1
 */
import java.io.*;
public class swap {
 public static void main(String args[])throws Exception
 {
 BufferedReader i=new BufferedReader(new InputStreamReader(System.in));
 System.out.println("enter two numbers");
 int a=Integer.parseInt(i.readLine());
 int b=Integer.parseInt(i.readLine());
 System.out.println("before swap");
 System.out.println(a+" "+b);
 b=b-a;
 a=a+b;
 b=a-b;
 System.out.println("after swap");
 System.out.println(a+" "+b);
 }

}