/*

* PROGRAM : To swap two string variables without using third variable

* FILE : StringSwap.java

* CREATED BY: Santosh Hembram

* DATED : 14-10-20

*/

import java.util.*;

class StringSwap {

public static void swap(String str1, String str2) {

str1 = str1 + str2;

str2 = str1.substring( 0,str1.length() - str2.length() );

str1 = str1.substring(str2.length() );

System.out.println("After swapping the string: ");

System.out.println("string 1: "+str1);

System.out.println("string 2: "+str2);

}

public static void main(String[] args) {

String str1,str2;

System.out.print("Enter the first string: ");

Scanner sc = new Scanner(System.in);

str1 = sc.nextLine();

System.out.print("Enter the second string: ");

str2 = sc.nextLine();

System.out.println("Display the string before swapping: ");

System.out.println("string 1: "+str1);

System.out.println("string 2: "+str2);

swap(str1,str2);

}

}