The logic that can be implemented for this program is as follow:
Step1: Concatenate both strings and store them in the first variable. Ex. s1 = s1 + s2
Step2: s2 = s1.substring(0, s1.length() – s2.length());
Step3: s1 = s1.substring(s2.length());
Solution
Let’s see the complete logic below:
SwapTwoString.java
package com.javacodepoint.programs;
public class SwapTwoString {
// Main method
public static void main(String[] args) {
// initializing two string variable
String s1 = "abc";
String s2 = "xyz123";
System.out.println("Before swap :: s1=>" + s1 + ", s2=>" + s2);
// step-1
s1 = s1 + s2;
// step-2
s2 = s1.substring(0, s1.length() - s2.length());
// step-3
s1 = s1.substring(s2.length());
System.out.println("After swap :: s1=>" + s1 + ", s2=>" + s2);
}
}
OUTPUT:
Before swap :: s1=>abc, s2=>xyz123
After swap :: s1=>xyz123, s2=>abc
