public class SwapStrings { public static void main(String[] args) { String str1 = "Good ", str2 = "morning "; System.out.println("Strings before swapping: " + str1 + " " + str2); //Concatenate both the string str1 and str2 and store it in str1 str1 = str1 + str2; //Extract str2 from updated str1 str2 = str1.substring(0, (str1.length() - str2.length())); //Extract str1 from updated str1 str1 = str1.substring(str2.length()); System.out.println("Strings after swapping: " + str1 + " " + str2); } }