How to swap two string variables in Java without using a third variable

Question

How do I swap two string variables in Java without using a third variable, i.e. the temp variable?

String a = \"one\"
String b = \"two\"
String temp = null;
temp         


        

Answer 1

public class ex{
    public static void main(String[] args){

        String s1="abc";
        String s2="def";

        System.out.println(s1);
        System.out.println(s2);

        s3=s2.replaceAll(s1,s2=s1);

        System.out.println(s1);
        System.out.println(s2);

    }
}