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

Jj Tuibeo's solution works if you add replaceFirst() and use a regular expression:

a += b;
b = a.replaceFirst(b + "$", "");
a = a.replaceFirst("^" + b, "");