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

You can also do this by using a temp variable but in a different way:

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

temp=a.concat(b);
b=temp.substring(0,a.length());
a=temp.substring(a.length(),temp.length());

System.out.println("After Swapping A:"+a+"B:"+b);