Swap two strings in Java, by passing them to a utility function, but without returning objects or using wrapper classes

Question

I am trying to swap two strings in Java. I never really understood \"strings are immutable\". I understand it in theory, but I never came across it in practice.

Also

Answer 1

Java Strings are implemented with references, so you need to swap their references.

String s1 = "Hello";
String s2 = "World";
AtomicReference String1 = new AtomicReference(s1);
AtomicReference String2 = new AtomicReference(s2);
String1.set(String2.getAndSet(String1.get()));
System.out.println(String1 + " " + String2);

It will give you this output:

World Hello