class - Does Java guarantee that Object.getClass() == Object.getClass()?

Question

I really do mean identity-equality here.

For example, will the following always print true?

System.out.println("foo".getClass() == "fum".getClass());

question from:https://stackoverflow.com/questions/3738919/does-java-guarantee-that-object-getclass-object-getclass

Answer 1

Yes, class tokens are unique (for any given classloader, that is).

I.e. you will always get a reference to the same physical object within the same classloader realm. However, a different classloader will load a different class token, in conjunction with the fact that the same class definition is deemed different when loaded by two distinct classloaders.

See this earlier answer of mine for a demonstration of this.