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The compiler does a pretty darn good job of re-using Strings from memory, say for example within functions and objects (not to the extent that I'd trust == though). You can also 'force caching' using...

helloworlds response is much more eloquent than mine



Basically, if you ever assign an object to another using '=' instead of new, the == will evaluate to true for both assignees. In this...

Using the == operator on primitives is fine, but on objects is generally a bad idea if you wish to check content equality....this technique checks that the objects refer to the SAME object (aka the...