Can someone explain to me what the reasoning behind passing by “value” and not by “reference” in Java is?

Question

I\'m fairly new to Java (been writing other stuff for many years) and unless I\'m missing something (and I\'m happy to be wrong here) the following is a fatal flaw...

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Answer 1

Are you sure it prints null? I think it will be just blank as when you initialized the foo variable you provided empty String.

The assigning of foo in thisDoesntWork method is not changing the reference of the foo variable defined in class so the foo in System.out.println(foo) will still point to the old empty string object.