Suppose you are planning to design a highly structured programming language, meant to be used in a team environment. You would make sure to have support for private state, which other objects couldn't see -- right?
Would you then go ahead, and add a really simple facility to your language that allowed you to turn off all those access controls?
Well, I'm not sure I would - but Java did. Which turns out to be really nice.
The above article describes how you can get access to private methods and fields. I was using this technique to help me track down a memory leak in a program I'm working on.
I simply kick off my application, open up a BeanShell console to it, and am free to peek inside things like static caches and such.
So nice of Java to offer this back door.
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