Why returns getPassword() from the Object JPasswordField an char[]?

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Why is char[] preferred over String for passwords? 17 answers

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Well. The point is, that the lifecycle of a String is a little bit special. All Strings are stored in a String Pool. When the reference is lost (dereferencing) for example when you say String = null; the String is still alive in the internal string pool (and can be accessed in a kind of way I don't know). That's the reason why passwords are stored in char[]. Since these objects are 'normal'.

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