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If you say so. Besides, I was talking about Container con, not Connection conn. 'con' shouldn't need initializing as long as 'jf' has been.

Somewhere in the method addComponents() is a reference...

Respect Java's naming conventions and name your classes with capital letters.

Where is the variable 'con' initialized?

Is that a question or a statement with a misplaced question mark?

If you want help, post the code and the error/stack trace exactly as it occurs at your end, copied and pasted.