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You can't just guess at the syntax. What type of Object does that method take? Do you have that type of Object available?

You should also think about other approaches: are you sure you want to...

First result for googling "java text components": Using Text Components (The Java™ Tutorials > Creating a GUI With JFC/Swing > Using Swing Components)

One thing at a time. Which part of this is giving you trouble? Do you know how to process an event from a button click? Do you know how to use a random generator? Do you know how to set the text of a...