window.getContentPane().add(BorderLayout.NORTH,topPanel);
perhaps
window.getContentPane().add(topPanel, BorderLayout.NORTH);
I think the component is the first parameter in add...
...and:...
Type: Posts; User: jps
Re: Error: Invalid method declaration; return type required. Related to JFrames.
window.getContentPane().add(BorderLayout.NORTH,topPanel);
perhaps
window.getContentPane().add(topPanel, BorderLayout.NORTH);
I think the component is the first parameter in add...
...and:...
Re: Error: Invalid method declaration; return type required. Related to JFrames.
public GuessTheNumberButton(){
//...
return 0;
}
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