Why I can not change the width of a jbutton?

I have a JPanel,a JLabel and a JButton.
   panel.setLayout(new BorderLayout());
   panel.add(label,BorderLayout.CENTER);
   panel.add(button,BorderLayout.EAST);   I want to change the width of a jbutton.I use "button.setSize(...)",but it can't work.
What i do wrong? How to change the width of a jbutton?

Thank es5f2000 for help! I have solved the problem.

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http://blogs.technet.com/b/patrickr/archive/2010/07/28/windows-7-connectivity-problems-in-public-hotspots.aspx
Kate Li
TechNet Community Support

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