求JAVA的show用法(显示另一个窗体)

public class ShowFrame extends JFrame implements ActionListener {
private JButton b;

private JPanel p;

public ShowFrame(String title) {
super(title);

p = new JPanel();

b = new JButton(\"Show\");
b.addActionListener(this);

p.add(b);

getContentPane().add(p);
}

public void actionPerformed(ActionEvent e) {
new TempFrame(this);
}

public static void main(String[] args) {
ShowFrame f = new ShowFrame(\"ShowFrame\");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setSize(200,400);
f.setVisible(true);
}
}

class TempFrame extends JDialog {
public TempFrame(ShowFrame f) {
super(f,\"Temp\",true);

setSize(100,100);
setVisible(true);
}
}