import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.*; public class JButton1_1 { JFrame f; public static void main(String argv[]) { new JButton1_1(); } public JButton1_1() { JFrame.setDefaultLookAndFeelDecorated(true); JDialog.setDefaultLookAndFeelDecorated(true); f=new JFrame("JButton1_1"); f.setBounds(0,0,400,300); f.setVisible(true); Container cp=f.getContentPane(); JButton b1=new JButton("確定"); cp.add(b1,BorderLayout.EAST); f.setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE); f.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { int result=JOptionPane.showConfirmDialog(f, "確定要結束程式嗎?", "確認訊息", JOptionPane.YES_NO_OPTION, JOptionPane.WARNING_MESSAGE); if (result==JOptionPane.YES_OPTION) {System.exit(0);} } }); } }