import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.*; public class JButton7_1 { JFrame f; JButton b1,b2,b3,b4,b5; public static void main(String argv[]) { new JButton7_1(); } public JButton7_1() { JFrame.setDefaultLookAndFeelDecorated(true); JDialog.setDefaultLookAndFeelDecorated(true); f=new JFrame("JButton7_1"); f.setSize(300,200); f.setLocationRelativeTo(null); f.setVisible(true); Container cp=f.getContentPane(); cp.setLayout(new FlowLayout(FlowLayout.LEFT)); b1=new JButton("按鈕 1"); b2=new JButton("按鈕 2"); b3=new JButton("按鈕 3"); b4=new JButton("按鈕 4"); b5=new JButton("按鈕 5"); cp.add(b1); cp.add(b2); cp.add(b3); cp.add(b4); cp.add(b5); 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);} } }); } }