求一段代码

Question

当退出程序时，单击窗提右上角的关闭按钮，回提示是否推出程序．若选＂是＂则退出程序，若选＂否＂则不退出承袭．

Answer 1

JFrame首先设置setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
然后该JFrame添加WindowListener
addWindowListener(new WindowAdapter(){ public void windowClosing(WindowEvent e) {
if(JOptionPane.showConfirmDialog(e.getWindow(),"Are you sure to exit?","Confirm",JOptionPane.OK_CANCEL_OPTION) == JOptionPane.OK_OPTION){
System.exit(0);
}
else{

return;
}
}
});