JFrame 关闭按钮的弹出窗口
我正在做一些基本的 Java Swing 应用程序
(初级).我要做的是当我按下 JFrame 上的 close 按钮
来关闭我想要一个 JOptionPane 确认对话框
而不是直接关闭的窗口时
i am doing some basic Java Swing application
(beginner level) .
what i have to do is when i press close button on JFrame
to colse the window i want a JOptionPane Confirm Dialog
instead of straightforward close
这里是代码 JFrame
here is the code JFrame
JFrame frame= new JFrame("frame");
frame.setSize(300,300);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
frame.pack();
JOptionPane 代码是这样的
and JOptionPane code goes like this
final JOptionPane optionPane = new JOptionPane("Are You sure?",JOptionPane.QUESTION_MESSAGE,
JOptionPane.YES_NO_OPTION);
所以当按下 JFrame 上的关闭按钮时,这个弹出窗口应该出现而不是直接关闭
请指导我如何做到这一点..提前谢谢
so when Close button on JFrame pressed this popup should come up instead of Direct closing
Please guide me how i can do it .. Thanks in advance
推荐答案
您可以按照以下步骤进行:
You can do it by following steps:
将
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
行替换为frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
实现 WindowListener
并覆盖其所有抽象方法.您可以在这里找到它.
Implement WindowListener
and override its all abstract methods. You can find it here.
以这种方式覆盖 public void windowClosing(WindowEvent e)
方法:
Override the public void windowClosing(WindowEvent e)
method some this way:
@Override
public void windowClosing(WindowEvent e){
int result = JOptionPane.showConfirmDialog(null, "Are you sure,"Confirm",JOptionPane.YES_NO_OPTION,JOptionPane.QUESTION_MESSAGE);
if(result == JOptionPane.YES_OPTION){
System.exit(0);
}else{
//Do nothing
}
}
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