在 JOptionPane 中设置默认关闭操作

Question

如何设置红色'X'按钮关闭应用程序？我知道如何在 JFrame 中执行此操作，但我不知道如何在 JOptionPane 中进行设置。

目前，单击红色 'X' 会初始化游戏，而不是退出应用程序。

JOptionPane.showMessageDialog(null, panel, "Let's Play!", JOptionPane.QUESTION_MESSAGE, icon);

Answer 1

使用 ConfirmDialog。根据操作，您会得到不同的值 (-1, 0, 1)。

int i = JOptionPane.showConfirmDialog(null, "Test", "test", JOptionPane.YES_NO_OPTION);
System.out.println(i);

"X" returns -1, "Yes" returns 0 和 "No" returns 1。现在可以根据数值选择是否开始游戏了

Answer 2

自己写JOptionDialog并观察结束事件：

import javax.swing.*;
import java.awt.event.*;

public class MyOwnCloseOption extends JOptionPane{

    //just to keep the names compliant
    public static String panel = "Your Message!";

    private Runnable closingRoutine;

    public MyOwnCloseOption(Runnable closingRoutine){
        super(panel, JOptionPane.QUESTION_MESSAGE);
        this.closingRoutine = closingRoutine;

    }

    public void showMessage(){
        JDialog dialog = createDialog("Let's Play!");
        dialog.addWindowListener(new WindowAdapter(){
            @Override
            public void windowClosing(WindowEvent e){
                closingRoutine.run();
            }
        });
        //From Documentation (Java SE7): java.awt.Dialog:
        //"setVisible(true): If the dialog is not already visible, this call will not return until the dialog is hidden by calling setVisible(false) or dispose"
        dialog.setVisible(true);
        dialog.dispose();
    }

    public static void main(String[] args){
        //The Original code
        //JOptionPane.showMessageDialog(null, panel, JOptionPane.QUESTION_MESSAGE);
        MyOwnCloseOption myOwnCloseOption = new MyOwnCloseOption(new Runnable(){
            @Override
            public void run(){
                System.out.println("Okay. -______-");
                System.exit(0);
            }
        });
        myOwnCloseOption.showMessage();
        System.out.println("Starting the Game!");
        //something keeps the application still alive?
        System.exit(0);
    }
}

在 JOptionPane 中设置默认关闭操作

Setting a default close action in JOptionPane

java

swing

joptionpane