Java 是否将事件添加到操作侦听器而不删除默认操作？

我想这样做，当我关闭我的GUI时，它将在我的主类中运行一个方法，但之后也会关闭

---

如果您正在使用Java Swing，请提供帮助，谢谢

：

    JFrame frame = new JFrame();
    frame.setTitle("Project Planner");
    frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
    frame.addWindowListener(new WindowAdapter() {
        @Override
        public void windowClosing(WindowEvent event) {
            exitProcedure();
        }
    });

---

只需在dispose方法之前添加您想要执行的操作。

尝试在GUI的

addWindowListener（）

方法中实现

WindowAdapter

。

为此，您需要将

WindowListener

注册到相关的

JFrame

。并重写

windowClosing（）

方法

EDIT
要从字符串数组中随机选择字符串，可以使用API。例如，这里有一个

String

数组，每次关闭

JFrame

时，都会从该数组中随机选择一个

字符串，并在
callmebeforexit
方法中打印出来

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.SwingUtilities;
import java.awt.event.WindowEvent;
import java.awt.event.WindowAdapter;
import java.awt.BorderLayout;
import java.util.Random;
class WorkBeforeClose extends  JFrame
{
    String[] strings = {
                            "Hello",
                            "World",
                            "Java",
                            "OOPs"
                        };
    public void showGUI()
    {
        setTitle("Close me");
        getContentPane().add(new JLabel("Close me"),BorderLayout.NORTH);
        addWindowListener(new WindowAdapter()
        {
            @Override
            public void windowClosing(WindowEvent evt)
            {
                callMeBeforeExit();
                System.exit(0);//Don't write this line if you don't want your program to exit
            }
        });
        setSize(200,200);
        setVisible(true);
    }
    private void callMeBeforeExit()
    {
        Random random = new Random();
        int i = random.nextInt(strings.length - 1);//Defines the Range of numbers to be chosen randomly.
        System.out.println(strings[i]);
    }
    public static void main(String st[])
    {
        SwingUtilities.invokeLater(new Runnable()
        {
            public void run()
            {
                WorkBeforeClose wbc = new WorkBeforeClose();
                wbc.showGUI();
            }
        });
    }
}

另一个问题是，我希望随机选取一个字符串，然后将其放入system.out.println？我该怎么做，thanks@JoshuaBaron您将这些
字符串
存储在
字符串
的
数组
中？@JoshuaBaron:观看编辑后的答案。
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.SwingUtilities;
import java.awt.event.WindowEvent;
import java.awt.event.WindowAdapter;
import java.awt.BorderLayout;
import java.util.Random;
class WorkBeforeClose extends  JFrame
{
    String[] strings = {
                            "Hello",
                            "World",
                            "Java",
                            "OOPs"
                        };
    public void showGUI()
    {
        setTitle("Close me");
        getContentPane().add(new JLabel("Close me"),BorderLayout.NORTH);
        addWindowListener(new WindowAdapter()
        {
            @Override
            public void windowClosing(WindowEvent evt)
            {
                callMeBeforeExit();
                System.exit(0);//Don't write this line if you don't want your program to exit
            }
        });
        setSize(200,200);
        setVisible(true);
    }
    private void callMeBeforeExit()
    {
        Random random = new Random();
        int i = random.nextInt(strings.length - 1);//Defines the Range of numbers to be chosen randomly.
        System.out.println(strings[i]);
    }
    public static void main(String st[])
    {
        SwingUtilities.invokeLater(new Runnable()
        {
            public void run()
            {
                WorkBeforeClose wbc = new WorkBeforeClose();
                wbc.showGUI();
            }
        });
    }
}