用Java更新绑定的JLabel文本

Question

我正在使用IntelliJ IDEA的表单编辑器，并将JLabel绑定到我的mouse_input类。我的目标是在表单上获取鼠标的x和y坐标并将它们打印到标签上。一切进展顺利，我的代码总体上可以正常工作，我可以将JLabel文本设置为x和y的值，但是在加载表单时只能设置一次。我一辈子都无法弄清楚如何在表单加载后定期更新值。我是Java和IntelliJ的新手，所以我很可能会缺少一些简单的东西。这是我的代码。

package com.company;

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

import static javax.swing.JFrame.*;

public class mouse_input {
    private JPanel mouse_pad;
    private JLabel label;

    private static int x;
    private static int y;

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable(){
            public void run(){
                displayJframe();
            }
        });

    }
    static void displayJframe(){
        // Create blank content frame
        JFrame frame = new JFrame("Mouse Input");
        frame.setContentPane(new mouse_input().mouse_pad);
        frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
        frame.pack();
        frame.validate();

        // Add mouse motion listener
        frame.addMouseMotionListener(new MouseMotionListener() {
            @Override
            public void mouseDragged(MouseEvent e) {
                // It doesn't like me deleting this
            }

            @Override
            public void mouseMoved(MouseEvent e) {
                x = e.getX();
                y = e.getY();
                frame.revalidate();
            }
        });

        // Set cursor type
        frame.setCursor(new Cursor(Cursor.CROSSHAIR_CURSOR));

        // Display frame
        frame.setVisible(true);
    }

    private void createUIComponents() {
        label = new JLabel();
        label.setText("X" + x + "Y" + y);
    }
}

现在，我已经进行了一些研究并进行了研究，发现我可以从头开始创建JLabel，但是我真的很想尝试看看是否可以单独使用IntelliJ的gui编辑器，但是我什么也没看到这种性质的周围。再说一次，我可能只是个白痴。我会很感激任何反馈。

Answer 1

从新的应用程序开始

private static void createAndShowGUI() {
    //Make sure we have nice window decorations.
    JFrame.setDefaultLookAndFeelDecorated(true);

    //Create and set up the window.
    JFrame frame = new JFrame("HelloWorldSwing");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    //Add the ubiquitous "Hello World" label.
    JLabel label = new JLabel("Hello World");
    frame.getContentPane().add(label);

    //Display the window.
    frame.pack();
    frame.setVisible(true);

 // Add mouse motion listener
    frame.addMouseMotionListener(new MouseMotionListener() {
        @Override
        public void mouseDragged(MouseEvent e) {
            // It doesn't like me deleting this
        }

        @Override
        public void mouseMoved(MouseEvent e) {
            int x = e.getX();
            int y = e.getY();
            label.setText("X" + x + "Y" + y);
            frame.revalidate();
        }
    });

}

public static void main(String[] args) {
    //Schedule a job for the event-dispatching thread:
    //creating and showing this application's GUI.
    javax.swing.SwingUtilities.invokeLater(new Runnable() {
        public void run() {
            createAndShowGUI();
        }
    });
}

贷方https://examples.javacodegeeks.com/desktop-java/swing/java-swing-application-example/