JButton 在我的 java 代码中不起作用

Question

我的鼠标点击不起作用。我尝试了不同的类型。这是按钮 Class 和显示 Class。我的项目没有错误。但是鼠标不工作。在这里，我在按钮 class 中实现了鼠标监听器接口。然后我创建了一个按钮 class 对象，然后向该按钮对象添加了一个监听器。

Button Class:

import java.awt.Font;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

import javax.swing.JButton;

public class Button extends JButton implements MouseListener{

    private boolean click = false;

    public Button(String text) {
        super(text);
        setFont(new Font(null, Font.BOLD, 30));
        setText(text);
    }

    @Override
    public void mouseClicked(MouseEvent arg0) {
        click = true;
    }

    @Override
    public void mouseEntered(MouseEvent arg0) {

    }

    @Override
    public void mouseExited(MouseEvent arg0) {

    }

    @Override
    public void mousePressed(MouseEvent arg0) {

    }

    @Override
    public void mouseReleased(MouseEvent arg0) {

    }

    public boolean getClick() {
        return click;
    }

}

Display Class:

import java.awt.Toolkit;
import java.awt.event.ActionEvent;

import javax.swing.AbstractAction;
import javax.swing.JFrame;

import com.js.CandyThief.CustomButton.Button;


public class Display{

    private String title;
    private int width;
    private int height;

    private JFrame frame;

    Button btnPlay = new Button("Play");
    Button btnHelp = new Button("Help");
    Button btnCredits = new Button("Credits");
    public Button btnExit = new Button("Exit");


    public Display(String title, int width, int height){
        super();
        this.title = title;
        this.width = width;
        this.height = height;

        createDisplay();
    }
    private void createDisplay(){
        frame = new JFrame(title);
        frame.setSize(width, height);
        frame.setFocusable(true);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
        frame.setResizable(false);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        btnPlay.setBounds(300, 285, 450, 50);
        btnPlay.setBorderPainted(true);
        frame.add(btnPlay);

        btnHelp.setBounds(300, 350, 450, 50);
        btnHelp.setBorderPainted(true);
        frame.add(btnHelp);

        btnCredits.setBounds(300, 415, 450, 50);
        btnCredits.setBorderPainted(true);
        frame.add(btnCredits);

        btnExit.setBounds(300, 480, 450, 50);
        btnExit.setBorderPainted(true);
        frame.add(btnExit);

        Background background = new Background();
        frame.add(background);

        frame.setIconImage(Toolkit.getDefaultToolkit().getImage(getClass().getResource("/windowIcon.png")));

        btnExit.addActionListener(new AbstractAction() {

            @Override
            public void actionPerformed(ActionEvent arg0) {
                if (btnExit.getClick()) {
                    System.exit(0);
                }
            }
        });
    }



}

Answer 1

实现 MouseListener 接口不会使 class 使用 MouseListener。

在您的情况下，您必须将 MouseListener 添加到 Button：

http://docs.oracle.com/javase/7/docs/api/java/awt/Component.html#addMouseListener(java.awt.event.MouseListener)

public Button(String text) {
    super(text);
    setFont(new Font(null, Font.BOLD, 30));
    setText(text);
    addMouseListener(this);
}

Answer 2

Use JButton Direct if You are Using developing code with Swing no need to create Button Class Its already persent in javax.swing..

use
import javax.swing.*;

JButton btnPlay = new JButton("Play");
JButton btnHelp = new JButton("Help");
JButton btnCredits = new JButton("Credits");
JButton btnExit = new JButton("Exit");

Instead of this code..

Button btnPlay = new Button("Play");
Button btnHelp = new Button("Help");
Button btnCredits = new Button("Credits")
public Button btnExit = new Button("Exit");

JButton 在我的 java 代码中不起作用

JButton Not working in My java Code

java

mouseevent

jbutton

mouselistener