java - JButton在我的Java代码中不起作用

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MouseListener doesn't appear to be working for me
                                
                                    （3个答案）
                                
                        
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我的鼠标单击不起作用。我尝试了不同的类型。
这是按钮类和显示类。我的项目中没有错误。但是鼠标不起作用。在这里，我在按钮类中实现了鼠标侦听器接口。然后我创建了一个按钮类对象，然后将ation侦听器添加到该按钮对象。


  按钮类别：

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;
    }

}

  显示类别：

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);
                }
            }
        });
    }



}

最佳答案

实现MouseListener接口不会使类使用MouseListener。

在这种情况下，您必须将MouseListener添加到Button中：

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);
}

关于java - JButton在我的Java代码中不起作用，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/40692812/