Java Swing 事件

Question

我想知道应该如何实现一个事件，该事件将在按下按钮时执行某些操作，并在释放按钮时停止执行该操作

我尝试为这种方法添加 MouseListerner。问题是它会识别出我按下了按钮。但不是它是哪个按钮。所以想知道应该如何编写它才能知道我按下了哪个按钮。

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

import javax.swing.*;


public class Main extends JFrame implements MouseListener, ActionListener{

    private JPanel panel1 = new JPanel();
    private JPanel panel2 = new JPanel(new GridLayout(4,4));



    public Main() {
        setSize(300,400);
        setVisible(true);
        setDefaultCloseOperation(EXIT_ON_CLOSE);

        setLayout(new BorderLayout());
        add(panel1, BorderLayout.NORTH);
        add(panel2, BorderLayout.CENTER);

        String[] buttonNamn = {"1","2","3","4","5","6","7","8","9","A","B","C","D","E","F"};

        for(int i=0;i<buttonNamn.length;i++) {
            JButton button = new JButton(buttonNamn[i]);
            panel2.add(button);
            button.addMouseListener(this);
            button.addActionListener(this);
        }

    }
    public static void createGUI() {
        new Main();
    }

    public static void main(String[] args) {

         createGUI();
    }
    @Override
    public void mouseClicked(MouseEvent arg0) {
        // TODO Auto-generated method stub

    }
    @Override
    public void mouseEntered(MouseEvent arg0) {
        // TODO Auto-generated method stub

    }
    @Override
    public void mouseExited(MouseEvent arg0) {
        // TODO Auto-generated method stub

    }
    @Override
    public void mousePressed(MouseEvent arg0) {
        System.out.println("Pressed");

    }
    @Override
    public void mouseReleased(MouseEvent arg0) {
        System.out.println("Relased");


    }
    @Override
    public void actionPerformed(ActionEvent e) {
        if(e.getActionCommand().equals("1")) {
            System.out.println("Foo 1");
        }
        else if(e.getActionCommand().equals("2")){
            System.out.println("Foo 2");
        }
    }
}

Answer 1

您将需要 invokeLater，如下所述:Java: mytextarea.setText("hello") + Thread.sleep(1000) = strange result否则您的操作将阻塞 UI 线程