下面的代码将添加 JButton 变成“空白” JFrame 每次鼠标在 JFrame . 这个 JButton 将放置在发生鼠标单击的位置。这个 JButton 文本将是一个数字。每个 JButton 将显示不同的数字。

import java.awt.Dimension;
import java.awt.EventQueue;

import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.ArrayList;
import java.util.List;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.WindowConstants;

public class AdButton extends MouseAdapter implements Runnable {
    private int  counter;
    private JFrame  frame;
    private JPanel  contentPane;

    public void mouseClicked(MouseEvent event) {
        int x = event.getX();
        int y = event.getY();
        JButton button = new JButton(String.valueOf(++counter));
        Dimension dim = button.getPreferredSize();
        button.setBounds(x, y, dim.width, dim.height);
        contentPane.add(button);
        contentPane.revalidate();
        contentPane.repaint();
    }

    @Override
    public void run() {
        showGui();
    }

    private void showGui() {
        frame = new JFrame();
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        contentPane = (JPanel) frame.getContentPane();
        contentPane.setLayout(null);
        contentPane.addMouseListener(this);
        frame.setSize(400, 450);
        frame.setLocationByPlatform(true);
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        EventQueue.invokeLater(new AdButton());
    }
}