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我刚做了这个程序,我在面板上添加了一个按钮,但我无法继续使用actionListener来使按钮正常工作。他们应该是面板上出现的图片,当点击该按钮时,图片应该变成另一张图片。请帮助我,谢谢!这是我的代码。简单的GUI程序
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class DrawPanelThree extends JPanel
{
private JButton button;
public DrawPanelThree()
{
button = new JButton();
setLayout(new BorderLayout());
add(button, BorderLayout.SOUTH);
button.setText("Start");
}
protected void paintComponent(Graphics g)
{
super.paintComponent(g);
g.drawRect(90, 40, 100, 50);
g.setColor(Color.RED);
g.fillRect(10, 10, 10, 10);
g.fillRect(260, 10, 10, 10);
g.fillRect(10, 120, 10, 10);
g.fillRect(260, 120, 10, 10);
g.setColor(new Color(255, 215, 0));
g.fillOval(120, 45, 40, 40);
}
public static void main(String[] args)
{
JFrame frame = new JFrame();
frame.setTitle("Rectangle");
frame.setSize(new Dimension(300, 200));
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
DrawPanelThree panel = new DrawPanelThree();
frame.add(panel);
panel.setBackground(Color.CYAN);
frame.setVisible(true);
}
private class ButtonListener implements ActionListener
{
public void actionPerformed(ActionEvent event)
{
}
}
}