右键单击JButton

尝试将一个mouseAdapter添加到JButton以右键单击以标记该单元格。 问题是当我将它实例化到按钮上时，它不会让我。 也许是因为它上面已经有一个actionlistener？ 我不太确定。 任何帮助表示赞赏。 我正在创造一个扫雷游戏，fyi。

button = new JButton[size][size]; ButtonListener bl = new ButtonListener(); for (int r = 0; r < size; r++) { for (int c = 0; c < size; c++) { button[r][c] = new JButton(""); button[r][c].addActionListener(bl); button[r][c].addMouseListener (new MouseAdapter());`` // error message: cannot instantiate the type MouseAdapter panel.add(button[r][c]); 

最终如果有效，我想将其融入游戏中：

 button.addMouseListener(new MouseAdapter() { public void mouseClicked(MouseEvent e) { if (e.getButton() == 3) { // if right click button.setText("F"); button.getModel().setPressed(false); // button.setEnabled(true); } else { button.setText("X"); button.getModel().setPressed(true); // button.setEnabled(false); } } }); 

Answer 1

对于Minesweeper游戏，您需要寻找

1） JToggleButton

2）将Icon添加到JToggleButton方法

• JToggleButton#setIcon();

• JToggleButton#setSelectedIcon();

• JToggleButton#setDisabledIcon();

3）将MouseListener添加到JToggleButton

4）使用方法SwingUtilities.isRightMouseButton()覆盖mouseClicked

结果可能是

来自代码

 import java.awt.Insets; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import javax.swing.Icon; import javax.swing.JFrame; import javax.swing.JToggleButton; import javax.swing.SwingUtilities; import javax.swing.UIManager; public class MyToggleButton extends JFrame { private static final long serialVersionUID = 1L; private Icon errorIcon = UIManager.getIcon("OptionPane.errorIcon"); private Icon infoIcon = UIManager.getIcon("OptionPane.informationIcon"); private Icon warnIcon = UIManager.getIcon("OptionPane.warningIcon"); public MyToggleButton() { final JToggleButton toggleButton = new JToggleButton(); toggleButton.setBorderPainted(false); toggleButton.setBorder(null); toggleButton.setFocusable(false); toggleButton.setMargin(new Insets(0, 0, 0, 0)); toggleButton.setContentAreaFilled(false); toggleButton.setIcon((errorIcon)); toggleButton.setSelectedIcon(infoIcon); //toggleButton.setRolloverIcon((infoIcon)); //toggleButton.setPressedIcon(warnIcon); toggleButton.setDisabledIcon(warnIcon); toggleButton.addMouseListener(new MouseListener() { public void mouseClicked(MouseEvent e) { if (SwingUtilities.isRightMouseButton(e) && e.getClickCount() == 1) { if (toggleButton.isEnabled()) { toggleButton.setEnabled(false); } else { toggleButton.setEnabled(true); } } } public void mousePressed(MouseEvent e) { } public void mouseReleased(MouseEvent e) { } public void mouseEntered(MouseEvent e) { } public void mouseExited(MouseEvent e) { } }); add(toggleButton); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); pack(); setVisible(true); } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { @Override public void run() { MyToggleButton t = new MyToggleButton(); } }); } } 

Answer 2

MouseAdapter是一个抽象类，您无法创建它的实例。 这就是你得到错误的原因。

 button[r][c].addMouseListener (new MouseAdapter()); // this will not work button[r][c].addMouseListener (new MouseAdapter(){}); // this will ^ button[r][c].addMouseListener (new MouseAdapter(){ public void mouseClicked(MouseEvent e){ // and this will actually do sth. ; ) } });