Java Jbutton KeyListener

我有一个3×3网格的jbuttons标记为1-9代表数字键盘。 我添加了一个actionlistener和keylistener，它们都调用相同的函数，所以如果他们点击btn1或在数字键盘上按1，就会发生同样的事情。

问题是当我在小键盘上按1时，我想看到btn1按下它，如果这是有意义的。

搜索没有引导我做任何事情，有没有名字？

Answer 1

使用：

• 键绑定API而不是KeyListener 。 密钥绑定唯一需要做的就是在相关按钮上调用doClick …
• 使用doClick以编程方式“单击”按钮

例如…

 import java.awt.EventQueue; import java.awt.GridLayout; import java.awt.Insets; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyEvent; import javax.swing.AbstractAction; import javax.swing.ActionMap; import javax.swing.InputMap; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.KeyStroke; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; /** * * @author shane */ public class Test { /** * @param args the command line arguments */ public static void main(String[] args) { new Test(); } public Test() { EventQueue.invokeLater(new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) { ex.printStackTrace(); } JFrame frame = new JFrame("Testing"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.add(new TestPane()); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } }); } public class TestPane extends JPanel { public TestPane() { setLayout(new GridLayout(3, 3)); add(createButton("1", KeyEvent.VK_NUMPAD1)); add(createButton("2", KeyEvent.VK_NUMPAD2)); add(createButton("3", KeyEvent.VK_NUMPAD3)); add(createButton("4", KeyEvent.VK_NUMPAD4)); add(createButton("5", KeyEvent.VK_NUMPAD5)); add(createButton("6", KeyEvent.VK_NUMPAD6)); add(createButton("7", KeyEvent.VK_NUMPAD7)); add(createButton("8", KeyEvent.VK_NUMPAD8)); add(createButton("9", KeyEvent.VK_NUMPAD9)); } protected JButton createButton(String name, int virtualKey) { JButton btn = new JButton(name); btn.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { System.out.println(e.getActionCommand() + " was clicked"); } }); btn.setMargin(new Insets(8, 8, 8, 8)); InputMap im = btn.getInputMap(WHEN_IN_FOCUSED_WINDOW); ActionMap am = btn.getActionMap(); im.put(KeyStroke.getKeyStroke(virtualKey, 0), "clickMe"); am.put("clickMe", new AbstractAction() { @Override public void actionPerformed(ActionEvent e) { JButton btn = (JButton) e.getSource(); btn.doClick(); } }); return btn; } } }