您如何将任何键绑定到Swing中的组件？按键绑定：按键绑定教程。
等一下，我看看您的代码…
例如
import java.awt.Component;import java.awt.event.ActionEvent;import java.awt.event.KeyEvent;import javax.swing.AbstractAction;import javax.swing.Action;import javax.swing.ActionMap;import javax.swing.BoxLayout;import javax.swing.ButtonGroup;import javax.swing.InputMap;import javax.swing.JComponent;import javax.swing.Jframe;import javax.swing.JRadioButton;import javax.swing.KeyStroke;import javax.swing.SwingUtilities;public class RadioButtonSelectableByNumbers { private Jframe frame; private JRadioButton buttons[]; private ButtonGroup group; public RadioButtonSelectableByNumbers() { } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { @Override public void run() { new RadioButtonSelectableByNumbers().createAndShowGui(); } }); } public void createAndShowGui() { frame = new Jframe("frame"); frame.setDefaultCloseOperation(Jframe); buttons = new JRadioButton[5]; group = new ButtonGroup(); frame.getContentPane().setLayout(new BoxLayout(frame.getContentPane(), BoxLayout.PAGE_AXIS)); for (int i = 0; i < buttons.length; i++) { JRadioButton rbtn = createButton(i); buttons[i] = rbtn; frame.getContentPane().add(rbtn); } frame.pack(); frame.setVisible(true); } private JRadioButton createButton(int i) { String name = String.valueOf(i + 1); int stdMnemonic = KeyEvent.VK_1 + i; // for standard number keys int numpadMnemonic = KeyEvent.VK_NUMPAD1 + i; // for numpad number keys Action action = new CustomAction(name, stdMnemonic); JRadioButton rBtn = new JRadioButton(action); group.add(rBtn); // bindings active if window is focused. Component doesn't have to be focused int condition = JComponent.WHEN_IN_FOCUSED_WINDOW; InputMap inputMap = rBtn.getInputMap(condition); ActionMap actionMap = rBtn.getActionMap(); KeyStroke keyStroke = KeyStroke.getKeyStroke(stdMnemonic, 0); KeyStroke keyStroke2 = KeyStroke.getKeyStroke(numpadMnemonic, 0); inputMap.put(keyStroke, keyStroke.toString()); actionMap.put(keyStroke.toString(), action); inputMap.put(keyStroke2, keyStroke2.toString()); actionMap.put(keyStroke2.toString(), action); return rBtn; } class CustomAction extends AbstractAction { public CustomAction(String name, Integer mnemonic, Integer modifier) { super(name); putValue(ACCELERATOR_KEY, KeyStroke.getKeyStroke(mnemonic, modifier)); } public CustomAction(String name, Integer mnemonic) { super(name); putValue(MNEMONIC_KEY, mnemonic); } @Override public void actionPerformed(ActionEvent e) { System.out.println("radio clicked: " + e.getActionCommand()); } }}因为通常JRadioButton不使用ActionListeners，所以另一种可能更好的解决方案是创建一个简单地单击按钮的AbstractAction。在下面的示例中，MyAction会执行此操作，并为活动的JRadioButton提供焦点：
import java.awt.GridLayout;import java.awt.event.ActionEvent;import java.awt.event.ItemEvent;import java.awt.event.ItemListener;import java.awt.event.KeyEvent;import javax.swing.*;@SuppressWarnings("serial")public class NumberActions extends JPanel { private ButtonGroup buttonGroup = new ButtonGroup(); public NumberActions() { ItemListener itemListener = new MyItemListener(); setLayout(new GridLayout(1, 0)); for (int i = 0; i < 10; i++) { JRadioButton rBtn = createRadioBtn(i); rBtn.addItemListener(itemListener); buttonGroup.add(rBtn); add(rBtn); } } private JRadioButton createRadioBtn(int i) { String text = String.valueOf(i); JRadioButton rBtn = new JRadioButton(text); rBtn.setActionCommand(text); int condition = JComponent.WHEN_IN_FOCUSED_WINDOW; InputMap inputMap = rBtn.getInputMap(condition); ActionMap actionMap = rBtn.getActionMap(); Action action = new MyAction(rBtn); bindAction(inputMap, actionMap, action, KeyEvent.VK_0 + i); bindAction(inputMap, actionMap, action, KeyEvent.VK_NUMPAD0 + i); return rBtn; } private void bindAction(InputMap inputMap, ActionMap actionMap, Action action, int mnemonic) { KeyStroke keyStroke = KeyStroke.getKeyStroke(mnemonic, 0); inputMap.put(keyStroke, keyStroke.toString()); actionMap.put(keyStroke.toString(), action); } private class MyItemListener implements ItemListener { @Override public void itemStateChanged(ItemEvent iEvt) { if (iEvt.getStateChange() == ItemEvent.SELECTED) { AbstractButton btn = (AbstractButton) iEvt.getSource(); System.out.println("Button: " + btn.getActionCommand()); } } } private class MyAction extends AbstractAction { private AbstractButton btn; public MyAction(AbstractButton btn) { this.btn = btn; } @Override public void actionPerformed(ActionEvent e) { btn.requestFocusInWindow(); btn.doClick(); } } private static void createAndShowGui() { NumberActions mainPanel = new NumberActions(); Jframe frame = new Jframe("NumberActions"); frame.setDefaultCloseOperation(Jframe.DISPOSE_ON_CLOSE); frame.getContentPane().add(mainPanel); frame.pack(); frame.setLocationByPlatform(true); frame.setVisible(true); } public static void main(String[] args) { SwingUtilities.invokeLater(() -> createAndShowGui()); }}编辑：代码固定
