我在java，当F1键被击中JDialog窗口apear.My当前代码的东西：
public class Keyboard implements KeyListener {
private boolean[] keys = new boolean[120];
public boolean up, down, left, right, assets;
public void tick() {
assets = keys[KeyEvent.VK_F1];
}
public void keyPressed(KeyEvent e) {
keys[e.getKeyCode()] = true;
}
public void keyReleased(KeyEvent e) {
keys[e.getKeyCode()] = false;
}
public void keyTyped(KeyEvent e) {
}
}
在我的主类中，在ticch（）方法下：
keyboard.tick();
if(keyboard.assets) ac.run();
键盘变量指键盘类，而ac变量指此类：
public class AssetsChooser extends JDialog {
JFileChooser fc = new JFileChooser();
public void run() {
setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);
fc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
add(fc);
System.out.println("It works.");
}
}
当我运行游戏并点击F1时，不会出现JDialog窗口，控制台也不会显示该方法。
Swing中经常存在与KeyListener相关的焦点问题。如KeyListener教程中所述：
"要定义对特定键的特殊反应，请使用键绑定而不是键侦听器。有关详细信息，请参阅如何使用键绑定。"
一个例子（只需点击F1）：
import java.awt.event.*;
import javax.swing.*;
public class TestF1KeyBind {
public TestF1KeyBind() {
final JFrame frame = new JFrame("Frame");
JPanel panel = new JPanel();
InputMap im = panel.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
im.put(KeyStroke.getKeyStroke(KeyEvent.VK_F1, 0), "openDialog");
ActionMap am = panel.getActionMap();
am.put("openDialog", new AbstractAction() {
public void actionPerformed(ActionEvent e) {
JDialog dialog = new JDialog(frame, true);
dialog.setSize(300, 300);
dialog.setTitle("Dialog");
dialog.setLocationByPlatform(true);
dialog.setVisible(true);
}
});
frame.add(panel);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setSize(300, 300);
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new TestF1KeyBind();
}
});
}
}
