[英]How to make JButton react to keypressed method?
我正在Netbeans中使用JFrame
Form制作一個簡單的鋼琴游戲,我希望能夠使用計算機鍵盤按鍵來控制JButtons
。 當我想使用ActionPerformed
方法並在“設計”選項中keypressed
時,它只允許我控制以前用鼠標單擊的按鈕。 其他按鈕不起作用。 我試圖通過自己編寫keypressed
來解決它,但是在這種情況下,當我按鍵盤鍵時什么也沒發生。
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
String soundName = "C.wav";
AudioInputStream audioInputStream = null;
try {
audioInputStream = AudioSystem.getAudioInputStream(new
File(soundName).getAbsoluteFile());
} catch (UnsupportedAudioFileException | IOException ex) {
Logger.getLogger(GameWindow.class.getName()).log(Level.SEVERE, null, ex);
}
Clip clip = null;
try {
clip = AudioSystem.getClip();
} catch (LineUnavailableException ex) {
Logger.getLogger(GameWindow.class.getName()).log(Level.SEVERE, null, ex);
}
try {
clip.open(audioInputStream);
} catch (LineUnavailableException | IOException ex) {
Logger.getLogger(GameWindow.class.getName()).log(Level.SEVERE, null, ex);
}
clip.start();
}
public void keyPressed(KeyEvent evt){
int keyCode = evt.getKeyCode();
if (keyCode == KeyEvent.VK_Z) {
jButton1.getModel().isPressed();
}
if (keyCode == KeyEvent.VK_S) {
jButton2.getModel().isPressed();
}
}
您可以使用Swing鍵綁定實現此目的。 請嘗試以下示例。 使用InputMap和ActionMap是此示例的重點。
import javax.swing.*;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
public class ClickButtonsThroughKeyboard
{
private static Action buttonOneClickAction = new ButtonOneClickAction();
private static Action buttonTwoClickAction = new ButtonTwoClickAction();
public static void main(String[] args)
{
JButton button1 = new JButton("One");
button1.addActionListener(buttonOneClickAction);
button1.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke('z'), "z_typed");
button1.getActionMap().put("z_typed", buttonOneClickAction);
JButton button2 = new JButton("Two");
button2.addActionListener(buttonTwoClickAction);
button2.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke('s'), "s_typed");
button2.getActionMap().put("s_typed", buttonTwoClickAction);
JFrame f = new JFrame("Click Button Programmatically");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.getContentPane().setLayout(new FlowLayout());
f.getContentPane().add(button1);
f.getContentPane().add(button2);
f.setBounds(300, 200, 400, 300);
f.setVisible(true);
}
}
class ButtonOneClickAction extends AbstractAction
{
@Override
public void actionPerformed(ActionEvent e)
{
System.out.println("Button One clicked");
}
}
class ButtonTwoClickAction extends AbstractAction
{
@Override
public void actionPerformed(ActionEvent e)
{
System.out.println("Button Two clicked");
}
}
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