我正在开发一款游戏,我有一个JFrame,在输入中接收JTextField中的玩家名称。
我想要的是通过按JButton或按ENTER键关闭窗口的可能性。
当窗口打开时,JTextField必须具有焦点(光标应出现在组件中)。
我已经看到了:
How do you make key bindings for a java.awt.Frame?
How do you make key binding for a JFrame no matter what JComponent is in focus?
但我还没有解决问题,焦点管理可能有问题。
我尝试了以下代码:
public class PlayerNameWindow extends JFrame implements KeyListener {
private String playerName;
private JLabel backgroundLabel;
private JLabel enterNameLabel;
private JButton confirmButton;
private JTextField nameField;
private Image background;
public PlayerNameWindow() {
initComponents();
}
private void initComponents() {
backgroundLabel = new JLabel();
enterNameLabel = new JLabel();
confirmButton = new JButton();
nameField = new JTextField();
setDefaultCloseOperation(EXIT_ON_CLOSE);
setPreferredSize(new Dimension(400, 200));
setResizable(false);
getContentPane().setLayout(null);
addKeyListener(this);
enterNameLabel.setFont(new Font("Tahoma", 1, 18));
enterNameLabel.setForeground(new Color(255, 255, 255));
enterNameLabel.setText("Enter your name:");
getContentPane().add(enterNameLabel);
enterNameLabel.setBounds(40, 80, 160, 30);
confirmButton.setText("Confirm");
confirmButton.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent evt) {
confirmButtonMouseClicked(evt);
}
});
confirmButton.setBounds(160, 150, 90, 25);
getContentPane().add(confirmButton);
getContentPane().add(nameField);
nameField.setBounds(220, 80, 140, 30);
getContentPane().add(backgroundLabel);
backgroundLabel.setBounds(0, 0, 400, 200);
pack();
setLocationRelativeTo(null);
}
private void confirmButtonMouseClicked(MouseEvent evt) {
confirmAction();
}
private void confirmAction() {
playerName = nameField.getText();
System.exit(0);
}
public String getPlayerName() {
return this.playerName;
}
public void keyPressed(KeyEvent e) {
int code = e.getKeyCode();
if (code == KeyEvent.VK_ENTER)
System.exit(0);
}
public void keyReleased(KeyEvent e) {
//do-nothing
}
public void keyTyped(KeyEvent e) {
//do-nothing
}
}
我该怎么办?
由于
答案 0 :(得分:1)
将keyListener添加到JTextField。在您的代码nameField.addKeyListener(this);