java - 如何更改 JComboBox 和 JButton 的默认输入

Question

如何让 Enter 键触发 GUI 中的 JComboBox 或 JButton，而不必按空格键？我有各种各样的文本字段和复选框，中间有按钮和组合框。我希望避免在按空格键和 Enter 键之间切换，而只需按 Enter 键即可访问所有组件。

package koning.personal.dungeonsanddragons;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class test {

JFrame window = new JFrame("testGUI");
JPanel windowPanel = new JPanel();

public static JLabel labelSize;
public static JComboBox<String> comboSize;

public static JLabel labelButton;
public static JButton buttonButton;

public test () {
    super();

    labelSize = new JLabel("Monster Size:");
    String[] sizeChoices = { "None", "Tiny", "Small", "Medium", "Large", "Huge", "Colossal"};
    comboSize = new JComboBox<String>(sizeChoices);
    comboSize.setToolTipText("The creature's size.");

    labelButton = new JLabel("Button:");
    buttonButton = new JButton();

    windowPanel.setLayout(new FlowLayout());
    windowPanel.setComponentOrientation(ComponentOrientation.LEFT_TO_RIGHT);
    windowPanel.add(labelSize);
    windowPanel.add(comboSize);
    windowPanel.add(labelButton);
    windowPanel.add(buttonButton);
    windowPanel.setVisible(true);

    window.setSize(500, 500);
    window.setLayout(new FlowLayout());
    window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    window.setVisible(true);
    window.add(windowPanel);

    comboSize.addActionListener(handler);
    buttonButton.addActionListener(handler);
}

ActionHandler handler = new ActionHandler();
public class ActionHandler implements ActionListener {
    public void actionPerformed(ActionEvent eventFocus){
        if (eventFocus.getSource() == comboSize){
            buttonButton.requestFocusInWindow();
        }
        if (eventFocus.getSource() == buttonButton){
            comboSize.requestFocusInWindow();
        }
    }
}

@SuppressWarnings("unused")
public static void main(String[] args) {
    test GUITest = new test();
}

}

Answer 1

您可以添加一个KeyListener并执行doClick

JButton btn = new JButton();
    btn.addKeyListener(new KeyListener() {

        @Override
        public void keyTyped(KeyEvent e) {
            if(e.getKeyCode() == KeyEvent.VK_ENTER)
                btn.doClick();

        }

        @Override
        public void keyReleased(KeyEvent e) {
            // TODO Auto-generated method stub

        }

        @Override
        public void keyPressed(KeyEvent e) {
            // TODO Auto-generated method stub

        }
    });