如何设置Java默认按钮在ENTER键_released_上做出反应？

问题描述

在我的应用程序中，我使用默认按钮。 ENTER Key is release 。 $ ENTER 键是 。

我删除了 KeyStroke 从 InputMap 的按钮。但它对我来说并不奏效我应该怎么做？

---

  import javax.swing。*; 
 import java.awt。*; 
 import java.awt.event.ActionEvent; 
 
 public class ButtonTest {
 public static void main（String [] args）{
 EventQueue.invokeLater（new Runnable（）{
 @Override 
 public void run（）{
 buildFrame（）; 
} 
}）; 
} 
 
 private static void buildFrame（）{
 JFrame f = new JFrame（Test）; 
 f.setDefaultCloseOperation（WindowConstants.EXIT_ON_CLOSE）; 
 
 JButton button = new JButton（new AbstractAction（Button）{
 @Override 
 public void actionPerformed（ActionEvent e）{
 System.out.println ButtonTest :: actionPerformed：CALLED）; 
} 
}）; 
 
 JButton button2 = new JButton（Button 2）; 
 InputMap im = button.getInputMap（）; 
 im.put（KeyStroke.getKeyStroke（ENTER），none）; 
 im.put（KeyStroke.getKeyStroke（released ENTER），released）; 
 
 f.setLayout（new GridBagLayout（））; 
 f.add（button）; 
 f.add（button2）; 
 f.getRootPane（）。setDefaultButton（button）; 
 
 f.pack（）; 
 f.setLocationRelativeTo（null）; 
 f.setVisible（true）; 
} 
} 
  

这是示例代码。

解决方案

  JRootPane rootPane = SwingUtilities.getRootPane（/ *您的JButton * /）; 
 rootPane.setDefaultButton（/ *您的JButton * /）; 
  

In my application I use a Default button. I want it to react when ENTER Key is released. Not when ENTER Key is pressed.

I removed the KeyStroke from InputMap of the button. But it didn't work for me. How should i do that?

---

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

public class ButtonTest {
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                buildFrame();
            }
        });
    }

    private static void buildFrame() {
        JFrame f = new JFrame("Test");
        f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        JButton button = new JButton(new AbstractAction("Button") {
            @Override
            public void actionPerformed(ActionEvent e) {
                System.out.println("ButtonTest::actionPerformed: CALLED");
            }
        });

        JButton button2 = new JButton("Button 2");
        InputMap im = button.getInputMap();
        im.put(KeyStroke.getKeyStroke("ENTER"), "none");
        im.put(KeyStroke.getKeyStroke("released ENTER"), "released");

        f.setLayout(new GridBagLayout());
        f.add(button);
        f.add(button2);
        f.getRootPane().setDefaultButton(button);

        f.pack();
        f.setLocationRelativeTo(null);
        f.setVisible(true);
    }
}

This is the sample code.

解决方案

JRootPane rootPane = SwingUtilities.getRootPane(/* Your JButton  */);
rootPane.setDefaultButton(/* Your JButton  */);

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