JButton with actionPerformed and keyReleased

Question

我有一个JButton，我希望它在按下按钮时执行某些操作，并且当按下某个按键时我希望它做同样的事情，我该怎么做？

Answer 1

做某事时按下按钮，您应该添加一个ActionListener到该按钮是这样的：

JButton button = new JButton(); 
button.addActionListener(new ActionListener() { 

    @Override 
    public void actionPerformed(ActionEvent arg0) { 
     // TODO Auto-generated method stub 

    } 
}); 

并以响应按键做这样的事情：（例如，如果用户输入控制ALT 7 ）

Action actionListener = new AbstractAction() { 
    public void actionPerformed(ActionEvent actionEvent) { 
    JButton source = (JButton) actionEvent.getSource(); 
    System.out.println("Activated: " + source.getText());// just for test 
    } 
}; 
//..... 

KeyStroke controlAlt7 = KeyStroke.getKeyStroke("control alt 7"); 
InputMap inputMap = button.getInputMap(); 
inputMap.put(controlAlt7, ACTION_KEY); 
ActionMap actionMap = button.getActionMap(); 
actionMap.put(ACTION_KEY, actionListener); 

Answer 2

据我所知（与Swing在几年...），可以在一个按钮动作的唯一按键事件是Tab从而改变了元素焦点，Enter没有搞砸哪触发actionPerformed方法和助记符，这也引发actionPerformed。

来处理按钮点击事件，你可以不喜欢这样：

button.addActionListener(new ActionListener() { 

      public void actionPerformed(ActionEvent e) 
      { 
       //Execute when button is pressed 
      } 
     }); 

Answer 3

JButton button = new JButton("Submit"); 
    //Add action listener to button 
    button.addActionListener(new ActionListener() { 

     public void actionPerformed(ActionEvent e) 
     { 
      //Execute when button is pressed 
      //do your work here 
      System.out.println("You clicked the submit button"); 
     } 
    });  

这是如何使用的ActionListener与JButton的

Answer 4

你可能想看看进入Action API。你可以在How to Use Actions看到更多。您可以使用Action作为按钮（与ActionListener一样工作），并且您可以向其添加快捷键。

您可以看到this example其中的快捷键被添加到工具栏按钮以及菜单项。你想要注意的有趣的事情是菜单项和工具栏按钮共享Action，因此做同样的事情。

Answer 5

试试这个：

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

public class EventedButtonExample extends JFrame { 
    private JButton simpleButton; 
    private static final long serialVersionUID = 42L; 

    public static void main(String[] args) { 
     SwingUtilities.invokeLater(new Runnable() { 
      public void run() { 
       EventedButtonExample me = new EventedButtonExample(); 
       me.initialize(); 
       me.setVisible(true); 
      } 
     }); 
    } 

    void initialize() { 
     simpleButton = new JButton("I am an simple, evented button!"); 
     CompoundEventHandler eh = new CompoundEventHandler(); 
     simpleButton.addActionListener(eh); 
     simpleButton.addKeyListener(eh); 
     getContentPane().add(simpleButton, BorderLayout.CENTER); 
     pack(); 
    } 

    class CompoundEventHandler extends KeyAdapter implements ActionListener { 
     public void keyReleased(KeyEvent e) { 
      int keyCode = e.getKeyCode(); 
      System.out.println("Key pressed: " + keyCode + " (" + KeyEvent.getKeyText(keyCode) + ")"); 
     } 

     public void actionPerformed(ActionEvent e) { 
      System.out.println("A button is pressed!"); 
     } 
    } 
}