Java JCombobox 和 JButton 问题

Question

我目前正在从事我的计算机科学项目 class，但我遇到了问题。我有多个按钮和 2 个组合框，我希望它们彼此独立工作。不幸的是，每当我按下一个按钮时，它就像一个 "select" 按钮一样工作，并激活组合框中当前选择的任何内容！我将如何解决这个问题？下面是我的代码片段

public void actionPerformed(ActionEvent e) {
  // Sound Menu
  String soundSelect = (String)soundBox.getSelectedItem();
  int soundIndex = soundBox.getSelectedIndex();
    switch (soundIndex){
      case 0:
        stopClip(meowSong);
        stopClip(meowRemix);
        ImageIcon catDel = new ImageIcon(getClass().getResource("tres-quatro.png"));
        delEvent.setIcon(catDel);
        ImageIcon catAdd = new ImageIcon(getClass().getResource("im-hungry.png"));
        addEvent.setIcon(catAdd);
        break;
      case 1:
        stopClip(meowRemix);
        playMeow(meowSong);
        catDel = new ImageIcon(getClass().getResource("tres-quatro.png"));
        delEvent.setIcon(catDel);
        catAdd = new ImageIcon(getClass().getResource("im-hungry.png"));
        addEvent.setIcon(catAdd);
        break;
      case 2:
        stopClip(meowSong);
        playMeow(meowRemix);
        ImageIcon thugCat = new ImageIcon(getClass().getResource("tres-quatro-thug.png"));
        delEvent.setIcon(thugCat);
        ImageIcon hungryThug = new ImageIcon(getClass().getResource("im-hungry-thug.png"));
        addEvent.setIcon(hungryThug);
        break;
    }


  // View Menu
    String viewSelect = (String)viewTypes.getSelectedItem();
    if(e.getActionCommand().equals("ADD EVENT"))
    {
        playMeow(meowSound);
        createEvent();
      }else if(e.getActionCommand().equals("DELETE EVENT"))
        {
            playMeow(meowSound);
            deleteEvent();
        }else{
          panel.remove(displayMessage2);
          panel.add(displayMessage);
          panel.remove(text);
        }

    int selection = viewTypes.getSelectedIndex();
         switch (selection)
         {
          case 0: displayMessage.setText("Enter the Sunday of the week you'd like to view! DD/MM");
                  panel.add(text);
                  panel.add(enter);
                  String date = text.getText();
                  if(e.getActionCommand().equals("Enter")){
                    weeklyCalendar(calendar.getHashmap(), date);
                    displayMessage.setText("Select a CATlendar view or you can ADD or DELETE an event!");
                    panel.remove(text);
                    panel.remove(enter);
                  }
                  break;
          case 1: displayMessage.setText("Enter the date you'd like to view! DD/MM");
                  panel.add(text);
                  panel.add(enter);
                  date = text.getText();
                  if(e.getActionCommand().equals("Enter")){
                    playMeow(meowSound);
                    dailyCalendar(calendar.getHashmap(), date);
                    displayMessage.setText("Select a CATlendar view or you can ADD or DELETE an event!");
                    panel.remove(text);
                    panel.remove(enter);
                  }
                  break;
        case 2: displayMessage.setText("Press Enter to view monthly");
                panel.remove(text);
                panel.add(enter);
                if(e.getActionCommand().equals("Enter")){
                  monthlyCalendar();
                  displayMessage.setText("Select a CATlendar view or you can ADD or DELETE an event!");
                  panel.remove(enter);
                }
                break;
           }

    panel.revalidate();
    panel.repaint();
    SwingUtilities.windowForComponent(panel).pack();
}

Answer 1

whenever I press a button it works as a "select" button and activates whatever is currently selected in the combobox

嗯，这就是您的 ActionListener 代码所做的。无论哪个组件生成 ActionEvent，您始终执行 switch 语句。

为每个组件创建单独的 ActionListener，而不是尝试为所有组件共享一个 ActionListener。然后代码将特定于每个组件，并且不需要 if 语句来确定哪个组件生成了事件。

编辑：

How can you have individual actionListeners for each component?

您可以创建一个实现 ActionListener 接口的内部 class

comboBox.addActionListener( new MyComboBoxListener() );

...

class MyComboBoxListener implements ActionListener
{
    @Override
    public void actionPerformed(ActionEvent e)
    {
        // add your code here
    }
}

你可以使用匿名内classes

comboBox.addActionListenener( new ActionListener()
{
    @Override
    public void actionPerformed(ActionEvent e)
    {
        // add your code here
    }
});

Java JCombobox 和 JButton 问题

Java JCombobox and JButton issue

java

user-interface

swing

awt