java - 向由另一个 JButton 创建的 JButton 添加操作

Question

我有一个 Jbutton，当按下它时会创建另一个按钮并将新按钮添加到面板中。如何向新按钮添加 actionListener？

例如:

JButton button = new JButton("lala");
button.addActionListener(this);

    public void actionPerformed(ActionEvent event)
      {
        if (event.getSource() == button)
        {
          JButton newButton = new JButton("ahah");
          newButton.addActionListener(this);
        }
       }

我想给 newButton 添加 Action ，我该怎么做？

编辑代码:

 public void actionPerformed(ActionEvent event)
  {
  if (event.getSource() == button)
    {
      String name = tfOne.getText();
      Icon flag = new ImageIcon("flag/"+name+".png");
      JButton[] newButton = new JButton[click]; 
      newButton[click-1] = new JButton(name, flag);
      p2.add(newButton[click-1]);
      newButton[click-1].addActionListener(new aListener());
      p2.setLayout(new GridLayout(5+click,1)); //p2 is a panel that has been created
      setSize(500,450+(click*20));

      click++; //number of times the button is pressed
    }
  }

  public class aListener extends MouseAdapter
  { 
    public void mouseClicked(MouseEvent e)
    {
      tfOne.setText("lala");
    }
  }

代码组织得不好，但这或多或少是我想做的

Answer 1

一种方法是拥有一个包含监听器的内部类:

public void actionPerformed(ActionEvent event)
  {
    if (event.getSource() == button)
    {
      JButton newButton = new JButton("ahah");
      newButton.addMouseListener(new yourListener());
    }
   }  

//add this class as a inner class
   public class aListener extends MouseAdapter
   { 
      public void mouseClicked(MouseEvent e)
      {
         JButton buttonReference=(JButton)e.getSource(); // you want this since hardcoding the name of the button is bad if you want listeners for more then one button
         buttonReference.setText("lala");
      }
    }

这将创建一个 yourListener 的实例，并在您单击它时将其添加到按钮