java - 如何执行 JButton Action 监听器一定次数

Question

我有一些代码，其中有 5 个 JButtons 的代码，并且有一个单独的数组，可以生成 1-6 之间的随机数(骰子滚动)，并且在操作监听器内，我只有将按钮添加到面板的部分(panel.add(roll1)) 在 Action 监听器之前，我有一个生成随机数的数组，然后有一个开关，表示如果随机数为 1，则将图像设置为 dice1，如果数组为 2，则将图像设置为 dice2。所以我现在已经完成了所有这些工作，因为我正在制作 Yahtzee 游戏，所以我需要知道如何使其每次移动最多可运行 3 次。现在，JButton 仅单击一次，它会输出带有随机骰子图像的其他 JButton，但是当我再次单击滚动按钮按钮时，骰子不会滚动，它保持不变。你会怎么做？

public static void randomRoll(final JPanel panel) throws Exception
  {

    final ImageIcon icon = new ImageIcon(new URL("http://upload.wikimedia.org/wikipedia/commons/thumb/c/c5/Dice-1.png/45px-Dice-1.png"));
    final ImageIcon icon1 = new ImageIcon(new URL("http://upload.wikimedia.org/wikipedia/commons/thumb/1/18/Dice-2.png/45px-Dice-2.png"));
    final ImageIcon icon2 = new ImageIcon(new URL("http://upload.wikimedia.org/wikipedia/commons/thumb/7/70/Dice-3.png/45px-Dice-3.png"));
    final ImageIcon icon3 = new ImageIcon(new URL("http://upload.wikimedia.org/wikipedia/commons/thumb/a/a9/Dice-4.png/45px-Dice-4.png"));
    final ImageIcon icon4 = new ImageIcon(new URL("http://upload.wikimedia.org/wikipedia/commons/thumb/6/6c/Dice-5.png/45px-Dice-5.png"));
    final ImageIcon icon5 = new ImageIcon(new URL("http://upload.wikimedia.org/wikipedia/commons/thumb/5/5c/Dice-6.png/45px-Dice-6.png"));

    final ImageIcon [] diceIcons = {icon, icon1, icon2, icon3, icon4, icon5};

    int array [] = new int [5];


    for(int i = 0; i < 5; i++)
    {
      array [i]= (int) (Math.random () * 6) + 1;
      System.out.println(array[i]);
    }

    final JButton roll1 = new JButton(diceIcons[array[0]-1]);
    final JButton roll2 = new JButton(diceIcons[array[1]-1]);
    final JButton roll3 = new JButton(diceIcons[array[2]-1]);
    final JButton roll4 = new JButton(diceIcons[array[3]-1]);
    final JButton roll5 = new JButton(diceIcons[array[4]-1]);
    final JButton dice = new JButton ("Roll Dice");

    dice.setBounds(40, 40, 100, 30);
    panel.add(dice);
    panel.setLayout(null);

    dice.addActionListener(new ActionListener()
    {
      public void actionPerformed(ActionEvent e)
      {
        roll1.setBounds(40, 100, 70, 70);
        roll2.setBounds(40, 180, 70, 70);
        roll3.setBounds(40, 260, 70, 70);
        roll4.setBounds(40, 340, 70, 70);
        roll5.setBounds(40, 420, 70, 70);

        //Adding to JFrame
        panel.add(roll1);
        panel.add(roll2);
        panel.add(roll3);
        panel.add(roll4);
        panel.add(roll5);
        panel.doLayout();
        panel.repaint();
        panel.revalidate();
     }
    });


  }

更新

dice.addActionListener(new ActionListener()
{
  public void actionPerformed(ActionEvent e)
  {
    int array [] = new int [5];

    for(int i = 0; i < 5; i++)
    {
      array [i]= (int) (Math.random () * 6) + 1;
      System.out.println(array[i]);
    }
final JButton roll1 = new JButton(diceIcons[array[0]-1]);
final JButton roll2 = new JButton(diceIcons[array[1]-1]);
final JButton roll3 = new JButton(diceIcons[array[2]-1]);
final JButton roll4 = new JButton(diceIcons[array[3]-1]);
final JButton roll5 = new JButton(diceIcons[array[4]-1]);


    roll1.setBounds(40, 100, 70, 70);
    roll2.setBounds(40, 180, 70, 70);
    roll3.setBounds(40, 260, 70, 70);
    roll4.setBounds(40, 340, 70, 70);
    roll5.setBounds(40, 420, 70, 70);

    //Adding to JFrame
    panel.add(roll1);
    panel.add(roll2);
    panel.add(roll3);
    panel.add(roll4);
    panel.add(roll5);
    panel.doLayout();
    panel.repaint();
    panel.revalidate();
 }
});

Answer 1

您可以使用 setActionCommand("add"+ "1"); 为每个 JButton 设置一个 actionCommand;//假设 '1' 是 for 循环中的 'i' 值

然后，在 ActionListiner 的实现方法中:

@Override
public void actionPerformed(ActionEvent e) {

    String cmd = e.getActionCommand();

    if (cmd.equals("add1")){
        System.out.println("from add1");
    }


}