java - 如何在Java swing中从另一个类禁用一个类中的多个JButton？

Question

我有这个代码片段(实际上是代码的一部分)，其中在一个类中我为 26 个字母创建了所有 Jbutton。我有另一个类来跟踪时间，当时间结束或游戏结束时，我想一次性禁用所有 26 个 JButton。

这是创建 Jbutton 的代码

public class DetailsPanel extends JPanel {



        public DetailsPanel() {
            setLayout(new BorderLayout());
            setBorder(BorderFactory.createTitledBorder(" click here "));

            JPanel letterPanel = new JPanel(new GridLayout(0, 5));
            for (char alphabet = 'A'; alphabet <= 'Z'; alphabet++) {
                String buttonText = String.valueOf(alphabet);
                JButton letterButton = new JButton(buttonText);
                letterButton.addActionListener(clickedbutton());
                letterPanel.add(letterButton, BorderLayout.CENTER);
            }
            add(letterPanel, BorderLayout.CENTER);
        }

        }

在我的maincontrol类中，我想关闭所有Jbuttons，就像

public class maincontrol {
     int counter;
     DetailsPanel dp;
     public maincontrol(DetailsPanel dp) {
     this.dp = dp;
     int counter = 0;
}

public void turnoff(){
   if ( counter>10){
       //turn off all here//
    }
}

}

Answer 1

保留对您的详细信息面板的引用。添加一个方法来禁用按钮，例如:

public class DetailsPanel extends JPanel {
    private final JPanel letterPanel;
    public DetailsPanel() {
        setLayout(new BorderLayout());
        setBorder(BorderFactory.createTitledBorder(" click here "));

        letterPanel = new JPanel(new GridLayout(0, 5));
        ...
    }
    public void disableButtons() {
        for (Component c : letterPanel.getComponents()) {
          if (c instanceof JButton) c.setEnabled(false);
        }
    }
}

当您想要禁用按钮时调用它。或者更聪明一点，根据您传入的内部匝数来执行此操作:

    private static final int MAX_TURNS = 10;
    public void updateButtons(int turn) {
        for (Component c : letterPanel.getComponents()) {
          if (c instanceof JButton) c.setEnabled(turn <= MAX_TURNS);
        }
    }