java - 我希望先删除按钮，然后执行函数 cam() 中的内容

Question

代码:

p.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e) {

        System.out.println("Welcome to Guess the number Game");
        System.out.println("You have 3 chances to guess a number between 0 and 10 excluding 10");

        ne.remove(p);

        // ne.removeAll();
        ne.revalidate();
        ne.repaint();
    }

    public void cam() {

        gamer2 game = new gamer2();
        game.generatenum();
    }
});

p 是一个 JButton。

• 我没有在 actionPerformed() 中调用 cam() 的原因是，如果我这样做，按钮只会在 generatenum() 已执行。我希望先删除该按钮。

Answer 1

cam() 方法属于匿名类(ActionListener 的子类)，在这个匿名类中没有方法调用 cam()。这就是为什么你收到该警告

在我看来，你应该这样做

p.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e) {

        System.out.println("Welcome to Guess the number Game");
        System.out.println("You have 3 chances to guess a number between 0 and 10 excluding 10");

        ne.remove(p);

        // ne.removeAll();
        ne.revalidate();
        ne.repaint();
        cam();
    }

});

public void cam() {

    gamer2 game = new gamer2();
    game.generatenum();
}

或者你可以这样做

p.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e) {

        System.out.println("Welcome to Guess the number Game");
        System.out.println("You have 3 chances to guess a number between 0 and 10 excluding 10");

        ne.remove(p);

        // ne.removeAll();
        ne.revalidate();
        ne.repaint();
        cam();
    }

    public void cam() {

        gamer2 game = new gamer2();
        game.generatenum();
    }
});