java按钮1。setButton（false）将不会与我的其他代码链接

Question

说明： 嗨，我正在创建我的点击游戏，我不知道为什么我的按钮1。setEnabled（假）；代码不会链接到我的JButton按钮1=新JButton（“黑客级别：”）。我用了两个按钮。第一个按钮启动计时器并计算单击/空格键按下的次数。10秒结束后，按钮将自动禁用。第二个按钮重置单击次数并启用第一个按钮

问题: 因为我使用了两个不同的按钮，所以我必须使用JButton，它不会使它链接到按钮1。setEnabled（假）；密码我怎样把它连接起来

when the timer runs out, set button1 to disable screenshot . button1 screenshot 这是代码中存在问题的部分：

        public TestPane() {

        new GridLayout(0, 1); // 0 rows, 1 column

        timer = new Timer(10, new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                if (startTime < 0) {
                    startTime = System.currentTimeMillis();
                }
                long now = System.currentTimeMillis();
                long clockTime = now - startTime;
                if (clockTime >= duration) {
                    clockTime = duration;
                    timer.stop();

                    **button1.setEnabled(false);**<<<<<<<<<<<<<<<<<<<<

                }
                SimpleDateFormat df = new SimpleDateFormat("mm:ss.SSS");
                label.setText(df.format(duration - clockTime));
            }
        });
        timer.setInitialDelay(0);

        // \/ label wrapper \/ TITLE
        label = new JLabel("Hacker GUI v1", JLabel.CENTER); // label text
        label.setFont(new Font("Roboto", Font.PLAIN, 20)); // font size

        add(label); // add the label
        // /\ label wrapper /\

        // \/ label wrapper \/ DESCRIPTION
        label = new JLabel("To hack, click on the button or press space while on the window.", JLabel.CENTER); // text label
        label.setFont(new Font("Roboto", Font.PLAIN, 15)); // font size
        label.setHorizontalTextPosition(JLabel.CENTER);

        add(label); // add the label
        // /\ label wrapper /\

        // \/ button wrapper \/ BUTTON PLAY
        Dimension d = new Dimension(215, 30); // first number is length (left to right), second number is heigh (top to bottom).

        **JButton button1 = new JButton("Hacker Level: "); // button text**<<<<<<<<<<<<
        button1.setPreferredSize(d); // size of button relitive to dimension d
        button1.setFont(new Font("Roboto", Font.PLAIN, 15)); //font size of button
        button1.addActionListener( new ActionListener(){

            @Override
            public void actionPerformed(ActionEvent e) {
                count++; //count in positive integers
                button1.setText("Hacker Level: " + count); //text change when action preformed

                if (!timer.isRunning()) {
                    startTime = -1;
                    timer.start();
                }
            }
            
        });

        add(button); //add the button
        //     /\ button wrapper /\


        // \/ button wrapper \/ BUTTON RESET
        Dimension a = new Dimension(215, 30); // first number is length (left to right), second number is heigh (top to bottom).

        JButton button2 = new JButton("Reset Score"); // button text
        button2.setPreferredSize(a); // size of button relitive to dimension d
        button2.setFont(new Font("Roboto", Font.PLAIN, 15)); //font size of button
        button2.addActionListener( new ActionListener(){

            @Override
            public void actionPerformed(ActionEvent e) {
                count++; //count in positive integers
                button1.setText("Hacker Level: " + count); //text change when action preformed

                button1.setEnabled(true);

            }
            
        });

        add(button); //add the button
        //     /\ button wrapper /\

Answer 1

在使用按钮1之前，您需要声明并设置它。所以试着把这几行移到计时器行之前的某个地方

Answer 2

JButton button1 = new JButton("Hacker Level: "); 

您正在定义一个局部变量。局部变量不能用于其他方法

您需要将“button1”定义为实例变量（与定义标签的方式相同）：

button1 = new JButton("Hacker Level: ");