Question

我查看了一段时间的代码，无法找到为什么我的按钮不起作用。我的“startButton”在点击时起作用，但我的“helpButton”不会。当我点击按钮时它不会运行println代码。任何帮助将不胜感激。

public class test extends JFrame{

    private JLabel label;
    private JButton button;

    private ImageIcon bgi;
    private JLabel bgl;

    public static Rectangle gameSquare;


    private JButton startButton;
    private JButton helpButton;
    private final Action action = new SwingAction();


    public static void main(String[] args) throws MalformedURLException, IOException {
        test gui = new test ();
        gui.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // when click x close program
        gui.setSize(902, 305);
        gui.setVisible(true);
        gui.setTitle("Solid Cloud Inc - Twitter Unfolower");
    }

    public test() throws MalformedURLException, IOException{

        bgi = new ImageIcon(getClass().getResource("tu.png"));
        getContentPane().setLayout(null);

        BufferedImage img = ImageIO.read(new URL("http://i1344.photobucket.com/albums/p656/SolidCloudInc/start_zpsf3781681.png"));
        //ImageIcon start = new ImageIcon(getClass().getResource("start.png"));
        startButton = new JButton("");
        startButton.setIcon(new ImageIcon(img));
        startButton.setBounds(22, 186, 114, 50);


        getContentPane().add(startButton);

        BufferedImage img2 = ImageIO.read(new URL("http://i1344.photobucket.com/albums/p656/SolidCloudInc/help_zpsc4fad867.png"));
        final JButton helpButton = new JButton("");
        helpButton.setIcon(new ImageIcon(img2));
        helpButton.setBounds(192, 186, 114, 50);

        getContentPane().add(helpButton);

        bgl = new JLabel (bgi);
        bgl.setBounds(0, 0, 886, 272);
        getContentPane().add(bgl);

        Events e = new Events();
        startButton.addActionListener(e);
        helpButton.addActionListener(e);
    }

    public class Events implements ActionListener {


        public void actionPerformed(ActionEvent e) {

            if (e.getSource() == startButton) {
               label.setText("Searching");

               try {
                Unfollow();
            } catch (InterruptedException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }
            }
            else if (e.getSource() == helpButton){
                System.out.println("gottem");
            }
    }

    }

Answer 1

您正在隐藏JButton构造函数中的helpButton变量test，从而与null中的ActionListener引用进行比较。取代

JButton helpButton = new JButton("");

带

helpButton = new JButton("");

除此之外：Java命名约定显示类以大写字母开头，例如Test。

Button不会做任何Java

1 个答案: