Question

我真的很生气，因为我知道一个不在我身边的事实！每次我在Eclipse中运行当前项目时，每次显示都不同！我的意思是，我运行一次它只显示我的三个组件。我再次运行它显示更多。我再次运行它，它显示三个等等.. 这到底是怎么回事。这是我在主字符串args中运行的代码：

        JFrame frame = new JFrame("Survey");
    frame.setSize(500, 500);
    frame.setVisible(true);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JPanel panel = new JPanel(new GridBagLayout());
    panel.setBackground(Color.GRAY);
    frame.add(panel, BorderLayout.NORTH);
    GridBagConstraints c = new GridBagConstraints();

    JLabel label1 = new JLabel("First name:");
    c.gridx = 0;
    c.gridy = 0;
    c.insets = new Insets(5, 5, 5, 5);
    panel.add(label1, c);

    JLabel label2 = new JLabel("Last name:");
    c.gridx = 0;
    c.gridy = 1;
    panel.add(label2, c);

    JTextField text1 = new JTextField(10);
    c.gridx = 1;
    c.gridy = 0;
    panel.add(text1, c);

    JTextField text2 = new JTextField(10);
    c.gridx = 1;
    c.gridy = 1;
    panel.add(text2, c);

    JLabel label3 = new JLabel("What is your favorite sport:");
    c.gridx = 0;
    c.gridy = 2;
    c.gridwidth = 2;
    panel.add(label3, c);

    String[] combobox = {"Basketball", "Soccor", "Other"};
    JComboBox cbx = new JComboBox(combobox);
    cbx.setPreferredSize(new Dimension(150, 20));
    c.gridx = 0;
    c.gridy = 3;
    panel.add(cbx, c);

    JLabel label4 = new JLabel("Comments about yourself:");
    c.gridx = 0;
    c.gridy = 4;
    panel.add(label4, c);

    JTextArea area = new JTextArea();
    area.setPreferredSize(new Dimension(185, 100));
    c.gridx = 0;
    c.gridy = 5;
    c.gridheight = 5;
    panel.add(area, c);

    JButton submit = new JButton("Submit");
    submit.setPreferredSize(new Dimension(20, 20));
    c.gridx = 0;
    c.gridy = 6;
    panel.add(submit, c);

Answer 1

根本不需要重新验证。 确保在EDT主题上正确创建组件，您将不再遇到此类问题。请查看以下文章http://docs.oracle.com/javase/tutorial/uiswing/concurrency/initial.html

每次Eclipse运行显示不同

1 个答案: