java - GridBagLayout格式错误。 JTextFields位置错误

我根本无法让我的JTextFields正确对齐。现在程序看起来像这样：
。

现在，分配编号已正确对齐。但是，Mark JTextfield从7开始，而Weight JTextField从最后一个Mark开始。

现在，我要使所有东西正确对齐。这意味着在分配1中，同一行下有Mark和Weight JTextFields。这应该一直下降到7（或我选择的行数）。

码：

    public class test{

    private static final Insets normalInsets = new Insets(10,10,0,10);
    private static final Insets finalInsets = new Insets(10,10,10,10);





    private static JPanel createMainPanel(){
        GridBagConstraints gbc = new GridBagConstraints();

        //Adding the JPanels. Panel for instructions
        JPanel panel = new JPanel();
        panel.setLayout(new GridBagLayout());

        int gridy = 0;

        //JLabel for the Instructions
        JTextArea instructionTextArea = new JTextArea(5, 30);
        instructionTextArea.setEditable(false);
        instructionTextArea.setLineWrap(true);
        instructionTextArea.setWrapStyleWord(true);

        JScrollPane instructionScrollPane = new JScrollPane(instructionTextArea);
        addComponent(panel, instructionScrollPane, 0, gridy++, 3, 1, finalInsets, GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL);

        //JLabels for Assignment
        JLabel label1 = new JLabel("Assignment");
        label1.setHorizontalAlignment(JLabel.CENTER);
        addComponent(panel, label1, 0, gridy, 1, 1, finalInsets,GridBagConstraints.CENTER,GridBagConstraints.HORIZONTAL);

        //JLabel for Mark
        JLabel label2 = new JLabel("Mark");
        label2.setHorizontalAlignment(JLabel.CENTER);
        addComponent(panel, label2, 1, gridy, 1, 1, finalInsets, GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL);

        //JLabel for Weight.
        JLabel label3 = new JLabel("Weight");
        label3.setHorizontalAlignment(JLabel.CENTER);
        addComponent(panel, label3, 2, gridy++, 1, 1, finalInsets, GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL);



        //JLabel Number for the number list of assignments at the side.
        for(int i = 1; i<=7; i++){
            String kok = String.valueOf(i);
        JLabel number = new JLabel(kok);
        number.setHorizontalAlignment(JLabel.CENTER);
        addComponent(panel, number, 0, gridy++, 1, 1, normalInsets, GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL);
        }

        //JTextfield for Mark
        for(int i=0; i<7; i++){
        JTextField mark = new JTextField(20);
        mark.setHorizontalAlignment(JLabel.CENTER);
        addComponent(panel, mark, 1, gridy++, 1, 1, normalInsets, GridBagConstraints.CENTER,GridBagConstraints.NONE);
        }

        //JTextfield for Weight
        for(int i=0; i<7; i++){
        JTextField weight = new JTextField(20);
        weight.setHorizontalAlignment(JLabel.CENTER);
        addComponent(panel, weight, 2, gridy++, 1, 1, normalInsets, GridBagConstraints.CENTER,GridBagConstraints.NONE);
        }

        return panel;

    }

    private static void addComponent(Container container, Component component, int gridx, int gridy, int gridwidth, int gridheight, Insets insets, int anchor, int fill ){
        GridBagConstraints gbc = new GridBagConstraints(gridx, gridy, gridwidth, gridheight, 1.0D,1.0D,anchor,fill,insets,0,0);
        container.add(component,gbc);
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(createMainPanel());
        frame.pack();
        frame.setVisible(true);
        new test();
    }
}

我是一个新的Java程序员，所以请轻松一点:)。

更新~~~~~

 After running the `for` loops which add the `JLabels` and `JTextFields`, you will need to reset `gbc.gridy = 1`. This way the loop will start adding components from the top row.

//JLabel Number for the number list of assignments at the side.
for(int i = 1; i<=7; i++){
    String kok = String.valueOf(i);
    JLabel number = new JLabel(kok);
    number.setHorizontalAlignment(JLabel.CENTER);
    addComponent(panel, number, 0, gridy++, 1, 1, normalInsets, GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL);
}
gbc.gridy = 1;

//JTextfield for Mark
for(int i=0; i<7; i++){
    JTextField mark = new JTextField(20);
    mark.setHorizontalAlignment(JLabel.CENTER);
    gridy = 1; //The code only partly works when I include this
    addComponent(panel, mark, 1, gridy++, 1, 1, normalInsets, GridBagConstraints.CENTER,GridBagConstraints.NONE);
}
gbc.gridy = 1;

这是它的样子：



只有Weight JTextField正确对齐。当我不添加'gridy = 1'时，其格式错误与原始屏幕截图相同。

最佳答案

在运行添加了for和JLabels的JTextFields循环之后，您将需要重置gbc.gridy = 2。这样，循环将开始从顶部开始添加组件。另外，每次使用addComponent()时，请将gridy++更改为gbc.gridy++。

gbc.gridy = 2;

//JLabel Number for the number list of assignments at the side.
for(int i = 1; i<=7; i++){
    String kok = String.valueOf(i);
    JLabel number = new JLabel(kok);
    number.setHorizontalAlignment(JLabel.CENTER);
    addComponent(panel, number, 0, gbc.gridy++, 1, 1, normalInsets, GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL);
}
gbc.gridy = 2;

//JTextfield for Mark
for(int i=0; i<7; i++){
    JTextField mark = new JTextField(20);
    addComponent(panel, mark, 1, gbc.gridy++, 1, 1, normalInsets, GridBagConstraints.CENTER,GridBagConstraints.NONE);
}
gbc.gridy = 2;

//JTextfield for Weight
for(int i=0; i<7; i++){
    JTextField weight = new JTextField(20);
    weight.setHorizontalAlignment(JLabel.CENTER);
    addComponent(panel, weight, 2, gbc.gridy++, 1, 1, normalInsets, GridBagConstraints.CENTER,GridBagConstraints.NONE);
}

结果如下所示：

关于java - GridBagLayout格式错误。 JTextFields位置错误，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/31495921/