java GridBagLayout格式错误。JTextFields位于错误的位置
我根本无法使JTextFields正确对齐。目前,该程序如下所示:
现在作业编号已正确对齐。但是,标记JTextfield从7开始,权重JTextfield从最后一个标记开始
现在我想要的是所有东西都正确对齐。这意味着在作业1中,同一行下有标记和权重jtext字段。这应该一直到7行(或者我选择了多少行)强>
代码:
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();
}
}
我是一个糟糕的新Java程序员,所以请放轻松:)
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;
这就是它看起来的样子:
只有权重字段正确对齐。当我没有添加'gridy=1'时,它与我的原始屏幕截图有相同的格式错误
# 1 楼答案
运行添加
JLabels
和JTextFields
的for
循环后,需要重置gbc.gridy = 2
。这样,循环将从顶行开始添加组件。另外,在每次使用addComponent()
时,将gridy++
更改为gbc.gridy++
结果是这样的: