如何解决我无法解决的小GUI问题JTextFields
这是我创建的GUI。
成绩计算器
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我不知道您的主要方法在哪里，但是您必须始终通过调用SwingUtilities invokeLater方法来启动Swing应用程序。invokeLater方法将Swing组件的创建和执行放在事件调度线程（EDT）上。
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使用GridBagLayout时，我使用创建的addComponent方法为每个Swing组件创建唯一的GridBagConstraints。我不想记住默认值。
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JFrame方法的顺序非常重要。在此示例中，记住JFrame方法的顺序。
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我把指令放在JTextArea中。这样，指令文本将根据JTextArea的大小进行拆分。无需对HTML的换行符进行硬编码。
Here’s the code.
package com.ggl.testing;
import java.awt.Component;
import java.awt.Container;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
public class GradeAnalysis implements Runnable {
private static final Insets normalInsets = new Insets(10, 10, 0, 10);
private static final Insets finalInsets = new Insets(10, 10, 10, 10);
public static void main(String[] args) {
SwingUtilities.invokeLater(new GradeAnalysis());
}
@Override
public void run() {
JFrame frame = new JFrame("Grade Calculator");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(createMainPanel());
frame.pack();
frame.setVisible(true);
}
private 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);
instructionTextArea.setText(getInstructions());
JScrollPane instructionScrollPane = new JScrollPane(instructionTextArea);
addComponent(panel, instructionScrollPane, 0, gridy++, 3, 1,
finalInsets, GridBagConstraints.CENTER,
GridBagConstraints.HORIZONTAL);
// JLabels for Assignment/Grade/Weight(Percent)
JLabel label1 = new JLabel("Assignment");
label1.setHorizontalAlignment(JLabel.CENTER);
addComponent(panel, label1, 0, gridy, 1, 1, finalInsets,
GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL);
JLabel label2 = new JLabel("Mark");
label2.setHorizontalAlignment(JLabel.CENTER);
addComponent(panel, label2, 1, gridy, 1, 1, finalInsets,
GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL);
JLabel label3 = new JLabel("Weight");
label3.setHorizontalAlignment(JLabel.CENTER);
addComponent(panel, label3, 2, gridy++, 1, 1, finalInsets,
GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL);
// JLabel Numbers for the number list of assignments at the side.
JLabel number = new JLabel("1");
number.setHorizontalAlignment(JLabel.CENTER);
addComponent(panel, number, 0, gridy, 1, 1, normalInsets,
GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL);
// JTextfield for Mark
JTextField mark = new JTextField(20);
mark.setHorizontalAlignment(JLabel.CENTER);
addComponent(panel, mark, 1, gridy, 1, 1, normalInsets,
GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL);
// JTextfield for Weight
JTextField weight = new JTextField(20);
weight.setHorizontalAlignment(JLabel.CENTER);
addComponent(panel, weight, 2, gridy++, 1, 1, normalInsets,
GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL);
return panel;
}
private String getInstructions() {
return "Instructions: Type in the grades you’ve received, along with the weights "
+ "they’ll have in the determination of your overall average. After you "
+ "press ‘Calculate’, the results will show your average so far. Every "
+ "grade you enter must be a non-negative number, and every "
+ "percentage/weight you enter must be a positive number :)";
}
private 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);
}
}
解决方法
我无法管理的小错误。所以现在我的程序GUI如下所示：
现在，“标记”列下有一个TextField，用户可以输入其数据。我也想对重量部分使用相同的功能，因为我想在“重量”列下插入一个TextField。
但是，当我尝试放入TextField时，当窗口较小时，两个Textfield都将像这样旋转：
而当窗口放大时：
我该如何做，以便在“标记和权重”下有一个文本字段？
Code:
public class Gradeanalysis implements ActionListener {
public void actionPerformed (ActionEvent e){
GridBagConstraints gbc = new GridBagConstraints();
//Adding the JPanels. Panel for instructions
JPanel panel = new JPanel();
panel.setLayout(new GridBagLayout());
//JLabel for the Instructions.
JLabel label = new JLabel("<html> Instructions: Type in the grades you’ve received,along with the weights they’ll have in the determination of your overall average. <br> After you press ‘Calculate’,the results will show your average so far. <br> Every grade you enter must be a non-negative number,and every percentage/weight you enter must be a positive number :)</html>");
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridwidth = 2;
gbc.gridy = 0;
panel.add(label,gbc);
//JLabel1 for Assingment/Grade/Weight(Percent)
JLabel label1 = new JLabel("<html><pre>Assingment\t\t\t\t\t Mark\t\t\t\t\tWeight</pre></html>");
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridx = 0;
gbc.gridy = 1;
gbc.anchor = GridBagConstraints.NORTH;
panel.add(label1,gbc);
//JLabel Numbers for the number list of assingments at the side.
JLabel numbers = new JLabel("1");
gbc.gridx = 0;
gbc.gridy = 2;
gbc.anchor = GridBagConstraints.NORTH;
gbc.weighty = 1;
panel.add(numbers,gbc);
//JTextfield for Mark
JTextField mark = new JTextField(2);
gbc.fill = GridBagConstraints.NONE;
gbc.gridy = 2;
panel.add(mark,gbc);
//JTextfield for Weight
JTextField weight = new JTextField(2);
gbc.gridx = 2;
panel.add(weight,gbc);
//New frame set
JFrame frame = new JFrame("Grade Calculator-- ");
frame.setVisible(true);
frame.setSize(750,700);
frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
frame.add(panel);
}
}
Thanks for reading.
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