Как вы исправляете выравнивание GridBagLayout?

Question

Я хотел бы спросить кое-что о GridBagLayout, потому что всякий раз, когда я пытаюсь поставить lblStudentID под lblName он просто делает вывод, в котором он находится в правой части lblName

import javax.swing.*; 
import java.awt.*; 

public class Student extends JPanel { 

    JLabel picture; 
    JLabel lblStudentID = new JLabel("Student ID:"); 
    JLabel lblName = new JLabel("Name:"); 
    JLabel lblProg = new JLabel("Program:"); 
    JLabel lblGen = new JLabel("Gender:"); 
    JPanel panel = new JPanel(); 

    JRadioButton rbtn1 = new JRadioButton("Male"); 
    JRadioButton rbtn2 = new JRadioButton("Female"); 

    JComboBox cmbProg = new JComboBox(); 

    TextField txtStudentID = new TextField(); 
    TextField txtName = new TextField(); 

    GridBagConstraints gbc = new GridBagConstraints(); 

    public void setName() { 

    } 

    public Student() { 
     setLayout(new GridBagLayout()); 

     picture = new JLabel(createImageIcon("images/student.jpg")); 
     picture.setSize(100, 100); 
     add(picture); 

     add(lblName, gbc); 
     gbc.gridx = 0; 
     gbc.gridy = 0; 
     add(txtName, gbc); 
     gbc.gridx = 1; 
     gbc.gridy = 0; 
     add(lblStudentID, gbc); 
     gbc.gridx = 0; 
     gbc.gridy = 1; 
     add(txtStudentID, gbc); 
     gbc.gridx = 1; 
     gbc.gridy = 1; 
    } 

    private static void createAndShowGUI() { 
     // Create and set up the window. 
     JFrame frame = new JFrame("Student"); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 

     frame.setSize(400, 300); 
     // Display the window. 

     Student LoginPane = new Student(); 

     LoginPane.setOpaque(true); // content panes must be opaque 
     LoginPane.setLayout(new FlowLayout()); 
     LoginPane.setBackground(Color.white); 
     frame.setContentPane(LoginPane); 
     frame.setVisible(true); 

    } 

    protected static ImageIcon createImageIcon(String path) { 
     java.net.URL imgURL = Student.class.getResource(path); 
     if (imgURL != null) { 
      return new ImageIcon(imgURL); 
     } else { 
      System.err.println("Couldn't find file: " + path); 
      return null; 
     } 
    } 

    public static void main(String[] args) { 
     // Schedule a job for the event-dispatching thread: 
     // creating and showing this application's GUI. 
     javax.swing.SwingUtilities.invokeLater(new Runnable() { 
      public void run() { 
       createAndShowGUI(); 
      } 
     }); 
    } 
} 

Answer 1

Сначала вы изменить GridBagConstraints слишком поздно.

gbc.gridx = 0; 
gbc.gridy = 0; 
add(lblName,gbc); 
gbc.gridx = 1; 
gbc.gridy = 0; 
add(txtName,gbc); 
gbc.gridx = 0; 
gbc.gridy = 1; 
add(lblStudentID,gbc); 
gbc.gridx = 1; 
gbc.gridy = 1; 
add(txtStudentID,gbc); 

Во-вторых, вы меняете макет обратно на FlowLayout вашего LoginPane.

Редактировать Я убрал ваш код. Может быть, это поможет вам:

import java.awt.BorderLayout; 
import java.awt.Color; 
import java.awt.Dimension; 
import java.awt.GridBagConstraints; 
import java.awt.GridBagLayout; 
import java.awt.TextField; 
import java.net.URL; 

import javax.swing.BorderFactory; 
import javax.swing.ImageIcon; 
import javax.swing.JFrame; 
import javax.swing.JLabel; 
import javax.swing.JPanel; 

public class Student extends JPanel { 

    private static final long serialVersionUID = 8923497527096438302L; 

    private JLabel picture; 
    private JLabel lblStudentID = new JLabel("Student ID:"); 
    private JLabel lblName = new JLabel("Name:"); 

    TextField txtStudentID = new TextField(); 
    TextField txtName = new TextField(); 

    public Student() { 
     setLayout(new BorderLayout()); 
     setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5)); 
     setBackground(Color.WHITE); 
     JPanel formPanel = new JPanel(new GridBagLayout()); 
     GridBagConstraints gbc = new GridBagConstraints(); 
     formPanel.setOpaque(false); 

     picture = new JLabel(createImageIcon("images/student.jpg")); 
     picture.setPreferredSize(new Dimension(100, 100)); 
     picture.setBorder(BorderFactory.createLineBorder(Color.black)); 

     gbc.fill = GridBagConstraints.BOTH; 
     gbc.gridy = 0; 
     formPanel.add(picture, gbc); 

     gbc.gridy = 1; 
     gbc.gridwidth = 1; 
     formPanel.add(lblName, gbc); 
     gbc.gridy = 1; 
     gbc.weightx = 1; 
     formPanel.add(txtName, gbc); 
     gbc.weightx = 0; 
     gbc.gridy = 2; 
     formPanel.add(lblStudentID, gbc); 
     gbc.gridy = 2; 
     formPanel.add(txtStudentID, gbc); 

     add(formPanel, BorderLayout.PAGE_START); 
    } 

    private static void createAndShowGUI() { 
     // Create and set up the window. 
     JFrame frame = new JFrame("Student"); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 

     frame.setSize(400, 300); 
     // Display the window. 

     new Student().setBackground(Color.white); 
     frame.setContentPane(new Student()); 
     frame.setVisible(true); 
    } 

    protected static ImageIcon createImageIcon(String path) { 
     URL imgURL = Student.class.getResource(path); 
     if (imgURL != null) { 
      return new ImageIcon(imgURL); 
     } else { 
      System.err.println("Couldn't find file: " + path); 
      return null; 
     } 
    } 

    public static void main(String[] args) { 
     javax.swing.SwingUtilities.invokeLater(new Runnable() { 
      public void run() { 
       createAndShowGUI(); 
      } 
     }); 
    } 
}