align the JLabels and JTextFields vertically in different areas

I have 3 TitledBorders to 3 different areas of my frame.
Each region has its own components - JLabels, textfield, etc..
How to align the JLabels and JTextFields vertically in different areas?
for example, for the following test program, how to configure label1, label2, label3 so that their right sides all align them vertically and
TF1, tf2, tf3 so that their left ribs all line up vertically?

import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.GridLayout;
import java.awt.Insets;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.border.TitledBorder;

public class TitledBorderDemo extends JFrame {
  public TitledBorderDemo() {
    super("TitledBorderDemo");

    JTextField tf1 = new JTextField("hello", 6);
    JTextField tf2 = new JTextField("hello", 12);
    JTextField tf3 = new JTextField("test");
    JTextField tf4 = new JTextField("test2");

    JLabel label1 = new JLabel("1234567890ertyuiyup label");
    JLabel label2 = new JLabel("zzzzzzzzzzzzzzzzzzzzzzzzzzzzzz long label");
    JLabel label3 = new JLabel("short label");
    JLabel label4 = new JLabel("test");

    JPanel panel_tf = new JPanel(new GridBagLayout());
    JPanel panel_pf = new JPanel(new GridBagLayout());
    JPanel panel_ftf = new JPanel(new GridBagLayout());
    
    GridBagConstraints constraints = new GridBagConstraints(0, 0, 3, 3,
            0.0, 0.0, GridBagConstraints.WEST, GridBagConstraints.NONE,
            new Insets(10, 10, 10, 10), 0, 0);

    constraints.gridx = 0;
    constraints.gridy = 0;
    constraints.gridwidth = 2;
    constraints.anchor = GridBagConstraints.WEST;
    panel_tf.add(label1, constraints);
    
    constraints.gridx = 2;
    constraints.gridwidth = 1;
    constraints.anchor = GridBagConstraints.EAST;
    panel_tf.add(tf1, constraints);

    constraints.gridx = 0;
    constraints.gridy = 1;
    constraints.gridwidth = 2;
    constraints.anchor = GridBagConstraints.WEST;
    panel_pf.add(label2, constraints);

    constraints.gridx = 2;
    constraints.gridwidth = 1;
    constraints.anchor = GridBagConstraints.EAST;
    panel_pf.add(tf2, constraints);
    
    constraints.gridx = 0;
    constraints.gridy = 2;
    constraints.gridwidth = 2;
    constraints.anchor = GridBagConstraints.WEST;
    panel_ftf.add(label3, constraints);

    constraints.gridx = 2;
    constraints.gridwidth = 1;
    constraints.anchor = GridBagConstraints.EAST;
    panel_ftf.add(tf3, constraints);

    constraints.gridx = 3;
    constraints.gridwidth = 1;
    constraints.anchor = GridBagConstraints.WEST;
    panel_ftf.add(label4, constraints);

    constraints.gridx = 4;
    constraints.anchor = GridBagConstraints.EAST;
    panel_ftf.add(tf4, constraints);


    panel_tf.setBorder(new TitledBorder("JTextField1"));
    panel_pf.setBorder(new TitledBorder("JTextField2"));
    panel_ftf.setBorder(new TitledBorder("JTextField3"));

    JPanel pan = new JPanel(new GridLayout(3, 1, 10, 10));
    pan.add(panel_tf);
    pan.add(panel_pf);
    pan.add(panel_ftf);
    this.add(pan);
  }

  public static void main(String args[]) {
    JFrame frame = new TitledBorderDemo();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(600, 450);
    frame.setVisible(true);
  }
}

I forgot how tedious GBL can be straight out of the box, since I usually use a helper class that I wrote for the work of constraints (a common approach).

Anyway, here's a sample program ussing the technique I described previously. Note the horizontal on the panels of 1st and 3rd spacers that are used to "take out" the text fields so they line up on the left with the text of Group 2 field. I also added some glues at the end of these panels to make each Panel to fill in the same width.

import java.awt.*;

import javax.swing.*;
import javax.swing.border.*;

public class TitledBorderDemo extends JFrame {
  public TitledBorderDemo() {
    super("TitledBorderDemo");

    JLabel nameLabel = new JLabel("Name");
    JTextField nameText = new JTextField(20);

    JLabel addressLabel = new JLabel("Address (City & State)");
    JTextField addressText = new JTextField(40);

    JLabel phoneLabel = new JLabel("Phone");
    JTextField phoneText = new JTextField(20);

    int longWidth = addressLabel.getPreferredSize().width;

    GridBagConstraints constraints = new GridBagConstraints();

    //--------------------

    JPanel p1 = new JPanel(new GridBagLayout());
    p1.setBorder(createBorder("Name"));

    constraints.gridx = 0;
    constraints.gridy = 0;
    constraints.anchor = GridBagConstraints.EAST;
    constraints.insets = new Insets(4,6,4,6);
    p1.add(nameLabel, constraints);

    constraints.gridx = 1;
    constraints.anchor = GridBagConstraints.WEST;
    p1.add(nameText, constraints);

    constraints.gridx = 2;
    constraints.anchor = GridBagConstraints.WEST;
    constraints.fill = GridBagConstraints.HORIZONTAL;
    constraints.weightx = 1.0;
    p1.add(Box.createHorizontalGlue(), constraints);

    constraints.gridx = 0;
    constraints.gridy = 1;
    constraints.fill = GridBagConstraints.NONE;
    constraints.weightx = 0.0;
    p1.add(Box.createHorizontalStrut(longWidth), constraints);

    //--------------------

    JPanel p2 = new JPanel(new GridBagLayout());
    p2.setBorder(createBorder("Address"));

    constraints.gridx = 0;
    constraints.gridy = 0;
    constraints.anchor = GridBagConstraints.EAST;
    constraints.insets = new Insets(4,6,4,6);
    p2.add(addressLabel, constraints);

    constraints.gridx = 1;
    constraints.anchor = GridBagConstraints.WEST;
    p2.add(addressText, constraints);

    constraints.gridx = 2;
    constraints.anchor = GridBagConstraints.WEST;
    constraints.fill = GridBagConstraints.HORIZONTAL;
    constraints.weightx = 1.0;
    p2.add(Box.createHorizontalGlue(), constraints);

    constraints.gridx = 0;
    constraints.gridy = 1;
    constraints.fill = GridBagConstraints.NONE;
    constraints.weightx = 0.0;
    p2.add(Box.createHorizontalStrut(longWidth), constraints);

    //--------------------

    JPanel p3 = new JPanel(new GridBagLayout());
    p3.setBorder(createBorder("Phone"));

    constraints.gridx = 0;
    constraints.gridy = 0;
    constraints.anchor = GridBagConstraints.EAST;
    constraints.insets = new Insets(4,6,4,6);
    p3.add(phoneLabel, constraints);

    constraints.gridx = 1;
    constraints.anchor = GridBagConstraints.WEST;
    p3.add(phoneText, constraints);

    constraints.gridx = 2;
    constraints.anchor = GridBagConstraints.WEST;
    constraints.fill = GridBagConstraints.HORIZONTAL;
    constraints.weightx = 1.0;
    p3.add(Box.createHorizontalGlue(), constraints);

    constraints.gridx = 0;
    constraints.gridy = 1;
    constraints.fill = GridBagConstraints.NONE;
    constraints.weightx = 0.0;
    p3.add(Box.createHorizontalStrut(longWidth), constraints);

    //--------------------

    JPanel panel = new JPanel(new GridBagLayout());

    constraints.gridx = 0;
    constraints.gridy = 0;
    constraints.fill = GridBagConstraints.HORIZONTAL;
    constraints.weightx = 1.0;
    panel.add(p1, constraints);

    constraints.gridy = 1;
    panel.add(p2, constraints);

    constraints.gridy = 2;
    panel.add(p3, constraints);

    this.add(new JScrollPane(panel));
  }

  private Border createBorder(String title)
  {
    TitledBorder b = new TitledBorder(title);
    b.setTitleColor(Color.RED.darker());
    return b;
  }

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

Tags: Java

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