JPanel and GridBagLayout position

[Naxix]

Hello, so i'm quite new to Java, but i have been going through basics, me and some guys from school have this project going,
we have to make a "virtuel" company, and we choose to makeing a computer company, who makes custom build PC's,
and for that i thought i could make a little java program showing different option for each category (CPU, power supply, case, etc),
but i have a hard time position the JComboBoxes and JLabels, if i move my head Label, the comboboxes moves.

This is my code so far:

import java.awt.*;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
 
public class AppStart {
    final static boolean shouldFill = true;
    final static boolean shouldWeightX = true;
    final static boolean RIGHT_TO_LEFT = false;
    

    
    final static String[] CPU = {
			"Intel Core i5 2500K Sandy brigde", "Intel Core i7 3820", 
			"Intel Core i7 2600K Sandy Bridge", "Intel Core i7 2700K Sandy Brigde", 
			"Intel Core i7 3930K", "AMD FX-8150", "AMD FX-4100", "AMD Phenom II X6 1045T"
		};
    
    final static String[] Motherboard = {
			"ASUS P8Z68-V LX", "ASUS P8Z68-V PRO/GEN3", "ASUS SABERTOOTH X79"
		};
 
    public static void addComponentsToPane(Container pane) {
        if (RIGHT_TO_LEFT) {
            pane.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
        }
 
    JComboBox comboBox = new JComboBox();
    JLabel label = new JLabel();
    pane.setLayout(new GridBagLayout());
    GridBagConstraints c = new GridBagConstraints();
    if (shouldFill) {

    c.fill = GridBagConstraints.RELATIVE;
    }
    
    //Label for Title
    label = new JLabel("Choose which parts you want for your computer:");
    if (shouldWeightX) {
    	c.weightx = 0.5;
    }
    c.fill = GridBagConstraints.RELATIVE;
    c.gridx = 100;
    c.gridy = 0;
    pane.add(label, c);
    
    //Label for CPU
    label = new JLabel("Choose a CPU");
    if (shouldWeightX) {
    	c.weightx = 0.5;
    }
    c.fill = GridBagConstraints.RELATIVE;
    c.gridx = 0;
    c.gridy = 10;
    pane.add(label, c);
    
    //ComboBox for CPU
    comboBox = new JComboBox(CPU);
    comboBox.setSelectedIndex(-1);
    if (shouldWeightX) {
    c.weightx = 0.5;
    }
    c.fill = GridBagConstraints.RELATIVE;
    c.gridx = 30;
    c.gridy = 10;
    pane.add(comboBox, c);
    
    //Label for Motherboard
    label = new JLabel("Choose a Motherboard");
    if (shouldWeightX) {
    	c.weightx = 0.5;
    }
    c.fill = GridBagConstraints.RELATIVE;
    c.gridx = 0;
    c.gridy = 20;
    pane.add(label, c);
    
    //ComboBox for Motherboard
    comboBox = new JComboBox(Motherboard);
    comboBox.setSelectedIndex(-1);
    if (shouldWeightX) {
    c.weightx = 0.5;
    }
    c.fill = GridBagConstraints.RELATIVE;
    c.gridx = 30;
    c.gridy = 20;
    pane.add(comboBox, c);
 
    }
 
    private static void createAndShowGUI() {

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

        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
}

[DarrylBurke]

Thread moved from New to Java.

i have a hard time position the JComboBoxes and JLabels, if i move my head Label, the comboboxes moves.

"Move" your head label? How?

db

[Naxix]

The position of it on the screen, like if i move to father along the x axis, it changes the position of some of the Comboboxes too. And sometimes it dosn't change at all,
is this because GridBagLayout is formed by a grid, and the positioning of objects is acting wierd?

Naxix

[DarrylBurke]

My question was 'How?'

db

[Naxix]

This is my "head" label code:

    //Label for Title
    label = new JLabel("Choose which parts you want for your computer:");
    if (shouldWeightX) {
        c.weightx = 0.5;
    }
    c.fill = GridBagConstraints.RELATIVE;
    c.gridx = 100;
    c.gridy = 0;
    pane.add(label, c);

I used the gridx and y to move it, those are the ones i though i had to use to move JLabels with GridBagLayout,
but when i run my code the comboboxes and labels are all over the screen, it's like i can't get them to move with x amount of pixels i put in
gridx and y, and if it does move, the comboboxes moves further to the right, so it's like i can't get the label and boxes to line up.

[DarrylBurke]

GridBagConstraints#gridx/y are not pixel positions -- they are column/row indexes.

I suggest you go through the tutorial on How to Use GridBagLayout (The Java™ Tutorials > Creating a GUI With JFC/Swing > Laying Out Components Within a Container)

db