Thread: Java GUI

Hello, im working on a battleship game in java and i'm currently working with the graphical part of the program. Im trying to make a JPanel that i will fill with JComboBox. The JComboBox will have some preset values 0-7 that allows me to select different positions in an 2d array that i will assign with boats. However i cant get it to show. Keep in mind that my code isn't completely done and this is only a window to set player information.

My code:

import java.awt.Container;
import java.awt.GridLayout;
 
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.WindowConstants;
 
public class WelcomeWindow extends JFrame {
 
	private Container contentPanel;
	private JButton okButton;
 
	public WelcomeWindow(){
		configureFrame();
		initiateInstanceVariables();
		addComponentsToFrame();
	}
 
	private void configureFrame(){
		this.setSize(400, 600);
		this.setLocationRelativeTo(null);
		this.setResizable(false);
		this.setTitle("Add Player");
		this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
		setVisible(true);
		}
 
	private void addComponentsToFrame(){
		JPanel dropDownPanel = new JPanel();
		dropDownPanel.setLayout(null);
		dropDownPanel.setBorder(BorderFactory.createTitledBorder("Pos for ships"));
 
		this.contentPanel.add(this.okButton);
		JPanel aPanel= buildComboBoxes();
		dropDownPanel.add(aPanel);
 
		this.contentPanel.add(dropDownPanel);
	}
 
	private void initiateInstanceVariables(){
	this.okButton = new JButton("Ok");
	this.okButton.setBounds(150, 500, 100, 40);
 
	this.contentPanel = this.getContentPane();
	this.contentPanel.setLayout(null);
	}
 
	private JPanel buildComboBoxes(){
		JPanel comboPanel = new JPanel();
		comboPanel.setLayout(new GridLayout(4,2,00,10));
		comboPanel.setBounds(0,100,400,200);
 
		String[] avaliblePos = {"0","1","2","3","4","5","6","7"};
		JComboBox xyPos = null;
		for(int i=0;i<avaliblePos.length;i++){
			xyPos = new JComboBox(avaliblePos);
		}
		comboPanel.add(xyPos);
 
 
		return comboPanel;
	}
}

Yes the code compiles and the window pops up just as its "suppose" to.
JAVA.jpg
However i don't think that the gridlayout is working properly. This is my first project in java with GUI so im having some problems to get it working the way i want to, i hope that is understandable .

I do,

	public static void main(String arg[]){
		GUI gui= new GUI();
		WelcomeWindow guiW = new WelcomeWindow();
		guiW.setVisible(true);		
	}

GUI gui= new GUI(); My gamewindow that holds a board.

WelcomeWindow guiW = new WelcomeWindow(); The window i can't get to work properly, its a separate class that will launch before the gamewindow lunches (will implement how its shown later on, im only trying to get it work for now so i can start implementing the game code).

I cant understand half of the stuff im doing either so its understandable that you don't get it, hehe.
kljn.jpg
However i got a little bit further. Ill probably come back with more questions after i've slept, thanks for the help.