Help trying to create multiple rectangles

Question

Hi, I'm trying to create a five-in-a-row game, and I need lots of rectangles, forming a kind of a net. I've figured out a bit, but the thing is that every new rectangle seems to erase all the former ones, so in the end there's just the last one. I use this code:
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import javax.swing.*;
public class luffare extends JApplet {
ruta rutor[] = new ruta[400];
public void init() {
for(int a=0;a<20;a++){
for(int b=0;b<20;b++){
     rutor[a*20+b] = new ruta(a*10, b*10);
     //rutor[a*20+b].setBackground(Color.white);
getContentPane().add(rutor[a*20+b]);
class ruta extends JPanel implements MouseListener, MouseMotionListener{
Rectangle rect;
public ruta(int xPos, int yPos){
rect = new Rectangle(xPos, yPos, 10, 10);
addMouseMotionListener(this);
addMouseListener(this);
public void paintComponent(Graphics g){
Graphics2D g2 = (Graphics2D)g;
g2.draw(rect);
public void mouseReleased(MouseEvent e){}
public void mousePressed(MouseEvent e){}
public void mouseDragged(MouseEvent e){}
public void mouseMoved(MouseEvent e){}
public void mouseClicked(MouseEvent e){}
public void mouseExited(MouseEvent e){}
public void mouseEntered(MouseEvent e){}
I'm really stuck here, can anybody help?
regards,
M?ns Wide

Answer 1

Hey, I'm no Swing expert, actually I'm very much a beginner in Swing! I suggest you go through the Swing tutorials
{color:#0000ff}http://java.sun.com/docs/books/tutorial/uiswing/index.html{color}
and learn about the multitude of features that can be useful to you.
After that, if you have any problems related to Swing, please post in the Swing forum where you will get advice from real experts.
This works, using setBounds(...) with null Layout --I've added the position number to each Ruta (size increased to 20 X 20 for that) so you can see where they go.
file Luffare.javapackage manswide;
import java.awt.*;
import javax.swing.*;
public class Luffare extends JApplet
    Ruta rutor[] = new Ruta[400];
    public void init ()
        setLayout (null);
        for(int a = 0; a < 20; a++)
            for(int b = 0; b < 20; b++)
                rutor[a * 20 + b] = new Ruta (a * 20 + b);
                getContentPane ().add (rutor[a * 20 + b]);
                rutor[a * 20 + b].setBounds (a * 20, b * 20, 20, 20);
}file Ruta.javapackage manswide;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
class Ruta extends JPanel implements MouseListener, MouseMotionListener
    Rectangle rect;
    int id;
    public Ruta (int newId)
        id = newId;
        setBorder (LineBorder.createBlackLineBorder ());
        addMouseMotionListener (this);
        addMouseListener (this);
    public void paintComponent (Graphics g)
        Graphics2D g2 = (Graphics2D)g;
        g2.setFont (new Font("Arial", 1, 9));
        g2.drawString (Integer.toString (id), 2, 10);
    public void mouseReleased (MouseEvent e) {}
    public void mousePressed (MouseEvent e) {}
    public void mouseDragged (MouseEvent e) {}
    public void mouseMoved (MouseEvent e) {}
    public void mouseClicked (MouseEvent e) {}
    public void mouseExited (MouseEvent e) {}
    public void mouseEntered (MouseEvent e) {}
}It's good practise to place each java class in its own file.
db
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