Thread: 2d tile map

hello, i am currentlly trying to learn how to make 2d tile map in java. i have the code but for some reason it draws the map rotated to the right. Heres the code:

package test;
 
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JFrame;
import static javax.swing.JFrame.EXIT_ON_CLOSE;
 
/**
 *
 * @author User
 */
public class Test extends JFrame{
 
public int mapy=19;
 
 
public static int[][] 
map =               {{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1},
                    {1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
                    {1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
                    {1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
                    {1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
                    {1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
                    {1, 0, 1, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
                    {1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
                    {1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
                    {1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
                    {1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
                    {1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
                    {1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
                    {1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
                    {1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
                    {1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
                    {1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
                    {1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
                    {1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
                    {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1}};
 
    public Test(){
 
       setVisible(true);
       setDefaultCloseOperation(EXIT_ON_CLOSE);
       setSize(500,500);
       getContentPane().setBackground(Color.white);;
    }
     public void paint(Graphics g){
 
        super.paint(g);
Graphics2D g2d = (Graphics2D)g;
 
 
for (int y = 0; y <= mapy; y++){
    for (int x = 0; x <= mapy; x++){
 
        int L = x * 64;
        int U = y * 64;
        int R = 64;
        int D = 64;
           /// g2d.rotate(Math.toRadians(-90));
 
        if (map[x][y] == 1){
            g2d.setColor(Color.green);
            g2d.fillRect(L, U, R, D);
            g2d.setColor(Color.black);
            g2d.fillRect(L+64, U, 8, 64);
 
        }
 
    }
 
}
 
     }
    public static void main(String[] args) {
       new Test();
    }
}

Could someone explain whye did this happened?

Originally Posted by Norm

Can you explain how the 1s in the array are supposed to control what is drawn?

I dont understand what you mean?

--- Update ---

Ok i understood it now, but how should i fix it?
Ok nevermind. just fixed it by writing map[y][x]