Drawing Rectangles in Java

Question

I am trying to draw rectangles in Java like this picture:

I visualize the coordinates as I do at math but I come up with the rectangles turned upside down which is like this:

I know Im missing just a few things.What should I do? (Colors will be edited)

 public class BlockTower
{
public static void main(String[] args)
{

    Rectangle rect1 = new Rectangle(20, 70, 40, 30);
    rect1.draw();
    rect1.setColor(Color.BLUE);
    rect1.fill();

    Rectangle rect2 = new Rectangle(60, 70, 40, 30);
    rect2.draw();
    rect2.setColor(Color.MAGENTA);
    rect2.fill();

    Rectangle rect3 = new Rectangle(100, 70, 40, 30);
    rect3.draw();
    rect3.setColor(Color.CYAN);
    rect3.fill();

    Rectangle rect4 = new Rectangle(40, 100, 40, 30);
    rect4.draw();
    rect4.setColor(Color.RED);
    rect4.fill();

    Rectangle rect5 = new Rectangle(80, 100, 40, 30);
    rect5.draw();
    rect5.setColor(Color.PINK);
    rect5.fill();

    Rectangle rect6 = new Rectangle(60, 130, 40, 30);
    rect6.draw();
    rect6.setColor(Color.BLUE);
    rect6.fill();



    //TODO finish the draft to display the six blocks
  }
}

@S.Sahin Your question could be classified as java question because there is no connection with android. Just pure java code. — deadfish, May 03 '17 at 22:17

QBrute · Answer 1 · 2017-05-03T22:00:13.067

1

Coordinates in Swing start from Top Left. That means you have to recalculate your y-coordinates. So the bottom of your panel is actually at the current height.

If you've calculated something to be at coordinates (x,y) it now has to be at coordinates (x, height - y) instead.

edited May 03 '17 at 22:00

answered May 03 '17 at 21:52

QBrute

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Now I get it thanks.I need to ask something.Whats wrong with my question? I am not comfortable asking questions here.When I post a new question people starts complaining and downvoting. – SametSahin May 03 '17 at 22:03
1

@S.Sahin Part of the problem with this question in particular, is the fact that the documentation and available tutorials would have answered your question, or at least provided you with the enough information to ascertain the cause of your problem. There's also little or no information about the APIs you are using, it's impossible from the code to determine if you're using a third party API, Swing, AWT, GWT or some other framework – MadProgrammer May 03 '17 at 22:53

Drawing Rectangles in Java

1 Answers1