public class MyMousePanel extends JPanel implements MouseListener{

    public static MyMousePanel inst;
    int x1,x2,y1,y2;
    int[] start = new int[2];

    int[] end = new int[2];


   MyMousePanel()
    {
        setBackground(Color.WHITE);
        addMouseListener(this);
    }
    public static MyMousePanel getInstance()
    {
        if(inst == null)
            inst =  new MyMousePanel();
         return inst;

    }



    public void mouseExited(MouseEvent e)
    {

    }
    public void mouseEntered(MouseEvent e)
    {

    }
    public void mouseClicked(MouseEvent e)
    {

    }
    public void mousePressed(MouseEvent e)
    {
       x1 = e.getX();
       y1 = e.getY();
       System.out.println(x1+" "+y1);
    }
    public void mouseReleased(MouseEvent e)
    {
       x2 = e.getX();
       y2 = e.getY();
       System.out.println(x2+" "+y2);
       DrawingClass.getInstance();

       repaint();
    }

    public int[] setStart()
    {
        if(x2>=x1 && y2>=y1)
        {
            start[0] = x1;
            start[1] = y2;
        }
        if(x2>=x1 && y1>=y2)
        {
            start[0] = x1;
            start[1] = y1;
        }
        if(x1>x2 && y1>y2)
        {
            start[0] = x2;
            start[1] = y2;
        }
        if(x1>x2 && y2>y1)
        {
            start[0] = x2;
            start[1] = y1;
        }

        return start;
    }

    public int[] setEnd()
    {
        if(x2>=x1 && y2>=y1)
        {
            end[0] = x2;
            end[1] = y1;
        }
        if(x2>=x1 && y1>=y2)
        {
            end[0] = x1;
            end[1] = y1;
        }
        if(x1>x2 && y1>y2)
        {
            end[0] = x2;
            end[1] = y2;
        }
        if(x1>x2 && y2>y1)
        {
            end[0] = x2;
            end[1] = y1;
        }

        return end;
    }