Java using in display different shapes and transparent cursor

Display different shapes

import java.awt.Shape;

import java.awt.geom.*;

public class Main

 {

   public static void main(String[] args) 

  {

      int x1 = 1, x2 = 2, w = 3, h = 4, 

      x = 5, y = 6, 

                  y1 = 1, y2 = 2, start = 3;

      Shape line = new Line2D.Float(x1, y1, x2, y2);

      Shape arc = new Arc2D.Float(x, y, w, h, start, 1, 1);

      Shape oval = new Ellipse2D.Float(x, y, w, h);

      Shape rectangle = new Rectangle2D.Float(x, y, w, h);

                  Shape roundRectangle = new RoundRectangle2D.Float(x, y, w, h, 1, 2);

      System.out.println("Different shapes are created:");

   }

}

Display different shapes

import java.awt.Graphics;

import javax.swing.JFrame;

import javax.swing.JPanel;

            public class Main extends JPanel 

{

            public static void main(String[] a) 

   {

      JFrame f = new JFrame();

      f.setSize(400, 400);

      f.add(new Main());

      f.setDefaultCloseOperation(JFrame.Exit_on_close);

      f.setVisible(true);

   }

                public void paint(Graphics g) 

                {

      g.fillRect (5, 15, 50, 75);

   }

}

Create a transparent cursor

import java.awt.*;

import java.awt.image.MemoryImageSource;

            public class Main 

{

   public static void main(String[] argv) throws Exception 

  {

      int[] pixels = new int[16 * 16];

      Image image = Toolkit.getDefaultToolkit().createImage(

      new MemoryImageSource(16, 16, pixels, 0, 16));

      Cursor transparentCursor = Toolkit.getDefaultToolkit().

      createCustomCursor(image, new Point(0, 0), "invisibleCursor");

      System.out.println("Transparent Cursor created.");

   }

}