// LineDraw - Nick Taylor (14.10.2003)

// Import the Abstract Windows Toolkit
import java.awt.*;

// Import the event handler package so we can close the program neatly
import java.awt.event.*;

// Import geom package for Java 2D
import java.awt.geom.*;

public class LineDraw extends Frame
{
   LineDraw()
   {
      // Make sure we can close the window with the appropriate button click
      addWindowListener(new WindowAdapter()
      {public void windowClosing(WindowEvent e) {System.exit(0);}});
   }

   public static void main (String[] args)
   {
      // Make a Frame -line2D-
      LineDraw line2D = new LineDraw();

      // Frame size will be 200x200 *including* title bar and borders
      line2D.setSize(200,200);

      // Make the Frame visible
      line2D.setVisible(true);
   }

   public void paint (Graphics g)
   {
   /* paint() will be called whenever the display needs updating.
      It requires an old-style graphics object -g- and we cast it
      to a proper Graphics2D object -gg- so we can manipulate it */

      Graphics2D gg = (Graphics2D) g;

      /* Create a shape -lineShape- which is a 2D line defined by two
         end points (x1,y1,x2,y2) all Floats here but could be Doubles */

      Shape lineShape = new Line2D.Float(10,30,180,190);

      // Finally draw the object -lineShape- 

      gg.draw(lineShape);
   }
}