Java 2D graphics help

Question

Hi, i need 2 files, Index class file(JFrame) and a Draw.class file
Basically, i have a button in the index jframe form, and when i clicked on the button, there will be a JPanel/ Applet pop up, with a circle in it. can any1 write me some sample codes? a simple one will do. Thanks

Answer 1

import java.awt.Color;
import java.awt.Graphics;
import java.awt.BasicStroke;
import java.awt.GradientPaint;
import java.awt.TexturePaint;
import java.awt.Rectangle;
import java.awt.Graphics2D;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Rectangle2D;
import java.awt.geom.RoundRectangle2D;
import java.awt.geom.Arc2D;
import java.awt.geom.Line2D;
import java.awt.image.BufferedImage;
import javax.swing.JPanel;
public class ShapesJPanel extends JPanel
   // draw shapes with Java 2D API
   public void paintComponent( Graphics g )
      super.paintComponent( g ); // call superclass's paintComponent
      Graphics2D g2d = ( Graphics2D ) g; // cast g to Graphics2D
      // draw 2D ellipse filled with a blue-yellow gradient
      g2d.setPaint( new GradientPaint( 5, 30, Color.BLUE, 35, 100,
         Color.YELLOW, true ) ); 
      g2d.fill( new Ellipse2D.Double( 5, 30, 65, 100 ) );
      // draw 2D rectangle in red
      g2d.setPaint( Color.RED );                 
      g2d.setStroke( new BasicStroke( 10.0f ) );
      g2d.draw( new Rectangle2D.Double( 80, 30, 65, 100 ) );
      // draw 2D rounded rectangle with a buffered background
      BufferedImage buffImage = new BufferedImage( 10, 10,
         BufferedImage.TYPE_INT_RGB );
      // obtain Graphics2D from bufferImage and draw on it
      Graphics2D gg = buffImage.createGraphics();  
      gg.setColor( Color.YELLOW ); // draw in yellow
      gg.fillRect( 0, 0, 10, 10 ); // draw a filled rectangle
      gg.setColor( Color.BLACK );  // draw in black
      gg.drawRect( 1, 1, 6, 6 ); // draw a rectangle
      gg.setColor( Color.BLUE ); // draw in blue
      gg.fillRect( 1, 1, 3, 3 ); // draw a filled rectangle
      gg.setColor( Color.RED ); // draw in red
      gg.fillRect( 4, 4, 3, 3 ); // draw a filled rectangle
      // paint buffImage onto the JFrame
      g2d.setPaint( new TexturePaint( buffImage,
         new Rectangle( 10, 10 ) ) );
      g2d.fill(
         new RoundRectangle2D.Double( 155, 30, 75, 100, 50, 50 ) );
      // draw 2D pie-shaped arc in white
      g2d.setPaint( Color.WHITE );
      g2d.setStroke( new BasicStroke( 6.0f ) );
      g2d.draw(
         new Arc2D.Double( 240, 30, 75, 100, 0, 270, Arc2D.PIE ) );
      // draw 2D lines in green and yellow
      g2d.setPaint( Color.GREEN );
      g2d.draw( new Line2D.Double( 395, 30, 320, 150 ) );
      // draw 2D line using stroke
      float dashes[] = { 10 }; // specify dash pattern
      g2d.setPaint( Color.YELLOW );   
      g2d.setStroke( new BasicStroke( 4, BasicStroke.CAP_ROUND,
         BasicStroke.JOIN_ROUND, 10, dashes, 0 ) );
      g2d.draw( new Line2D.Double( 320, 30, 395, 150 ) );
   } // end method paintComponent
} // end class ShapesJPanelbasically.. when i click on a button in the index class file, it will call this class file, i do not know to code to call this class file.
Edited by: slaydragon on Nov 11, 2007 10:55 AM