Demonstrating some Java 2D shapes. - Java 2D Graphics

Java examples for 2D Graphics:Shape

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Description

Demonstrating some Java 2D shapes.

Demo Code

import javax.swing.JFrame;
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;

 class ShapesJPanel extends JPanel 
{
   // draw shapes with Java 2D API
   @Override//from   w  w w.ja  va 2 s. c o m
   public void paintComponent(Graphics g)
   {
      super.paintComponent(g); 
      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 buffImage and draw on it
      Graphics2D gg = buffImage.createGraphics();   
      gg.setColor(Color.YELLOW); 
      gg.fillRect(0, 0, 10, 10); 
      gg.setColor(Color.BLACK);  
      gg.drawRect(1, 1, 6, 6); 
      gg.setColor(Color.BLUE); 
      gg.fillRect(1, 1, 3, 3); 
      gg.setColor(Color.RED); 
      gg.fillRect(4, 4, 3, 3); 

      // 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));
   } 
}

public class Main
{
   // execute application
   public static void main(String[] args)
   {
      // create frame for ShapesJPanel
      JFrame frame = new JFrame("Drawing 2D shapes");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

      // create ShapesJPanel
      ShapesJPanel shapesJPanel = new ShapesJPanel();
      frame.add(shapesJPanel); 
      frame.setSize(425, 200);
      frame.setVisible(true);
   } 
}

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