Source Code : Draw with Line2D.Double and Ellipse2D.Double

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Draw with Line2D.Double and Ellipse2D.Double

 

/*
 This program is a part of the companion code for Core Java 8th ed.
 (http://horstmann.com/corejava)

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;

import javax.swing.JComponent;
import javax.swing.JFrame;

/**
 * @version 1.32 2007-04-14
 * @author Cay Horstmann
 */
public class DrawTest {
  public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
      public void run() {
        DrawFrame frame = new DrawFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
      }
    });
  }
}

/**
 * A frame that contains a panel with drawings
 */
class DrawFrame extends JFrame {
  public DrawFrame() {
    setTitle("DrawTest");
    setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);

    // add panel to frame

    DrawComponent component = new DrawComponent();
    add(component);
  }

  public static final int DEFAULT_WIDTH = 400;

  public static final int DEFAULT_HEIGHT = 400;
}

/**
 * A component that displays rectangles and ellipses.
 */
class DrawComponent extends JComponent {
  public void paintComponent(Graphics g) {
    Graphics2D g2 = (Graphics2D) g;

    // draw a rectangle

    double leftX = 100;
    double topY = 100;
    double width = 200;
    double height = 150;

    Rectangle2D rect = new Rectangle2D.Double(leftX, topY, width, height);
    g2.draw(rect);

    // draw the enclosed ellipse

    Ellipse2D ellipse = new Ellipse2D.Double();
    ellipse.setFrame(rect);
    g2.draw(ellipse);

    // draw a diagonal line

    g2.draw(new Line2D.Double(leftX, topY, leftX + width, topY + height));

    // draw a circle with the same center

    double centerX = rect.getCenterX();
    double centerY = rect.getCenterY();
    double radius = 150;

    Ellipse2D circle = new Ellipse2D.Double();
    circle.setFrameFromCenter(centerX, centerY, centerX + radius, centerY + radius);
    g2.draw(circle);
  }
}

   
  

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