Draw various shapes - Java 2D Graphics

Java examples for 2D Graphics:Shape

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Description

Draw various shapes

Demo Code

import java.awt.BasicStroke;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.RenderingHints;
import java.awt.Shape;
import java.awt.geom.Arc2D;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;
import java.awt.geom.RoundRectangle2D;
import java.util.ArrayList;

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

public class ShapeMaker extends JFrame {

  public static void main(String[] args) {
    new ShapeMaker();
  }/* w  w w  . java2  s.c o  m*/

  public ShapeMaker() {
    this.setSize(300, 300);
    this.setTitle("Shape Maker");
    this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    this.add(new PaintSurface(), BorderLayout.CENTER);
    this.setVisible(true);
  }
}
class PaintSurface extends JComponent {
  ArrayList<Shape> shapes = new ArrayList<Shape>();
  Point startDrag, endDrag;
  Shape found = null;

  public PaintSurface() {
    Shape s;

    // a rectangle
    s = new Rectangle2D.Float(10, 10, 60, 80);
    shapes.add(s);

    // a rounded rectangle
    s = new RoundRectangle2D.Float(110, 10, 80, 80, 10, 10);
    shapes.add(s);

    // a rounded rectangle
    s = new RoundRectangle2D.Float(210, 10, 60, 80, 50, 75);
    shapes.add(s);

    // a circle
    s = new Ellipse2D.Float(10, 110, 80, 80);
    shapes.add(s);

    // an ellipse
    s = new Ellipse2D.Float(110, 110, 80, 40);
    shapes.add(s);

    // another ellipse
    s = new Ellipse2D.Float(210, 110, 40, 80);
    shapes.add(s);

    // an arc
    s = new Arc2D.Float(10, 210, 80, 80, 90, 90, Arc2D.OPEN);
    shapes.add(s);

    // another arc
    s = new Arc2D.Float(110, 210, 80, 80, 0, 180, Arc2D.CHORD);
    shapes.add(s);

    // another arc
    s = new Arc2D.Float(210, 210, 80, 80, 45, 90, Arc2D.PIE);
    shapes.add(s);
  }

  public void paint(Graphics g) {
    Graphics2D g2 = (Graphics2D) g;

    // turn on antialiasing
    g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

    // draw background grid
    g2.setPaint(Color.LIGHT_GRAY);
    for (int i = 0; i < getSize().width; i += 10)
      g2.draw(new Line2D.Float(i, 0, i, getSize().height));

    for (int i = 0; i < getSize().height; i += 10)
      g2.draw(new Line2D.Float(0, i, getSize().width, i));

    // draw all the shapes in the array list
    g2.setColor(Color.BLACK);
    g2.setStroke(new BasicStroke(5));
    for (Shape s : shapes)
      g2.draw(s);
  }
}

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