Effects : Shape « 2D Graphics GUI « Java



import java.awt.AlphaComposite;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.Font;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.font.FontRenderContext;
import java.awt.font.TextLayout;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.InputStream;

import javax.swing.JFrame;

import com.sun.image.codec.jpeg.ImageFormatException;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageDecoder;

public class ShowOff extends Component {
  public static void main(String[] args) {
    try {
      String filename = "largeJava2sLogo.jpg";
      String message = "Java Source and Support";
      int split = 4;
      JFrame f = new JFrame();
      f.getContentPane().setLayout(new BorderLayout());
      ShowOff showOff = new ShowOff(filename, message, split);
      f.add(showOff, BorderLayout.CENTER);
    } catch (Exception e) {

  private BufferedImage mImage;

  private Font mFont;

  private String mMessage;

  private int mSplit;

  private TextLayout mLayout;

  public ShowOff(String filename, String message, int split)
      throws IOException, ImageFormatException {

    InputStream in = getClass().getResourceAsStream(filename);
    JPEGImageDecoder decoder = JPEGCodec.createJPEGDecoder(in);
    mImage = decoder.decodeAsBufferedImage();

    mFont = new Font("Serif", Font.PLAIN, 116);

    mMessage = message;
    mSplit = split;

    setSize((int) mImage.getWidth(), (int) mImage.getHeight());

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



  protected void drawBackground(Graphics2D g2) {
    int side = 45;
    int width = getSize().width;
    int height = getSize().height;
    Color[] colors = { Color.yellow, Color.cyan, Color.orange, Color.pink,
        Color.magenta, Color.lightGray };
    for (int y = 0; y < height; y += side) {
      for (int x = 0; x < width; x += side) {
        Ellipse2D ellipse = new Ellipse2D.Float(x, y, side, side);
        int index = (x + y) / side % colors.length;

  protected void drawImageMosaic(Graphics2D g2) {
    int side = 36;
    int width = mImage.getWidth();
    int height = mImage.getHeight();
    for (int y = 0; y < height; y += side) {
      for (int x = 0; x < width; x += side) {
        float xBias = (float) x / (float) width;
        float yBias = (float) y / (float) height;
        float alpha = 1.0f - Math.abs(xBias - yBias);
            AlphaComposite.SRC_OVER, alpha));
        int w = Math.min(side, width - x);
        int h = Math.min(side, height - y);
        BufferedImage tile = mImage.getSubimage(x, y, w, h);
        g2.drawImage(tile, x, y, null);

  protected void drawText(Graphics2D g2) {
    FontRenderContext frc = g2.getFontRenderContext();
    mLayout = new TextLayout(mMessage, mFont, frc);
    int width = getSize().width;
    int height = getSize().height;
    Rectangle2D bounds = mLayout.getBounds();
    double x = (width - bounds.getWidth()) / 2;
    double y = height - bounds.getHeight();
    drawString(g2, x, y, 0);
    drawString(g2, width - bounds.getHeight(), y, -Math.PI / 2);

  protected void drawString(Graphics2D g2, double x, double y, double theta) {
    g2.translate(x, y);
    String first = mMessage.substring(0, mSplit);
    float width = drawBoxedString(g2, first, Color.white, Color.red, 0);
    String second = mMessage.substring(mSplit);
    drawBoxedString(g2, second, Color.blue, Color.white, width);
    g2.translate(-x, -y);

  protected float drawBoxedString(Graphics2D g2, String s, Color c1,
      Color c2, double x) {
    FontRenderContext frc = g2.getFontRenderContext();
    TextLayout subLayout = new TextLayout(s, mFont, frc);
    float advance = subLayout.getAdvance();

    GradientPaint gradient = new GradientPaint((float) x, 0, c1,
        (float) (x + advance), 0, c2);
    Rectangle2D bounds = mLayout.getBounds();
    Rectangle2D back = new Rectangle2D.Double(x, 0, advance, bounds

    g2.drawString(s, (float) x, (float) -bounds.getY());
    return advance;


Related examples in the same category

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2.fillRect (int, int, int, int) method draws a solid rectangle
3.Creating a Shape Using Lines and Curves
4.Combining Shapes
5.Draw rectangles, use the drawRect() method. To fill rectangles, use the fillRect() method
6.Draw lineDraw line
7.Draw a PolygonDraw a Polygon
8.Draw an oval outline
9.Draw a (Round)rectangleDraw a (Round)rectangle
10.Fill a polygonFill a polygon
11.Fill a solid oval
12.Fill a (Round)rectangleFill a (Round)rectangle
13.Change fontChange font
14.Draw rectangle 2Draw rectangle 2
15.Draw ArcDraw Arc
16.Draw EllipseDraw Ellipse
17.Fill a Rectangle 2Fill a Rectangle 2
18.Fill Arc 2Fill Arc 2
19.Draw textDraw text
20.Draw unicode string Draw unicode string
21.Shape combineShape combine
22.Mouse drag and drop to drawMouse drag and drop to draw
23.Arc demonstration: scale, move, rotate, sheerArc demonstration: scale, move, rotate, sheer
24.Hypnosis SpiralHypnosis Spiral
26.Resize a shape
27.Rectangle with rounded corners drawn using Java 2D Graphics API
28.Compares two ellipses and returns true if they are equal or both null.
29.Compares two lines are returns true if they are equal or both null.
30.Creates a diagonal cross shape.
31.Creates a diamond shape.
32.Creates a new Stroke-Object for the given type and with.
33.Creates a region surrounding a line segment by 'widening' the line segment.
34.Creates a triangle shape that points downwards.
35.Creates a triangle shape that points upwards.
36.Generate Polygon
37.Polygon with float coordinates.
38.Polyline 2D
39.Serialises a Shape object.
40.Tests two polygons for equality. If both are null this method returns true.
41.Union two rectangles
42.Calculate Intersection Clip
43.Draws a shape with the specified rotation about (x, y).
44.Checks, whether the given rectangle1 fully contains rectangle 2 (even if rectangle 2 has a height or width of zero!).
45.Reads a Point2D object that has been serialised by the writePoint2D(Point2D, ObjectOutputStream)} method.
46.Returns a point based on (x, y) but constrained to be within the bounds of a given rectangle.
47.RectListManager is a class to manage a list of rectangular regions.
48.Fill Rectangle2D.Double and Ellipse2D.DoubleFill Rectangle2D.Double and Ellipse2D.Double
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