Rotating image using Java 2D AffineTransform class

   

import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Rectangle;
import java.awt.geom.AffineTransform;

import javax.swing.JPanel;

class ImagePanel extends JPanel {
  int offset = 5;

  private Image image;

  private int angle;

  private int w, h;

  private AffineTransform transform;

  public ImagePanel(Image i) {
    image = i;
    w = image.getWidth(this);
    h = image.getHeight(this);
    transform = new AffineTransform();
  }

  public void paintComponent(Graphics grp) {
    Rectangle rect = this.getBounds();
    Graphics2D g2d = (Graphics2D) grp;
    transform.setToTranslation((rect.width - w) / 2,
        (rect.height - h) / 2);

    transform.rotate(Math.toRadians(angle), w / 2,
        h / 2);

    g2d.drawImage(image, transform, this);
  }

  public void rotate() {
    angle -= offset;
    if (angle <= 0) {
      angle = 360;
    }
    repaint();
  }
}

1.	Coordinate Demo
2.	Rotation and coordinate translation
3.	Scaling an object
4.	Transform Demo
5.	Transform Shear
6.	Transform Scale
7.	Transform Rotation Translation
8.	Transforme Rotation demo
9.	Transform Translation and Rotation
10.	Transform Translated Rotation
11.	Transform Translation
12.	Line transformation, rotation, shear,scale
13.	AffineTransform demo
14.	Scaling a Drawn Image
15.	Shearing a Drawn Image
16.	Translating a Drawn Image
17.	Rotating a Drawn Image
18.	Create an complex shape by rotating an ellipse.
19.	Scaling a Shape with AffineTransform
20.	Shearing a Shape with AffineTransform
21.	Perform shearing: use share() method.
22.	Translating a Shape with AffineTransform
23.	Rotating a Shape with AffineTransform
24.	Rotates a shape about the specified coordinates.
25.	Resizes or translates a Shape
26.	Creates and returns a translated shape.

Rotating image using Java 2D AffineTransform class : Transform « 2D Graphics GUI « Java

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