Java tutorial
import java.awt.Frame; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.geom.AffineTransform; public class AffineTransformGetRotateInstance extends Frame { public static void main(String[] args) { (new AffineTransformGetRotateInstance()).setVisible(true); } public AffineTransformGetRotateInstance() { setSize(350, 300); } public void paint(Graphics g) { AffineTransform atrans = null; Graphics2D g2d = (Graphics2D) g; atrans = AffineTransform.getRotateInstance(Math.PI / 4, 50, 50); if (atrans != null) g2d.setTransform(atrans); g2d.fillRect(50, 50, 100, 50); } }