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    <p>+1 to MadProgrammers comment and link.</p> <p>Using the method from link (edited slightly to omit use of <code>GraphicsConfiguration</code>, <code>drawRenderImage(..)</code> and changed variable names):</p> <pre><code>//https://stackoverflow.com/questions/4156518/rotate-an-image-in-java public static BufferedImage createTransformedImage(BufferedImage image, double angle) { double sin = Math.abs(Math.sin(angle)); double cos = Math.abs(Math.cos(angle)); int originalWidth = image.getWidth(); int originalHeight = image.getHeight(); int newWidth = (int) Math.floor(originalWidth * cos + originalHeight * sin); int newHeight = (int) Math.floor(originalHeight * cos + originalWidth * sin); BufferedImage rotatedBI = new BufferedImage(newWidth, newHeight, BufferedImage.TRANSLUCENT); Graphics2D g2d = rotatedBI.createGraphics(); g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2d.translate((newWidth - originalWidth) / 2, (newHeight - originalHeight) / 2); g2d.rotate(angle, originalWidth / 2, originalHeight / 2); g2d.drawImage(image, 0, 0, null); g2d.dispose(); return rotatedBI; } </code></pre> <p>Here is an example:</p> <p><img src="https://i.stack.imgur.com/0Xf41.png" alt="enter image description here"></p> <pre><code>import java.awt.Color; import java.awt.Dimension; import java.awt.Font; import java.awt.FontMetrics; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.RenderingHints; import java.awt.image.BufferedImage; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.SwingUtilities; public class RotateImage { public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { @Override public void run() { JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.add(new MyRotatableImage(createImage(), -45)); frame.pack(); frame.setVisible(true); } }); } public static BufferedImage createImage() { BufferedImage img = new BufferedImage(100, 50, BufferedImage.TRANSLUCENT); Graphics2D g2d = img.createGraphics(); g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2d.setColor(Color.WHITE); g2d.fillRect(0, 0, img.getWidth(), img.getHeight()); g2d.setColor(Color.BLACK); g2d.setFont(new Font("Calibri", Font.BOLD, 20)); FontMetrics fm = g2d.getFontMetrics(); String text = "Hello world"; int textWidth = fm.stringWidth(text); g2d.drawString(text, (img.getWidth() / 2) - textWidth / 2, img.getHeight() / 2); g2d.dispose(); return img; } } class MyRotatableImage extends JPanel { private BufferedImage transformedImage; public MyRotatableImage(BufferedImage img, int angle) { transformedImage = createTransformedImage(img, angle); } @Override public void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2d = (Graphics2D) g; g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2d.drawImage(transformedImage, 0, 0, null); } @Override public Dimension getPreferredSize() { return new Dimension(transformedImage.getWidth(), transformedImage.getHeight()); } //https://stackoverflow.com/questions/4156518/rotate-an-image-in-java public static BufferedImage createTransformedImage(BufferedImage image, double angle) { double sin = Math.abs(Math.sin(angle)); double cos = Math.abs(Math.cos(angle)); int originalWidth = image.getWidth(); int originalHeight = image.getHeight(); int newWidth = (int) Math.floor(originalWidth * cos + originalHeight * sin); int newHeight = (int) Math.floor(originalHeight * cos + originalWidth * sin); BufferedImage rotatedBI = new BufferedImage(newWidth, newHeight, BufferedImage.TRANSLUCENT); Graphics2D g2d = rotatedBI.createGraphics(); g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2d.translate((newWidth - originalWidth) / 2, (newHeight - originalHeight) / 2); g2d.rotate(angle, originalWidth / 2, originalHeight / 2); g2d.drawImage(image, 0, 0, null); g2d.dispose(); return rotatedBI; } } </code></pre> <p><strong>Reference:</strong></p> <ul> <li><a href="https://stackoverflow.com/questions/4156518/rotate-an-image-in-java">Rotate an image in java</a></li> </ul>
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    1. COIt is interesting example thank you, but I was about not to use BufferedImage rotatedBI = new BufferedImage(...); every time is there a way to avoid new object creation on each repaint?
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    2. CO@user592704 my example does not use it every repaint you should transform it once and use that transformed image if you must transform on each rotate than you have no choice but to do that well IMO its not going to save you much more CPU/GPU time to do it another way. Rather learn to use `repaint(int x,int y,int w,int h)` to refine the drawing process as seen here: [Refining the Design](http://docs.oracle.com/javase/tutorial/uiswing/painting/refining.html)
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    3. COI can see that but it is not quite interesting to set tilt once with a text field or something what if to use JSlider to visualize rotate process it in real time for example? Actually the overriden paintComponent is really used for :S The snippet you show is really good I'll try it a little bit later but still I'd like to avoid creating new object each repaint, anyway, but for now I am not pretty sure how to do that in a more optimal way :)
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