Originally Posted by sciwizeh

ok, I wrote these two classes CustomPane is the one that has the rotateImage() method.

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java Syntax (Toggle Plain Text)

//CustomPane.java
import javax.swing.* ;
import java.awt.* ;
import java.awt.image.* ;
 
public class CustomPane extends JPanel {
	String str ;
	BufferedImage original = new BufferedImage ( 200 , 50 ,
			BufferedImage.TYPE_INT_ARGB ) ;
	BufferedImage after ;
	double A = 0 ;
	double dA = 2 * Math.PI / 180 ;
 
	public CustomPane ( ) {
		this ( "Hello World" ) ;
	}
 
	public CustomPane ( String s ) {
		str = s ;
		Graphics g = original.getGraphics ( ) ;
		g.setColor ( new Color ( 0 , 0 , 0 , 1 ) ) ;
		g.fillRect ( 0 , 0 , original.getWidth ( ) , original.getHeight ( ) ) ;
		g.setColor ( new Color ( 0 , 0 , 0 , 255 ) ) ;
		g.drawString ( str , 10 , 10 ) ;
	}
 
	@ Override public void paint ( Graphics g ) {
		A += dA ;
		if ( A >= Math.PI/2 ) {
			A -= Math.PI/2 ;
		}
		g.setColor(new Color(255,255,255));
		after = rotateImage ( original , A );
		g.fillRect ( 0 , 0 , original.getWidth ( ) , after.getHeight ( ) ) ;
		g.drawImage (after  , 10 , 10 , null ) ;
	}
 
	public static BufferedImage rotateImage ( BufferedImage bi ,
			double angleRads ) {
		double cosA = Math.cos ( angleRads ) ;
		double sinA = Math.sin ( angleRads ) ;
		BufferedImage nbi = new BufferedImage ( ( int ) Math.abs ( ( bi
				.getWidth ( )
				* cosA + bi.getHeight ( ) * sinA ) ) , ( int ) Math.abs ( ( bi
				.getHeight ( )
				* cosA + bi.getWidth ( ) * sinA ) ) ,
				BufferedImage.TYPE_INT_ARGB ) ;
		Graphics g = nbi.getGraphics ( ) ;
		g.setColor ( new Color ( 0 , 0 , 0 , 0 ) ) ;
		g.fillRect ( 0 , 0 , nbi.getWidth ( ) , nbi.getHeight ( ) ) ;
		for ( int x = 0 ; x < nbi.getWidth ( ) ; x ++ ) {
			for ( int y = 0 ; y < nbi.getHeight ( ) ; y ++ ) {
				try {
					nbi.setRGB ( ( int ) x , ( int ) y , bi.getRGB (
							( int ) ( x * cosA + y * sinA ) , ( int ) ( y
									* cosA - x * sinA ) ) ) ;
				} catch ( Exception e ) {}
			}
		}
		return nbi ;
	}
}

//CustomPane.java import javax.swing.* ; import java.awt.* ; import java.awt.image.* ; public class CustomPane extends JPanel { String str ; BufferedImage original = new BufferedImage ( 200 , 50 , BufferedImage.TYPE_INT_ARGB ) ; BufferedImage after ; double A = 0 ; double dA = 2 * Math.PI / 180 ; public CustomPane ( ) { this ( "Hello World" ) ; } public CustomPane ( String s ) { str = s ; Graphics g = original.getGraphics ( ) ; g.setColor ( new Color ( 0 , 0 , 0 , 1 ) ) ; g.fillRect ( 0 , 0 , original.getWidth ( ) , original.getHeight ( ) ) ; g.setColor ( new Color ( 0 , 0 , 0 , 255 ) ) ; g.drawString ( str , 10 , 10 ) ; } @ Override public void paint ( Graphics g ) { A += dA ; if ( A >= Math.PI/2 ) { A -= Math.PI/2 ; } g.setColor(new Color(255,255,255)); after = rotateImage ( original , A ); g.fillRect ( 0 , 0 , original.getWidth ( ) , after.getHeight ( ) ) ; g.drawImage (after , 10 , 10 , null ) ; } public static BufferedImage rotateImage ( BufferedImage bi , double angleRads ) { double cosA = Math.cos ( angleRads ) ; double sinA = Math.sin ( angleRads ) ; BufferedImage nbi = new BufferedImage ( ( int ) Math.abs ( ( bi .getWidth ( ) * cosA + bi.getHeight ( ) * sinA ) ) , ( int ) Math.abs ( ( bi .getHeight ( ) * cosA + bi.getWidth ( ) * sinA ) ) , BufferedImage.TYPE_INT_ARGB ) ; Graphics g = nbi.getGraphics ( ) ; g.setColor ( new Color ( 0 , 0 , 0 , 0 ) ) ; g.fillRect ( 0 , 0 , nbi.getWidth ( ) , nbi.getHeight ( ) ) ; for ( int x = 0 ; x < nbi.getWidth ( ) ; x ++ ) { for ( int y = 0 ; y < nbi.getHeight ( ) ; y ++ ) { try { nbi.setRGB ( ( int ) x , ( int ) y , bi.getRGB ( ( int ) ( x * cosA + y * sinA ) , ( int ) ( y * cosA - x * sinA ) ) ) ; } catch ( Exception e ) {} } } return nbi ; } }

Help with Code Tags

java Syntax (Toggle Plain Text)

//RotateText.java
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import javax.swing.*;
import javax.swing.event.*;
import java.util.concurrent.*;
public class RotateText extends JFrame implements Runnable
{
    CustomPane c = new CustomPane("This text will be rotated");
    public RotateText()
    {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(200,200);
        this.add(c);
        c.repaint();
        setVisible(true);
        ScheduledThreadPoolExecutor exec = new ScheduledThreadPoolExecutor(3);
        exec.scheduleAtFixedRate(this,0L,33L,TimeUnit.MILLISECONDS);
    }
    public static void main(String[] args){
        new RotateText();
    }
    public void run(){
        c.repaint();
    }
}

//RotateText.java import java.awt.*; import java.awt.event.*; import java.awt.geom.*; import javax.swing.*; import javax.swing.event.*; import java.util.concurrent.*; public class RotateText extends JFrame implements Runnable { CustomPane c = new CustomPane("This text will be rotated"); public RotateText() { setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setSize(200,200); this.add(c); c.repaint(); setVisible(true); ScheduledThreadPoolExecutor exec = new ScheduledThreadPoolExecutor(3); exec.scheduleAtFixedRate(this,0L,33L,TimeUnit.MILLISECONDS); } public static void main(String[] args){ new RotateText(); } public void run(){ c.repaint(); } }

this example is of an animated rotating sentence, as i said this method is very slow, and inaccurate i hope that it is clear what i did. mostly basic trig.