From Forum Nokia Wiki

Introduction

Since MIDP 1.0 does not natively support image rotating, here's a useful method to rotate images in J2ME. It currently supports rotations of 90°, 180° and 270° (and, of course, 0° rotations :)).

Source code: rotateImage method

public static Image rotateImage(Image image, int angle) throws Exception
{
	if(angle == 0)
	{
		return image; 
	}
	else if(angle != 180 && angle != 90 && angle != 270)
	{
		throw new Exception("Invalid angle");
	}
	
	int width = image.getWidth();
	int height = image.getHeight();
 
	int[] rowData = new int[width];
	int[] rotatedData = new int[width * height];
 
	int rotatedIndex = 0;
	
	for(int i = 0; i < height; i++)
	{
		image.getRGB(rowData, 0, width, 0, i, width, 1);
 
		for(int j = 0; j < width; j++)
		{
			rotatedIndex = 
				angle == 90 ? (height - i - 1) + j * height : 
				(angle == 270 ? i + height * (width - j - 1) : 
					width * height - (i * width + j) - 1
				);
			
			rotatedData[rotatedIndex] = rowData[j];
		}
	}
	
	if(angle == 90 || angle == 270)
	{
		return Image.createRGBImage(rotatedData, height, width, true);
	}
	else
	{
		return Image.createRGBImage(rotatedData, width, height, true);
	}
}

Source code: sample usage

Here's a sample usage on how to use the rotateImage() method:

Image original = Image.createImage("/original_image.png");
 
Image rotated_image = rotateImage(original, 90);