AWT og Unix, Linux - NoClassDefFoundError eks på billedescalering

Dette er ikke et spørgsmål men blot et eksempel på, hvordan man kan skalerer et billede uden at få det klassiske problem med brug af AWT klasser på en unix eller fx linux maskine, hvor man ikke lige kan komme til at sætte headless=true.

import java.io.*;
import javax.imageio.*;
import java.awt.image.*;
import java.awt.geom.*;
import java.awt.RenderingHints;

public class AffineThumbnail
{
    public AffineThumbnail(String srcFileName,String destFileName,int thumbNailSize) throws Exception
    {
        // Read in original image to create thumbnail from
        File inFile = new File(srcFileName);
        BufferedImage bufferedImage = ImageIO.read(inFile);
        // Calculate scale so image fits in a square area of thumbNailSize - e.g. 160
        int imageWidth = bufferedImage.getWidth();
        int imageHeight = bufferedImage.getHeight();
        int componentWidth = thumbNailSize;
        int componentHeight = thumbNailSize;
        double scale = -1;
        if ( imageWidth == componentWidth && imageHeight == componentHeight){
            scale = 1;
        }
        else if ( imageWidth <= componentWidth && imageHeight <= componentHeight)
        {
            // set scale to 1 if we don't want to scale up - otherwise use code below...
            scale = 1;
            // double heightScale = ((double)componentWidth) / ((double)imageWidth);
            // double widthScale = ((double)componentHeight) / ((double)imageHeight);
            // if ( heightScale < widthScale ) scale = heightScale;
            // else scale = widthScale;
        }
        else if ( imageWidth > componentWidth && imageHeight <= componentHeight)
        {
            double heightScale = ((double)componentWidth) / ((double)imageWidth);
            scale = heightScale;
        }
        else if ( imageWidth <= componentWidth && imageHeight > componentHeight)
        {
            double widthScale = ((double)componentHeight) / ((double)imageHeight);
            scale = widthScale;
        }
        else
        {
            double heightScale = ((double)componentWidth) / ((double)imageWidth);
            int scaledHeight = (int)(((double)imageHeight) * heightScale);
            double widthScale = ((double)componentHeight) / ((double)imageHeight);
            int scaledWidth = (int)(((double)imageWidth) * widthScale);
            if ( scaledWidth <= componentWidth ) scale = widthScale;
            else scale = heightScale;
        }
        // Now create thumbnail
        AffineTransform affineTransform = AffineTransform.getScaleInstance(scale,scale);
        //int interpolationType: TYPE_NEAREST_NEIGHBOR, TYPE_BILINEAR.
        // RenderingHints hints: If no hints are specified (hints is null), the interpolation type
        //is TYPE_NEAREST_NEIGHBOR.
        //VALUE_RENDER_QUALITY
        AffineTransformOp affineTransformOp = new AffineTransformOp(affineTransform,null);
        // AffineTransformOp affineTransformOp = new AffineTransformOp(affineTransform,
        //    //new RenderingHints(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_RENDER_QUALITY)
        //    new RenderingHints(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON)
        //                                                );
       
        BufferedImage scaledBufferedImage = affineTransformOp.filter(bufferedImage,null);
        // Now do fix to get rid of silly spurious line
       
        int scaledWidth = scaledBufferedImage.getWidth();
        int scaledHeight = scaledBufferedImage.getHeight();
       
        int expectedWidth = (int)(imageWidth * scale);
        int expectedHeight = (int)(imageHeight * scale);
        if ( scaledWidth > expectedWidth || scaledHeight > expectedHeight )
        scaledBufferedImage = scaledBufferedImage.getSubimage(
        0,0,expectedWidth,expectedHeight);
        // Now write out scaled image to file
        ImageIO.write(scaledBufferedImage,"JPG",new File(destFileName));
    }

    public static void main(String[] args)
    {
        args = new String[]{"/users/tp/DSC02551.JPG", "/users/tp/affineThumbnail-190.jpg", "190"};
       
        if ( args.length < 3 )
        {
            System.err.println("Usage: imageTest srcFile DestFile size");
            System.exit(-1);
        }
        try
        {
            int size = 160;
            try
            {
                size = Integer.parseInt(args[2]);
            }
            catch (NumberFormatException numberFormatException) { }
            AffineThumbnail main1 = new AffineThumbnail(args[0],args[1],size);
        }
        catch (Exception exception)
        {
            System.out.println(exception);
            exception.printStackTrace();
        }
    }
}

Håber nogen kan bruge det :)