//比率を出す
	double resizeWidthRatio = (double)resizeWidth / (double)src.getWidth();
	double resizeHeightRatio = (double)resizeHeight / (double)src.getHeight();
 
	AffineTransform at = AffineTransform.getScaleInstance(resizeWidthRatio, resizeHeightRatio);
	AffineTransformOp atOp = new AffineTransformOp(at, AffineTransformOp.TYPE_BICUBIC);

private IndexColorModel createIndexColorModel(){
        // Create a 6x6x6 color cube
        int[] cmap = new int[256];
        int i=0;
        for (int r=0; r < 256; r += 51) {
            for (int g=0; g < 256; g += 51) {
                for (int b=0; b < 256; b += 51) {
                    cmap[i++] = (r<<16)|(g<<8)|b;
                }
            }
        }
        // And populate the rest of the cmap with gray values
        int grayIncr = 256/(256-i);
 
        // The gray ramp will be between 18 and 252
        int gray = grayIncr*3;
        for (; i < 256; i++) {
            cmap[i] = (gray<<16)|(gray<<8)|gray;
            gray += grayIncr;
        }
 
        return new IndexColorModel(8, 256, cmap, 0, true, 215,
                                         DataBuffer.TYPE_BYTE);
	}

	BufferedImage b = new  BufferedImage(width, height, BufferedImage.TYPE_BYTE_INDEXED, createIndexColorModel());
	Graphics2D g = b.createGraphics();
	Map renderingHints = new HashMap();
	//描画のアンチエイリアス
//		renderingHints.put(RenderingHints.KEY_ANTIALIASING,
//				RenderingHints.VALUE_ANTIALIAS_ON);
	//文字描画のアンチエイリアス
	renderingHints.put(RenderingHints.KEY_TEXT_ANTIALIASING,
			RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
	//描画ヒントキー
	renderingHints.put(RenderingHints.KEY_RENDERING,
			RenderingHints.VALUE_RENDER_QUALITY);
	//アルファ補完
	renderingHints.put(RenderingHints.KEY_ALPHA_INTERPOLATION,
			RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY);
	g.setRenderingHints(renderingHints);
 
	g.setComposite(AlphaComposite.Clear);
	g.fillRect(0, 0, width, height);
	g.setComposite(AlphaComposite.SrcOver);
		:

private void writeImage(String outputFile, BufferedImage image) {
	File file = new File(outputFile);
	ImageOutputStream ios = null;
	ImageWriter iw = null;
	try {
		ios = ImageIO.createImageOutputStream(file);
		iw = ImageIO.getImageWritersByFormatName("gif").next();
 
		iw.setOutput(ios);
		iw.write(image);
 
	} catch (IOException e) {
		throw new Exception("ファイル作成に失敗しました");
	} finally {
		iw.dispose();
		try {
			ios.close();
		} catch (IOException e) {
			throw new Exception("ファイルのClose処理に失敗しました");
		}
	}
}

BufferedImage image = new BufferedImage(500, 500, BufferedImage.TYPE_INT_ARGB);
Graphics2d gdImage = image.createGraphics();
 
Point start = new Point(0, 0);
Point end = new Point(500, 500);
 
Line2D line = new Lind2D.Float(start, end);
 
gdImage.setPaint(Color.BLUE);
gdImage.setStroke(new BasicStroke());
gdImage.draw(line);

gdImage.setPaint(Color.BLUE);
gdImage.setStroke(new BasicStroke());
gdImage.draw(line);
 
gdImage.setPaint(Color.RED);
gdImage.setStroke(new BasicStroke(1, BasicStroke.JOIN_BEVEL, BasicStroke.CAP_BUTT));
gdImage.draw(line);