import java.io.*;
import java.awt.*;
import java.awt.image.*;
import javax.imageio.*;
public class Java2DTest2
{
   public static void main(String args[])
       throws Exception
   {
       /* 画像をリサイズ */
       BufferedImage img = ImageIO.read(new File("sf.jpg"));
       BufferedImage img2 = new BufferedImage(
           110, 110, BufferedImage.TYPE_INT_BGR
       );
       Graphics2D gr = img2.createGraphics();
       gr.drawImage(img, 0, 0, img2.getWidth(), img2.getHeight(), null);
       gr.dispose();
       ImageIO.write(img2, "png", new File("sample482a.png"));
   }
}
元画像(sf.jpg)
出力画像(sample482a.png)

環境
JDK6 Upadate6(JDK1.6.0_06)
 
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