how to resize an image using java

resize jpeg image using java source code
resize bmp,jpg images using java program

/**
* @author JohnJustin
www.johnjustin.tk
*
*/

package ImageResizing;
import java.awt.Graphics2D;
import java.awt.RenderingHints;

import java.awt.AlphaComposite;
import java.awt.image.BufferedImage;
import java.awt.image.RenderedImage;
import java.awt.image.PixelGrabber;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.util.Vector;

import javax.imageio.ImageIO;

public class ImageResize{

/*public static BufferedImage theOriginalImage = null;
public static BufferedImage theNewImage = null;
public static int theOriginalImageWidth = 0,theOriginalImageHeight = 0;
public static int theNewImageWidth = 0, theNewImageHeight = 0;*/

public static boolean stretched = false;

public static void setStretched()
{
  stretched = true;  
}

public static boolean resizeImage(String source_file,String dest_file,int width,int height)
{
 boolean blnSuccess = false;
 File infile = null;
 File outfile = null;
 BufferedImage originalImage = null;
 BufferedImage theNewImage = null;
 int theOriginalImageWidth = 0, theOriginalImageHeight = 0;
 int theNewImageWidth = 0, theNewImageHeight = 0;

 try{
  infile = new File(source_file);
  outfile = new File(dest_file);
  originalImage = ImageIO.read(infile);
  theOriginalImageWidth = originalImage.getWidth();
  theOriginalImageHeight = originalImage.getHeight(); 
  System.out.println("Height >> " + theOriginalImageWidth + " Width >> " + theOriginalImageHeight);
  theNewImageWidth = width;
  //theNewImageHeight = height;
  if(theOriginalImageWidth < theNewImageWidth || theOriginalImageHeight < theNewImageHeight){
   setStretched();
  }
  theNewImageHeight = (theOriginalImageHeight*theNewImageWidth)/theOriginalImageWidth;
  System.out.println("The New Image Width >> " + theNewImageWidth + " The New Image Height >> " + theNewImageHeight);
  theNewImage = new BufferedImage(theNewImageWidth,theNewImageHeight,BufferedImage.TYPE_INT_RGB);
  Graphics2D loGraphics = theNewImage.createGraphics(); 
  loGraphics.setComposite(AlphaComposite.Src); 
  loGraphics.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING,RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
  loGraphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);
  loGraphics.setRenderingHint(RenderingHints.KEY_INTERPOLATION,RenderingHints.VALUE_INTERPOLATION_BILINEAR);
  loGraphics.drawImage(originalImage,0,0,theNewImageWidth,theNewImageHeight,null);
  loGraphics.dispose();
  ImageIO.write(theNewImage,"jpg",outfile);  
  blnSuccess = true;
 }catch(Exception e){
  System.out.println("Error While Executing resizeImage function >> " + e.getMessage());
  return(blnSuccess);
 }

 return(blnSuccess);
}

public static void main(String args[])
{
 ImageResize resize = new ImageResize();
 String source_file = "E:\\john\\img.jpg";
 String dest_file = "E:\\john\\imgresize.jpg";
 int width = 300;
 int height = 300;
 boolean flag = resize.resizeImage(source_file,dest_file,width,height);
 if(flag){
  System.out.println("Resized " + source_file + " to " + dest_file);
 }
 if(stretched){
  System.out.println("The Image Resized Will be in Stretched Format");
 }
}

}

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