Convert Time to Any TimeZone

For converting one timezone to another, I have used the following code -

 
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;

public class TimeZoneMain {
 public static void main(String args[]) throws ParseException {
     
  DateFormat formatter = new SimpleDateFormat("dd MMM yyyy HH:mm:ss z");   
  Date date = new Date();
  String dateString = "14 Jul 2014 00:11:04 CEST";
  date = formatter.parse(dateString);
  System.out.println(formatter.format(date));
  
  // Set the formatter to use a different timezone  - Indian Standard Time
  formatter.setTimeZone(TimeZone.getTimeZone("IST"));  
  System.out.println("IST time : "+formatter.format(date));
  
  
  // Set the formatter to use a different timezone - Indochina Time
  formatter.setTimeZone(TimeZone.getTimeZone("Asia/Bangkok"));
  System.out.println("ICT time : "+formatter.format(date));
 }
}

But, if you don't want to use String as input date, you can create object of Calender Class, assign value in it & then use it.

Happy Learning!And, don't forget to share!

Compressing Image Using Java

Image compressing is an utility we use almost everyday... being it transferring image to to our near and dear ones, to, uploading image in database , or display it in a website. But, I didn't know that image compressing could be such an easy code until I found this one.

package com.src.compressor;

import java.awt.RenderingHints;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;

import javax.media.jai.JAI;
import javax.media.jai.OpImage;
import javax.media.jai.RenderedOp;

import com.sun.media.jai.codec.SeekableStream;

/**
 * 
 * @author Srijani Ghosh
 * @since Jul 1, 2014
 * 
 */
public class CompressImage {

 /**
  * @param args
  */
 public static void main(String[] args) {
  try {
   new CompressImage().compress();
  } catch (FileNotFoundException e) {
   e.printStackTrace();
  }
 }

 private void compress() throws FileNotFoundException {
  //input file
  File infile = new File(
    "D:\\WORKSPACE\\ImageCompressor\\image_source\\Jellyfish.jpg");
  
  // destination path for compressed file
  File outfile = new File(
    "D:\\WORKSPACE\\ImageCompressor\\image_compressed\\Jellyfish.jpg");

  BufferedInputStream bis = new BufferedInputStream(new FileInputStream(
    infile));
  BufferedOutputStream bos = new BufferedOutputStream(
    new FileOutputStream(outfile));

  SeekableStream s = SeekableStream.wrapInputStream(bis, true);

  RenderedOp image = JAI.create("stream", s);
  ((OpImage) image.getRendering()).setTileCache(null);

  RenderingHints qualityHints = new RenderingHints(
    RenderingHints.KEY_RENDERING,
    RenderingHints.VALUE_RENDER_QUALITY);

  RenderedOp resizedImage = JAI.create("SubsampleAverage", image, 0.9,
    0.9, qualityHints);

  JAI.create("encode", resizedImage, bos, "JPEG", null);
  
  /*Print the size before and after compression*/
  System.out.println("File size before compression : "+ infile.length()+" Bytes");
  System.out.println("File size after compression : "+ outfile.length()+" Bytes");

 }

}

Please remember to use these jars - sun-jai_codec.jar, sun-jai_core.jar (i.e. add them in the classpath of your project) while running this code.
The output for me was :

File size before compression : 775702 Bytes
File size after compression : 48668 Bytes

Happy Learning!
Don't forget to share!