How to convert an Object into Byte Array

This is a simple program to convert a java object into byte array, This program comes handy when we try to deep clone an object which is my next blog.

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.Date;


/**
 * 
 * @author shailesh.chandra
 *
 */
public class ObjectUtil {

 public static void main(String[] args) throws Exception {

  Object object = new Date();

  byte[] byteArray = convertByteArray(object);

  Object readObject = readByteArray(byteArray);

  System.out.println(readObject);

 }

 /**
  * 
  * @param object
  * @return
  * @throws Exception
  */
 private static byte[] convertByteArray(Object object) throws Exception {
  byte[] byteArray;

  ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
  ObjectOutputStream objectOutputStream = new ObjectOutputStream(byteArrayOutputStream);
  objectOutputStream.writeObject(object);

  byteArray = byteArrayOutputStream.toByteArray();
  return byteArray;
 }

 /**
  * 
  * @param byteArray
  * @throws IOException
  * @throws Exception
  */
 private static Object readByteArray(byte[] byteArray) throws Exception {
  ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(byteArray);
  ObjectInputStream objectOutputStream = new ObjectInputStream(byteArrayInputStream);
  Object readObject = objectOutputStream.readObject();

  objectOutputStream.close();
  byteArrayInputStream.close();

  return readObject;
 }

}

Deep Clone a object in Java

Below is the simple program to deep clone a object in java

import java.io.ByteArrayInputStream;

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import java.io.ObjectInputStream;

import java.io.ObjectOutputStream;

import java.io.Serializable;

/**

 *

 * @author shailesh.chandra

 *

 */

public class DeepCloneExample implements Cloneable, Serializable {

/**

*

*/

private static final long serialVersionUID = 6514927441919765349L;

public static void main(String[] args) throws CloneNotSupportedException {

DeepCloneExample deepCloneExample = new DeepCloneExample();

System.out.println(deepCloneExample);

DeepCloneExample cloneObject = (DeepCloneExample) deepCloneExample.clone();

System.out.println(cloneObject);

}

@Override

protected Object clone() throws CloneNotSupportedException {

Object object = deepClone();

return object;

}

/**

*

* @return

* @throws CloneNotSupportedException

*/

protected Object deepClone() throws CloneNotSupportedException {

DeepCloneExample clone;

try {

clone = null;

ByteArrayOutputStream bytearrayoutputstream = new ByteArrayOutputStream(100);

ObjectOutputStream objectoutputstream = new ObjectOutputStream(bytearrayoutputstream);

objectoutputstream.writeObject(this);

byte abyte0[] = bytearrayoutputstream.toByteArray();

objectoutputstream.close();

ByteArrayInputStream bytearrayinputstream = new ByteArrayInputStream(abyte0);

ObjectInputStream objectinputstream = new ObjectInputStream(bytearrayinputstream);

clone = (DeepCloneExample) objectinputstream.readObject();

objectinputstream.close();

} catch (ClassNotFoundException e) {

e.printStackTrace();

throw new CloneNotSupportedException(e.getMessage());

} catch (IOException e) {

e.printStackTrace();

throw new CloneNotSupportedException(e.getMessage());

}

return clone;

}

}