Encrypting file using AES encryption in JAVA

//RSA - Rivest, Shamir, & Adleman
 
import java.io.InputStream;
import java.io.OutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectOutputStream;
import java.io.ObjectInputStream;
 
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.CipherInputStream;
import javax.crypto.CipherOutputStream;
import javax.crypto.KeyGenerator;
 
import java.security.spec.AlgorithmParameterSpec;
 
public class AESEncrypter
{
	Cipher ecipher;
	Cipher dcipher;
	
	public AESEncrypter(SecretKey key)
	{
		// Create an 8-byte initialization vector
		byte[] iv = new byte[]
		{
			0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f
		};
		
		AlgorithmParameterSpec paramSpec = new IvParameterSpec(iv);
		try
		{
			ecipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
			dcipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
			
			// CBC requires an initialization vector
			ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec);
			dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec);
		}
		catch (Exception e)
		{
			e.printStackTrace();
		}
	}
	
	// Buffer used to transport the bytes from one stream to another
	byte[] buf = new byte[1024];
	
	public void encrypt(InputStream in, OutputStream out)
	{
		try
		{
			// Bytes written to out will be encrypted
			out = new CipherOutputStream(out, ecipher);
			
			// Read in the cleartext bytes and write to out to encrypt
			int numRead = 0;
			while ((numRead = in.read(buf)) >= 0)
			{
				out.write(buf, 0, numRead);
			}
			out.close();
		}
		catch (java.io.IOException e)
		{
		}
	}
	
	public void decrypt(InputStream in, OutputStream out)
	{
		try
		{
			// Bytes read from in will be decrypted
			in = new CipherInputStream(in, dcipher);
			
			// Read in the decrypted bytes and write the cleartext to out
			int numRead = 0;
			while ((numRead = in.read(buf)) >= 0)
			{
				out.write(buf, 0, numRead);
			}
			out.close();
		}
		catch (java.io.IOException e)
		{
		}
	}
	
	public static void main(String args[])
	{
		try
		{
			// Generate a temporary key. In practice, you would save this key.
			// See also e464 Encrypting with DES Using a Pass Phrase.
			
			KeyGenerator	kgen	=	KeyGenerator.getInstance("AES");
			kgen.init(128);
			SecretKey key			=	kgen.generateKey();
			
			// Create encrypter/decrypter class
			AESEncrypter encrypter = new AESEncrypter(key);
			
			// Encrypt
			encrypter.encrypt(new FileInputStream("DESTest.txt"),new FileOutputStream("Encrypted.txt"));
			// Decrypt
			encrypter.decrypt(new FileInputStream("Encrypted.txt"),new FileOutputStream("Decrypted.txt"));
		}
		catch (Exception e)
		{
			e.printStackTrace();
		}
	}
}