AES Encryption Decryption

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.security.Key;
import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.KeyGenerator;

public class AESEncryptionDecryption {
   
    public static void main(String[] args) {
      try{
          Cipher cipher = Cipher.getInstance("AES");
          KeyGenerator kg = KeyGenerator.getInstance("AES");
          Key key = kg.generateKey();

          cipher.init(Cipher.ENCRYPT_MODE, key);
          CipherInputStream cipt=new CipherInputStream(new FileInputStream(new File("D:\\PlainTextInput.txt")), cipher);
          FileOutputStream fip=new FileOutputStream(new File("D:\\EncryptedText.txt"));

          int i;
          while((i=cipt.read())!=-1)
          {
             fip.write(i);
          }

          cipher.init(Cipher.DECRYPT_MODE, key);
          CipherInputStream ciptt=new CipherInputStream(new FileInputStream(new File("D:\\EncryptedText.txt")), cipher);
          FileOutputStream fop=new FileOutputStream(new File("D:\\DecryptedText.txt"));

          int j;
          while((j=ciptt.read())!=-1)
          {
             fop.write(j);
          }

        }
        catch(Exception e) {
           e.printStackTrace();
        }
      System.out.println("Encryption and Decryption of plain text file performed successfully.");
    }
}

Output of the program:

Encryption and Decryption of plain text file performed successfully.

Content of PlainTextInput.txt file: HelloStudent

Content of EncryptedText.txt file: ùóà ¬x9f¯—©c aá

Content of DecryptedText.txt file: HelloStudent 

Note: You need to create PlainTextInput.txt file in D:\ drive of computer. Execution of program will create EncryptedText.txt and DecryptedText.txt file in D:\ drive.

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