Caesar-Cipher-Text/caesiro.java at main · Bala320/Caesar-Cipher-Text · GitHub

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package AffineChiper;
import java.util.*;
public class caesiro
{
	int shift=0;

  public  String encrypt(String text)
  {    shift=8;
	  if(shift>26)
	  {
		  shift%=26;
	  }
	  else if(shift<0)
	  {
		  shift=(shift%26)+26;
	  }
	  String cipher=" ";
	 for(int i=0;i<text.length();i++)
	 {
		 char bal=text.charAt(i);
		 if(Character.isLetter(bal))
		 {
			 if(Character.isLowerCase(bal))
          {
			 char cae=(char)(bal+shift);
			 if(cae>'z')
			 {
				 cipher+=(char)(bal-(26-shift));
			 }
			 else
			 {
				 cipher=cipher+cae;
			 }
		 }
			 else if(Character.isUpperCase(bal))
			 {
				 char cae=(char)(bal+shift);
				 if(cae>'Z')
				 {
					 cipher+=(char)(bal-(26-shift));
				 }
				 else
				 {
					 cipher+=cae;
				 }
			 }
		 }
		 else
		 {
			 cipher=cipher+bal;
		 }
	 }
	 System.out.println(cipher);
	  return cipher;
  }
  public  String decrypt(String text)
  {   shift=8;
	  if(shift>26)
	  {
		  shift%=26;
	  }
	  else if(shift<0)
	  {
		  shift=(shift%26)+26;
	  }
	  String cipher=" ";
	 for(int i=0;i<text.length();i++)
	 {
		 char bal=text.charAt(i);
		 if(Character.isLetter(bal))
		 {
			 if(Character.isLowerCase(bal))
          {
			 char cae=(char)(bal-shift);
			 if(cae<'a')
			 {
				 cipher+=(char)(bal+(26-shift));
			 }
			 else
			 {
				 cipher=cipher+cae;
			 }
		 }
			 else if(Character.isUpperCase(bal))
			 {
				 char cae=(char)(bal-shift);
				 if(cae<'A')
				 {
					 cipher+=(char)(bal+(26-shift));
				 }
				 else
				 {
					 cipher+=cae;
				 }
			 }
		 }
		 else
		 {
			 cipher=cipher+bal;
		 }
	 }

	  return cipher;
  }

  public static void main(String arg[])
  {
	 /* Scanner sin=new Scanner(System.in);
	  System.out.println("Enter the plain text:\n");
	  String msg=sin.nextLine();
	  System.out.println("Enter the shif:\n");
	 // int key=sin.nextInt();
	  System.out.println("the encrypted Text:\n");
	  String cipher=encrypt(msg);
	  System.out.println(cipher);
	  System.out.println("the decrypted Text:\n");
	  String decode=decrypt(cipher);
	  System.out.println(decode);*/

	  String en=new caesiro().encrypt("hello 7299 nave 00%");
	  System.out.println(new caesiro().decrypt(en) );
	  ArrayList n=new ArrayList();

  }
}