Create Ayushee

Ayushee

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+//Ayushee Gupta
+
+import java.util.Scanner;
+
+public class CaesarCipher {
+    public static void main(String[] args) 
+    {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.println("----------Caesar Cipher-----------");
+        System.out.print("Enter the Message: ");
+        String msg = scanner.nextLine();
+        System.out.print("Enter the Position: ");
+        int position = scanner.nextInt();
+        String encryptedMsg = Encrypt(msg, position);
+        String decryptMsg= Decrypt(encryptedMsg, position);
+        System.out.println("Encrypted Message: " + encryptedMsg);
+        System.out.println("Decrypted Message: " + decryptMsg );
+    }
+
+    public static String Encrypt(String textToEncrypt, int positions)
+    {
+        String toEncrypt = "", 
+               result = "";
+
+        for(int i=0; i< textToEncrypt.length(); i++)
+        {
+
+            if(textToEncrypt.charAt(i) == ' ' || textToEncrypt.charAt(i) == '.')
+            {
+                continue;
+            }
+            else
+            {
+                if(Character.isLowerCase(textToEncrypt.charAt(i)))
+                {
+                    toEncrypt += Character.toUpperCase(textToEncrypt.charAt(i));
+                }
+                else
+                {
+                   toEncrypt += textToEncrypt.charAt(i);
+                }
+            }
+        }
+
+        for(int i=0; i<toEncrypt.length(); i++)
+        {
+            char shiftedLetter = (char) (toEncrypt.charAt(i)+positions);
+            if(shiftedLetter>'Z')
+            {
+                shiftedLetter = (char) (shiftedLetter - 'Z' + 'A' - 1);
+            }
+            result += shiftedLetter;
+        }
+        return result;
+    }
+
+    public static String Decrypt(String textToDecrypt, int positions)
+    {
+        String result = "";
+
+        for(int i=0; i< textToDecrypt.length(); i++)
+        {
+            char shiftedLetter = (char) (textToDecrypt.charAt(i)-positions);
+            if(shiftedLetter<'A')
+            {
+                shiftedLetter = (char) (shiftedLetter + 'Z' - 'A' + 1);
+            }
+            result += shiftedLetter;
+        }
+        return result;
+    }
+}