q10.java

/*Implement Caesar Cipher */
// Id - 21CE002 Andrew
import java.util.*;
public class q10
{
	public static StringBuffer encrypt(String text, int s)
	{
		StringBuffer result= new StringBuffer();

		for (int i=0; i<text.length(); i++)
		{
			if (Character.isUpperCase(text.charAt(i)))
			{
				char ch = (char)(((int)text.charAt(i) +
								s - 65) % 26 + 65);
				result.append(ch);
			}
			else
			{
				char ch = (char)(((int)text.charAt(i) +
								s - 97) % 26 + 97);
				result.append(ch);
			}
		}
		return result;
	}
	public static void main(String[] args)
	{
        StringBuffer text= new StringBuffer();
        Scanner sc= new Scanner(System.in);
        System.out.println("Enter text to Encrypt :");
        text.append(sc.next());
        System.out.println("Enter shift :");
        int s = sc.nextInt();
        String str = text.toString();
		System.out.println("Text : " + text);
		System.out.println("Shift : " + s);
		System.out.println("Cipher: " + encrypt(str, s));
	}
}