add a Decryption method to get the orginal number from this code

import java.util.Scanner;

public class Encryption { public static void main(String[] args){ Scanner input = new Scanner(System.in); int digit1; int digit2; int digit3; int digit4; int cheese;

System.out.print("Enter first digit integer: "); digit1 = input.nextInt();

System.out.print("Enter second digit integer: "); digit2 = input.nextInt(); System.out.print("Enter third digit integer: "); digit3 = input.nextInt(); System.out.print("Enter fourth digit integer: "); digit4 = input.nextInt(); digit1 = (digit1 + 7) % 10;

digit2 = (digit2 + 7) % 10;

digit3 = (digit3 + 7) % 10;

digit4 = (digit4 + 7) % 10;

System.out.println("The encrypted number is " + digit3 + digit4 + digit1 + digit2);

}

}