diff --git a/tutorial/ValidateHKID.java b/tutorial/ValidateHKID.java
new file mode 100644
index 0000000..1ff200b
--- /dev/null
+++ b/tutorial/ValidateHKID.java
@@ -0,0 +1,36 @@
+package tutorial;
+
+import java.util.Scanner;
+
+public class ValidateHKID {
+	public static void main(String[] args) {
+
+	Scanner input = new Scanner(System.in);
+	System.out.println("Please enter your first 7 character of your HKID card number.");
+	String str = input.nextLine();
+
+	char[] strHKID;
+	int int_Sum;
+	int int_Code;
+	strHKID = str.toCharArray();
+	strHKID[0] = Character.toUpperCase(strHKID[0]);
+	int_Sum = ( (int)strHKID[0] -64 ) *8;
+	int_Sum = int_Sum + ( (int)strHKID[1] -48 ) *7;
+	int_Sum = int_Sum + ( (int)strHKID[2] -48 ) *6;
+	int_Sum = int_Sum + ( (int)strHKID[3] -48 ) *5;
+	int_Sum = int_Sum + ( (int)strHKID[4] -48 ) *4;
+	int_Sum = int_Sum + ( (int)strHKID[5] -48 ) *3;
+	int_Sum = int_Sum + ( (int)strHKID[6] -48 ) *2;
+	int_Code = 11 - ( int_Sum % 11);
+
+	System.out.print("The HKID is: " + strHKID[0] + str.substring(1,7));
+	if (int_Code == 11) {
+			System.out.println("(0)");
+	} else if(int_Code == 10) {
+		System.out.println("(A)");
+	} else {
+		System.out.println( "(" + int_Code + ")" );
+		}
+
+	}
+}
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