1 files changed, 26 insertions, 0 deletions
diff --git a/jsr305/sampleUses/src/main/java/LuhnVerification.java b/jsr305/sampleUses/src/main/java/LuhnVerification.java
new file mode 100644
index 00000000..f9ad2414
--- /dev/null
+++ b/jsr305/sampleUses/src/main/java/LuhnVerification.java
@@ -0,0 +1,26 @@
+public class LuhnVerification {
+
+	static boolean checkNumber(String value) {
+		int result = 0;
+		boolean special = false;
+		for (int i = value.length() - 1; i >= 0; i--) {
+			int v = value.charAt(i) - '0';
+			if (v < 0 || v > 9)
+				return false;
+			if (special) {
+				v = v * 2;
+				if (v > 9)
+					v = v - 10 + 1;
+			}
+			result += v;
+			special = !special;
+		}
+		System.out.println(result);
+		return result % 10 == 0;
+	}
+
+	public static void main(String args[]) {
+		System.out.println(checkNumber(""));
+	}
+
+}