diff --git a/Java/Regex.java b/Java/Regex.java
new file mode 100644
index 0000000..c9f7c05
--- /dev/null
+++ b/Java/Regex.java
@@ -0,0 +1,5 @@
+
+
+public static boolean isIp(String ip) {
+	return ip.matches("^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$");
+}