Added 25 solutions

Java/Strings/Java Regex/Solution.java

@@ -2,6 +2,20 @@
 //     Github: github.com/rshaghoulian
 // HackerRank: hackerrank.com/rshaghoulian
 
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import java.util.Scanner;
+
+class Solution {
+    public static void main(String []args) {
+        Scanner in = new Scanner(System.in);
+        while(in.hasNext()) {
+            String IP = in.next();
+            System.out.println(IP.matches(new MyRegex().pattern));
+        }
+    }
+}
+
 /*
      [01]?\\d{1,2}   matches numbers 0-199.
      2[0-4]\\d       matches numbers 200-249
@@ -10,4 +24,4 @@
 class MyRegex {
     String num = "([01]?\\d{1,2}|2[0-4]\\d|25[0-5])";
     String pattern = num + "." +  num + "." +  num + "." + num;
-}
+}