Added 25 solutions

Java/Strings/Java Regex 3 - Username Checker/Solution.java

@@ -12,15 +12,14 @@ public class Solution {
    public static void main(String[] args){
       Scanner in = new Scanner(System.in);
       int testCases = Integer.parseInt(in.nextLine());
-      while(testCases>0){
+      while (testCases > 0) {
          String username = in.nextLine();
-         //String pattern = Complete this line in the editable area below  
          String pattern = "^[a-zA-Z]\\w{7,29}$";
 
          Pattern r = Pattern.compile(pattern);
          Matcher m = r.matcher(username);
           
-         if (m.find( )) {
+         if (m.find()) {
             System.out.println("Valid");
          } else {
             System.out.println("Invalid");