StringParser.java

      */
     public static String upperCaseString(String s)
     {
-        return null;
+        return s.toUpperCase();
     }
 
     /**
      * @return String
      */
     public static String lowerCaseString(String s) {
-        return null;
+        return s.toLowerCase();
     }
 
     /**
      * @return String
      */
     public static Character getFirstCharacter(String s) {
-        return null;
+        String convert = s.substring(0,1);
+        char solution = convert.charAt(0);
+        return solution;
     }
 
     /**
      * @return String
      */
     public static Character getNthCharacter(String s, Integer n) {
-        return null;
+        int firstnum = n + 1;
+        String thechar = s.substring(n,firstnum);
+        char itsthechar = thechar.charAt(0);
+        return itsthechar;
     }
 
     /**
      * @return String
      */
     public static String upperCaseFirstCharacter(String s) {
-        return null;
+        int length = s.length();
+        String upperchar = s.substring(0,1).toUpperCase();
+        return upperchar + s.substring(1,length);
     }
 
     /**
      * @return String
      */
     public static String camelCaseString(String s) {
-        return null;
+    String[] splitem = s.split("\\s+");
+    String upperchar1 = splitem[0].substring(0,1).toUpperCase();
+    String upperchar2 = splitem[1].substring(0,1).toUpperCase();
+    String lowerchar1 = splitem[0].substring(1,splitem[0].length()).toLowerCase();
+    String lowerchar2 = splitem[1].substring(1,splitem[1].length()).toLowerCase();
+    return upperchar1 + lowerchar1 + upperchar2 + lowerchar2;
     }
 
     /**
      * @return String
      */
     public static String snakeCaseString(String s) {
-        return null;
+    String[] splitem = s.split("\\s+");
+    String first = splitem[0].toLowerCase();
+    String second = splitem[1].toLowerCase();
+    return first + "_" + second;
     }
 
     /**
      * @return String
      */
     public static Integer getLength(String s) {
-        return null;
+        return s.length();
     }
 
     /**
      * @return String
      */
     public static Boolean isEqual(String s1, String s2) {
-        return null;
+        if (s1 == s2) {return true;} else {return false;}
     }
 
     /**
      * @return String
      */
     public static Boolean isEqualIgnoreCase(String s1, String s2) {
-        return null;
+        return s1.equals(s2);
     }
 }