Curtis Cook's Java String Cheese Lab

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;
+        return s.charAt(0);
     }
 
     /**
      * @return String
      */
     public static Character getNthCharacter(String s, Integer n) {
-        return null;
+        return s.charAt(n);
     }
 
     /**
      * @return String
      */
     public static String upperCaseFirstCharacter(String s) {
-        return null;
+        String capitalFirstLetter = s.substring(0,1).toUpperCase() + s.substring(1);
+        return capitalFirstLetter;
     }
 
     /**
      * @return String
      */
     public static String camelCaseString(String s) {
-        return null;
+        String lowercaseS = s.toLowerCase();
+        String firstWord = " ";
+        for(int i = 0; i < lowercaseS.length(); i++) {
+            if(Character.isWhitespace(lowercaseS.charAt(i))) {
+                firstWord = lowercaseS.substring(0, i);
+                break;
+            }
+        }
+       
+        firstWord = firstWord.substring(0, 1).toUpperCase() + firstWord.substring(1);
+        String secondWord = lowercaseS.substring(firstWord.length() + 1);
+        secondWord = secondWord.substring(0, 1).toUpperCase() + secondWord.substring(1);
+        String camelCaseWord = firstWord + secondWord;
+        
+        return camelCaseWord;
     }
 
     /**
      * @return String
      */
     public static String snakeCaseString(String s) {
-        return null;
+        String lowerCaseS = s.toLowerCase();
+        String firstWord = " ";
+        for(int i = 0; i < lowerCaseS.length(); i++) {
+            if(Character.isWhitespace(lowerCaseS.charAt(i))) {
+                firstWord = lowerCaseS.substring(0, i);
+                break;
+            }
+        }
+        
+        String snakeCaseWord = firstWord + "_"+ lowerCaseS.substring(firstWord.length() + 1);
+        return snakeCaseWord;
     }
 
     /**
      * @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;
+        return s1.equals(s2);
     }
 
     /**
      * @return String
      */
     public static Boolean isEqualIgnoreCase(String s1, String s2) {
-        return null;
+        return s1.equalsIgnoreCase(s2);
     }
 }

package.bluej

 dependency1.from=StringParserTest
 dependency1.to=StringParser
 dependency1.type=UsesDependency
-editor.fx.0.height=722
-editor.fx.0.width=800
-editor.fx.0.x=455
-editor.fx.0.y=51
+editor.fx.0.height=0
+editor.fx.0.width=0
+editor.fx.0.x=0
+editor.fx.0.y=0
 objectbench.height=164
 objectbench.width=776
 package.divider.horizontal=0.6