changed code to pass all tests

StringParser.java

@@ -15,7 +15,8 @@ public class StringParser
      */
     public static String upperCaseString(String s)
     {
-        return null;
+        String str = "";
+        return s.toUpperCase();
     }
 
     /**
@@ -26,7 +27,7 @@ public class StringParser
      * @return String
      */
     public static String lowerCaseString(String s) {
-        return null;
+        return s.toLowerCase();
     }
 
     /**
@@ -37,7 +38,7 @@ public class StringParser
      * @return String
      */
     public static Character getFirstCharacter(String s) {
-        return null;
+        return s.charAt(0);
     }
 
     /**
@@ -49,7 +50,7 @@ public class StringParser
      * @return String
      */
     public static Character getNthCharacter(String s, Integer n) {
-        return null;
+        return s.charAt(n);
     }
 
     /**
@@ -60,7 +61,7 @@ public class StringParser
      * @return String
      */
     public static String upperCaseFirstCharacter(String s) {
-        return null;
+        return s.substring(0,1).toUpperCase()+s.substring(1);
     }
 
     /**
@@ -72,7 +73,8 @@ public class StringParser
      * @return String
      */
     public static String camelCaseString(String s) {
-        return null;
+        int x = s.indexOf(' ');
+        return s.substring(0,1).toUpperCase() + s.substring(1,x).toLowerCase() + s.substring(x+1,x+2).toUpperCase() + s.substring(x+2).toLowerCase();
     }
 
     /**
@@ -84,7 +86,8 @@ public class StringParser
      * @return String
      */
     public static String snakeCaseString(String s) {
-        return null;
+        int x = s.indexOf(' ');
+        return s.substring(0,x).toLowerCase() + "_" + s.substring(x+1).toLowerCase();
     }
 
     /**
@@ -95,7 +98,7 @@ public class StringParser
      * @return String
      */
     public static Integer getLength(String s) {
-        return null;
+        return s.length();
     }
 
     /**
@@ -109,7 +112,7 @@ public class StringParser
      * @return String
      */
     public static Boolean isEqual(String s1, String s2) {
-        return null;
+        return s1.equals(s2);
     }
 
     /**
@@ -123,6 +126,7 @@ public class StringParser
      * @return String
      */
     public static Boolean isEqualIgnoreCase(String s1, String s2) {
-        return null;
+        boolean fai = s1.equalsIgnoreCase(s2);
+        return fai;
     }
 }

package.bluej

@@ -2,10 +2,10 @@
 dependency1.from=StringParserTest
 dependency1.to=StringParser
 dependency1.type=UsesDependency
-editor.fx.0.height=722
+editor.fx.0.height=714
 editor.fx.0.width=800
 editor.fx.0.x=455
-editor.fx.0.y=51
+editor.fx.0.y=23
 objectbench.height=164
 objectbench.width=776
 package.divider.horizontal=0.6