Finished.

StringUtilities.java

@@ -1,4 +1,5 @@
 
+import java.lang.StringBuilder;
 
 /**
  * Created by dan on 6/14/17.
@@ -87,11 +88,11 @@ public class StringUtilities {
      */
     public String reverse(String stringToReverse){
         char[] chars = stringToReverse.toCharArray();
-        String newString = "";
+        StringBuilder str = new StringBuilder();
         for(int i = chars.length - 1; i >= 0 ; i--){
-            newString = newString + Character.toString(chars[i]);
+            str.append(Character.toString(chars[i]));
         }
-        return newString;
+        return str.toString();
     }
 
     /**

package.bluej

@@ -8,10 +8,10 @@ dependency2.type=UsesDependency
 dependency3.from=PredicateUtilitiesTest
 dependency3.to=PredicateUtilities
 dependency3.type=UsesDependency
-editor.fx.0.height=0
-editor.fx.0.width=0
-editor.fx.0.x=0
-editor.fx.0.y=0
+editor.fx.0.height=684
+editor.fx.0.width=800
+editor.fx.0.x=993
+editor.fx.0.y=186
 objectbench.height=145
 objectbench.width=776
 package.divider.horizontal=0.6
@@ -19,7 +19,7 @@ package.divider.vertical=0.7195571955719557
 package.editor.height=383
 package.editor.width=674
 package.editor.x=284
-package.editor.y=51
+package.editor.y=331
 package.frame.height=600
 package.frame.width=800
 package.numDependencies=3