Quiz 1 finished

LoopFun.java

@@ -8,7 +8,11 @@ public class LoopFun
        * @return the factorial of the number
        */
       public int factorial(int number){
-          return -1;
+          int fact = 1;
+          for (int i = 1; i <= number; i++) {
+              fact = fact*i;
+            }
+          return fact;
       }
 
       /**
@@ -19,7 +23,13 @@ public class LoopFun
        * @return Upper case string of the first letter of each word
        */
       public String acronym(String phrase) {
-          return null;
+          
+          StringBuilder sb = new StringBuilder();
+          for (String s : phrase.split(" ")){
+              s = s.toUpperCase();
+              sb.append(s.charAt(0));
+            }
+            return sb.toString();
       }
 
       /**
@@ -35,6 +45,18 @@ public class LoopFun
        * @return the encrypted string by shifting each character by three character
        */
       public String encrypt(String word) {
-          return null;
+          int shift = 3;
+          String s = "";
+          int len = word.length();
+          for (int x = 0; x < len; x++){
+              char c = (char)(word.charAt(x) + shift);
+              if (c > 'z')
+                    s += (char)(word.charAt(x) - (26-shift));
+              else
+                    s += (char)(word.charAt(x) + shift);
+                            
+            }
+              
+          return s;
       }
 }

MathUtilities.java

@@ -6,7 +6,7 @@ public class MathUtilities{
    * @return the sum of the two numbers
    */
   public int add(int num1, int num2){
-      return -1;
+      return num1 + num2;
   }
 
   /**
@@ -16,7 +16,7 @@ public class MathUtilities{
    * @return the sum of the two numbers
    */
   public double add(double num1, double num2){
-      return -1;
+      return num1 + num2;
   }
 
   /**
@@ -25,7 +25,7 @@ public class MathUtilities{
    * @return the half of the number in double
    */
   public double half(int number) {
-      return -1;
+      return (double) (number)/2;
   }
 
   /**
@@ -34,8 +34,13 @@ public class MathUtilities{
    * @return true if the number is odd, false if it is even
    */
   public boolean isOdd(int number){
+      
+      if (number % 2 == 0){
       return false;
-  }
+  } else 
+      return true;
+      
+    }
 
 
   /**
@@ -44,7 +49,7 @@ public class MathUtilities{
    * @return the result of the number multiply by itself
    */
   public int square(int number) {
-      return -1;
+      return number * number;
   }
 
 }

StringUtilities.java

@@ -1,13 +1,20 @@
 public class StringUtilities {
    public Character getMiddleCharacter(String word){
-       return null;
+       return word.charAt((word.length()) / 2);
    }
    
    public String removeCharacter(String value, char charToRemove){
-     return null;  
+
+       String r = "";
+       for (int i = 0; i < value.length(); i++) {
+           if (value.charAt(i) != charToRemove) r += value.charAt(i);
+        }
+        return r;
+       
    }
    
    public String getLastWord(String value) {
-       return null;
+       String lastWord = value.substring(value.lastIndexOf(" ")+1);
+       return lastWord;
    }
 }

package.bluej

@@ -2,24 +2,24 @@
 dependency1.from=StringUtilitiesTest
 dependency1.to=StringUtilities
 dependency1.type=UsesDependency
-dependency2.from=BonusTest
-dependency2.to=Bonus
+dependency2.from=LoopFunTest
+dependency2.to=LoopFun
 dependency2.type=UsesDependency
 dependency3.from=MathUtilitiesTest
 dependency3.to=MathUtilities
 dependency3.type=UsesDependency
 editor.fx.0.height=722
 editor.fx.0.width=876
-editor.fx.0.x=158
-editor.fx.0.y=216
+editor.fx.0.x=769
+editor.fx.0.y=-858
 objectbench.height=164
 objectbench.width=669
 package.divider.horizontal=0.6
 package.divider.vertical=0.7628294036061026
 package.editor.height=543
 package.editor.width=567
-package.editor.x=557
-package.editor.y=43
+package.editor.x=38
+package.editor.y=-968
 package.frame.height=779
 package.frame.width=693
 package.numDependencies=3
@@ -40,20 +40,19 @@ target1.width=110
 target1.x=110
 target1.y=150
 target2.height=50
-target2.name=BonusTest
+target2.name=LoopFunTest
 target2.showInterface=false
 target2.type=UnitTestTargetJunit4
-target2.width=80
-target2.x=120
-target2.y=270
-target3.association=BonusTest
+target2.width=110
+target2.x=10
+target2.y=290
 target3.height=50
-target3.name=Bonus
+target3.name=LoopFun
 target3.showInterface=false
 target3.type=ClassTarget
 target3.width=80
-target3.x=90
-target3.y=300
+target3.x=200
+target3.y=210
 target4.association=MathUtilitiesTest
 target4.height=50
 target4.name=MathUtilities