MathUtilities.java

@@ -1,240 +1,284 @@
 
-
 /**
-* Created by dan on 6/14/17.
-*/
+ * Created by dan on 6/14/17.
+ */
 public class MathUtilities {
 
-   /**
-    * @param baseValue  starting value
-    * @param difference value to add to starting value
-    * @return sum of `baseValue` and `difference`
-    */
-   public Integer add(int baseValue, int difference) {
-       return null;
-   }
-
-   /**
-    * @param baseValue  starting value
-    * @param difference value to add to starting value
-    * @return sum of `baseValue` and `difference`
-    */
-   public Long add(long baseValue, long difference) {
-       return null;
-   }
-
-   /**
-    * @param baseValue  starting value
-    * @param difference value to add to starting value
-    * @return sum of `baseValue` and `difference`
-    */
-   public Short add(short baseValue, short difference) {
-       return null;
-   }
-
-   /**
-    * @param baseValue  starting value
-    * @param difference value to add to starting value
-    * @return sum of `baseValue` and `difference`
-    */
-   public Byte add(byte baseValue, byte difference) {
-       return null;
-   }
-
-   /**
-    * @param baseValue  starting value
-    * @param difference value to add to starting value
-    * @return sum of `baseValue` and `difference`
-    */
-   public Float add(float baseValue, float difference) {
-       return null;
-   }
-
-   /**
-    * @param baseValue  starting value
-    * @param difference value to add to starting value
-    * @return sum of `baseValue` and `difference`
-    */
-   public Double add(double baseValue, double difference) {
-       return null;
-   }
-
-   /**
-    * @param baseValue  starting value
-    * @param difference value to subtract from starting value
-    * @return difference between `baseValue` and `difference`
-    */
-   public Integer subtract(int baseValue, int difference) {
-       return null;
-   }
-
-   /**
-    * @param baseValue  starting value
-    * @param difference value to subtract from starting value
-    * @return difference between `baseValue` and `difference`
-    */
-   public Long subtract(long baseValue, long difference) {
-       return null;
-   }
-
-   /**
-    * @param baseValue  starting value
-    * @param difference value to subtract from starting value
-    * @return difference between `baseValue` and `difference`
-    */
-   public Short subtract(short baseValue, short difference) {
-       return null;
-   }
-
-   /**
-    * @param baseValue  starting value
-    * @param difference value to subtract from starting value
-    * @return difference between `baseValue` and `difference`
-    */
-   public Byte subtract(byte baseValue, byte difference) {
-       return null;
-   }
-
-   /**
-    * @param baseValue  starting value
-    * @param difference value to subtract from starting value
-    * @return difference between `baseValue` and `difference`
-    */
-   public Float subtract(float baseValue, float difference) {
-       return null;
-   }
-
-   /**
-    * @param baseValue  starting value
-    * @param difference value to subtract from starting value
-    * @return difference between `baseValue` and `difference`
-    */
-   public Double subtract(double baseValue, double difference) {
-       return null;
-   }
-
-
-   /**
-    * @param dividend value to be divided
-    * @param divisor value to divide by
-    * @return division of `dividend` by `divisor
-    */
-   public Integer divide(int dividend, int divisor) {
-       return null;
-   }
-
-   /**
-    * @param dividend value to be divided
-    * @param divisor value to divide by
-    * @return division of `dividend` by `divisor
-    */
-   public Long divide(long dividend, long divisor) {
-       return null;
-   }
-
-   /**
-    * @param dividend value to be divided
-    * @param divisor value to divide by
-    * @return division of `dividend` by `divisor
-    */
-   public Short divide(short dividend, short divisor) {
-       return null;
-   }
-
-   /**
-    * @param dividend value to be divided
-    * @param divisor value to divide by
-    * @return division of `dividend` by `divisor
-    */
-   public Byte divide(byte dividend, byte divisor) {
-       return null;
-   }
-
-   /**
-    * @param dividend value to be divided
-    * @param divisor value to divide by
-    * @return division of `dividend` by `divisor
-    */
-   public Float divide(float dividend, float divisor) {
-       return null;
-   }
-
-   /**
-    * @param dividend value to be divided
-    * @param divisor value to divide by
-    * @return division of `dividend` by `divisor
-    */
-   public Double divide(double dividend, double divisor) {
-       return null;
-   }
-
-
-   /**
-    * @param multiplicand value to be multiplied
-    * @param multiplier value to multiply by
-    * @return product of `multiplicand` by `multiplier`
-    */
-   public Integer multiply(int multiplicand, int multiplier) {
-       return null;
-   }
-
-   /**
-    * @param multiplicand value to be multiplied
-    * @param multiplier value to multiply by
-    * @return product of `multiplicand` by `multiplier`
-    */
-   public Long multiply(long multiplicand, long multiplier) {
-       return null;
-   }
-
-   /**
-    * @param multiplicand value to be multiplied
-    * @param multiplier value to multiply by
-    * @return product of `multiplicand` by `multiplier`
-    */
-   public Short multiply(short multiplicand, short multiplier) {
-       return null;
-   }
-   /**
-    * @param multiplicand value to be multiplied
-    * @param multiplier value to multiply by
-    * @return product of `multiplicand` by `multiplier`
-    */
-   public Byte multiply(byte multiplicand, byte multiplier) {
-       return null;
-   }
-
-   /**
-    * @param multiplicand value to be multiplied
-    * @param multiplier value to multiply by
-    * @return product of `multiplicand` by `multiplier`
-    */
-   public Float multiply(float multiplicand, float multiplier) {
-       return null;
-   }
-
-   /**
-    * @param multiplicand value to be multiplied
-    * @param multiplier value to multiply by
-    * @return product of `multiplicand` by `multiplier`
-    */
-   public Double multiply(double multiplicand, double multiplier) {
-       return null;
-   }
-
-
-   /**
+    /**
+     * @param baseValue  starting value
+     * @param difference value to add to starting value
+     * @return sum of `baseValue` and `difference`
+     */
+    public Integer add(int baseValue, int difference) {
+        return baseValue + difference;
+    }
+
+    /**
+     * @param baseValue  starting value
+     * @param difference value to add to starting value
+     * @return sum of `baseValue` and `difference`
+     */
+    public Long add(long baseValue, long difference) {
+        return baseValue + difference;
+    }
+
+    /**
+     * @param baseValue  starting value
+     * @param difference value to add to starting value
+     * @return sum of `baseValue` and `difference`
+     */
+    public Short add(short baseValue, short difference) {
+        
+        int x = (int) baseValue;
+        int y = (int) difference;
+        int z = x + y;
+        short o = (short) z;
+        
+        return o;
+        
+        // int x = baseValue;
+        // int y = difference;
+        // int z = x + y;
+        // short o = z;
+        
+    }
+    
+    /**
+     * @param baseValue  starting value
+     * @param difference value to add to starting value
+     * @return sum of `baseValue` and `difference`
+     */
+    public Byte add(byte baseValue, byte difference) {
+        int x = (int) baseValue;
+        int y = (int) difference;
+        int z = x + y;
+        byte o = (byte) z;
+        
+        return o;
+    }
+
+    /**
+     * @param baseValue  starting value
+     * @param difference value to add to starting value
+     * @return sum of `baseValue` and `difference`
+     */
+    public Float add(float baseValue, float difference) {
+        return baseValue + difference;
+    }
+
+    /**
+     * @param baseValue  starting value
+     * @param difference value to add to starting value
+     * @return sum of `baseValue` and `difference`
+     */
+    public Double add(double baseValue, double difference) {
+        return baseValue + difference;
+    }
+
+    /**
+     * @param baseValue  starting value
+     * @param difference value to subtract from starting value
+     * @return difference between `baseValue` and `difference`
+     */
+    public Integer subtract(int baseValue, int difference) {
+        return baseValue - difference;
+    }
+
+    /**
+     * @param baseValue  starting value
+     * @param difference value to subtract from starting value
+     * @return difference between `baseValue` and `difference`
+     */
+    public Long subtract(long baseValue, long difference) {
+        return baseValue - difference;
+    }
+
+    /**
+     * @param baseValue  starting value
+     * @param difference value to subtract from starting value
+     * @return difference between `baseValue` and `difference`
+     */
+    public Short subtract(short baseValue, short difference) {
+        int x = (int) baseValue;
+        int y = (int) difference;
+        int z = x - y;
+        short o = (short) z;
+        
+        return o;
+    }
+
+    /**
+     * @param baseValue  starting value
+     * @param difference value to subtract from starting value
+     * @return difference between `baseValue` and `difference`
+     */
+    public Byte subtract(byte baseValue, byte difference) {
+        int x = (int) baseValue;
+        int y = (int) difference;
+        int z = x - y;
+        byte o = (byte) z;
+        
+        return o;
+    }
+
+    /**
+     * @param baseValue  starting value
+     * @param difference value to subtract from starting value
+     * @return difference between `baseValue` and `difference`
+     */
+    public Float subtract(float baseValue, float difference) {
+        return baseValue - difference;
+    }
+
+    /**
+     * @param baseValue  starting value
+     * @param difference value to subtract from starting value
+     * @return difference between `baseValue` and `difference`
+     */
+    public Double subtract(double baseValue, double difference) {
+        return baseValue - difference;
+    }
+
+    /**
+     * @param dividend value to be divided
+     * @param divisor value to divide by
+     * @return division of `dividend` by `divisor
+     */
+    public Integer divide(int dividend, int divisor) {
+        return (dividend / divisor);
+    }
+
+    /**
+     * @param dividend value to be divided
+     * @param divisor value to divide by
+     * @return division of `dividend` by `divisor
+     */
+    public Long divide(long dividend, long divisor) {
+        return (dividend / divisor);
+    }
+
+    /**
+     * @param dividend value to be divided
+     * @param divisor value to divide by
+     * @return division of `dividend` by `divisor
+     */
+    public Short divide(short dividend, short divisor) {
+        int x = (int) dividend;
+        int y = (int) divisor;
+        int z = x / y;
+        short o = (short) z;
+        
+        return o;
+    }
+
+    /**
+     * @param dividend value to be divided
+     * @param divisor value to divide by
+     * @return division of `dividend` by `divisor
+     */
+    public Byte divide(byte dividend, byte divisor) {
+        int x = (int) dividend;
+        int y = (int) divisor;
+        int z = x / y;
+        byte o = (byte) z;
+        
+        return o;
+    }
+
+    /**
+     * @param dividend value to be divided
+     * @param divisor value to divide by
+     * @return division of `dividend` by `divisor
+     */
+    public Float divide(float dividend, float divisor) {
+        return (dividend / divisor);
+    }
+
+    /**
+     * @param dividend value to be divided
+     * @param divisor value to divide by
+     * @return division of `dividend` by `divisor
+     */
+    public Double divide(double dividend, double divisor) {
+        return (dividend / divisor);
+    }
+
+    /**
+     * @param multiplicand value to be multiplied
+     * @param multiplier value to multiply by
+     * @return product of `multiplicand` by `multiplier`
+     */
+    public Integer multiply(int multiplicand, int multiplier) {
+        return (multiplicand * multiplier);
+    }
+
+    /**
+     * @param multiplicand value to be multiplied
+     * @param multiplier value to multiply by
+     * @return product of `multiplicand` by `multiplier`
+     */
+    public Long multiply(long multiplicand, long multiplier) {
+        return (multiplicand * multiplier);
+    }
+
+    /**
+     * @param multiplicand value to be multiplied
+     * @param multiplier value to multiply by
+     * @return product of `multiplicand` by `multiplier`
+     */
+    public Short multiply(short multiplicand, short multiplier) {
+        int x = (int) multiplicand;
+        int y = (int) multiplier;
+        int z = x * y;
+        short o = (short) z;
+        
+        return o;
+    }
+
+    /**
+     * @param multiplicand value to be multiplied
+     * @param multiplier value to multiply by
+     * @return product of `multiplicand` by `multiplier`
+     */
+    public Byte multiply(byte multiplicand, byte multiplier) {
+        int x = (int) multiplicand;
+        int y = (int) multiplier;
+        int z = x * y;
+        byte o = (byte) z;
+        
+        return o;
+    }
+
+    /**
+     * @param multiplicand value to be multiplied
+     * @param multiplier value to multiply by
+     * @return product of `multiplicand` by `multiplier`
+     */
+    public Float multiply(float multiplicand, float multiplier) {
+        return (multiplicand * multiplier);
+    }
+
+    /**
+     * @param multiplicand value to be multiplied
+     * @param multiplier value to multiply by
+     * @return product of `multiplicand` by `multiplier`
+     */
+    public Double multiply(double multiplicand, double multiplier) {
+        return (multiplicand * multiplier);
+    }
+
+    /**
      * @return true
-    */
-   public Boolean returnTrue() {
-       return null;
-   }
-
-   /**
-    * @return false
-    */
-   public Boolean returnFalse() {
-       return null;
-   }
+     */
+    public Boolean returnTrue() {
+        return true;
+    }
+
+    /**
+     * @return false
+     */
+    public Boolean returnFalse() {
+        return false;
+    }
 
 }

PredicateUtilities.java

@@ -10,7 +10,7 @@ public class PredicateUtilities {
     * @return true if `x` is greater than `y`
     */
    public Boolean isGreaterThan(int x, int y) {
-       return null;
+       return (x > y);
    }
 
    /**
@@ -19,7 +19,7 @@ public class PredicateUtilities {
     * @return true if `x` is less than `y`
     */
    public Boolean isLessThan(int x, int y) {
-       return null;
+       return (x < y);
    }
 
    /**
@@ -28,7 +28,7 @@ public class PredicateUtilities {
     * @return true if `x` is greater than or equal to `y`
     */
    public Boolean isGreaterThanOrEqualTo(int x, int y) {
-       return null;
+       return (x >= y);
    }
 
    /**
@@ -37,6 +37,6 @@ public class PredicateUtilities {
     * @return true if `x` is less than or equal to `y`
     */
    public Boolean isLessThanOrEqualTo(int x, int y) {
-       return null;
+       return (x <= y);
    }
 }

StringUtilities.java

@@ -8,7 +8,7 @@ public class StringUtilities {
      * @return `Hello World` as a string
      */
     public String getHelloWorld() {
-        return null;
+        return "Hello World";
     }
 
     /**
@@ -17,7 +17,7 @@ public class StringUtilities {
      * @return the concatenation of two strings, `firstSegment`, and `secondSegment`
      */
     public String concatenation(String firstSegment, String secondSegment){
-        return null;
+        return firstSegment + secondSegment;
     }
 
     /**
@@ -26,7 +26,7 @@ public class StringUtilities {
      * @return the concatenation of an integer, `firstSegment`, and a String, `secondSegment`
      */
     public String concatenation(int firstSegment, String secondSegment){
-        return null;
+        return firstSegment + secondSegment;
     }
 
     /**
@@ -34,7 +34,7 @@ public class StringUtilities {
      * @return the first 3 characters of `input`
      */
     public String getPrefix(String input){
-        return null;
+        return input.substring(0, 3);
     }
 
     /**
@@ -42,7 +42,7 @@ public class StringUtilities {
      * @return the last 3 characters of `input`
      */
     public String getSuffix(String input){
-        return null;
+        return input.substring(2);
     }
 
     /**
@@ -51,7 +51,7 @@ public class StringUtilities {
      * @return the equivalence of two strings, `inputValue` and `comparableValue`
      */
     public Boolean compareTwoStrings(String inputValue, String comparableValue){
-        return null;
+        return inputValue.equals(comparableValue);
     }
 
     /**
@@ -59,7 +59,7 @@ public class StringUtilities {
      * @return the middle character of `inputValue`
      */
     public Character getMiddleCharacter(String inputValue){
-        return null;
+        return inputValue.charAt(3);
     }
 
     /**
@@ -67,7 +67,7 @@ public class StringUtilities {
      * @return the first sequence of characters
      */
     public String getFirstWord(String spaceDelimitedString){
-        return null;
+        return spaceDelimitedString.split(" ")[0];
     }
 
     /**
@@ -75,7 +75,7 @@ public class StringUtilities {
      * @return the second word of a string delimited by spaces.
      */
     public String getSecondWord(String spaceDelimitedString){
-        return null;
+        return spaceDelimitedString.split(" ")[1];
     }
 
     /**
@@ -83,7 +83,9 @@ public class StringUtilities {
      * @return an identical string with characters in reverse order.
      */
     public String reverse(String stringToReverse){
-        return null;
+        StringBuilder sb = new StringBuilder(stringToReverse);
+        stringToReverse = sb.reverse().toString();
+        return stringToReverse;
     }
 
     /**
@@ -91,7 +93,7 @@ public class StringUtilities {
      * @return an identical string with spaces removed.
      */
     public String removeWhitespace(String input){
-        return null;
+        return input.replaceAll(" ", "");
     }
 
     /**
@@ -99,6 +101,6 @@ public class StringUtilities {
      * @return an identical string with spaces in the front and end removed.
      */
     public String trim(String input){
-        return null;
+        return input.trim();
     }
 }

package.bluej

@@ -13,13 +13,13 @@ editor.fx.0.width=0
 editor.fx.0.x=0
 editor.fx.0.y=0
 objectbench.height=145
-objectbench.width=776
+objectbench.width=461
 package.divider.horizontal=0.6
 package.divider.vertical=0.7195571955719557
 package.editor.height=383
 package.editor.width=674
-package.editor.x=29
-package.editor.y=132
+package.editor.x=219
+package.editor.y=88
 package.frame.height=600
 package.frame.width=800
 package.numDependencies=3