finished lab

MathUtilities.java

@@ -1,3 +1,5 @@
+package DanDoBetterDrills;
+
  
 
 /**
@@ -11,7 +13,8 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Integer add(int baseValue, int difference) {
-        return null;
+        int easyOne = baseValue + difference;
+        return easyOne;
     }
 
     /**
@@ -20,7 +23,8 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Long add(long baseValue, long difference) {
-        return null;
+        long easyOne = baseValue + difference;
+        return easyOne;
     }
 
     /**
@@ -29,7 +33,8 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Short add(short baseValue, short difference) {
-        return null;
+        short easyOne = (short)(baseValue + difference);
+        return easyOne;
     }
 
     /**
@@ -38,7 +43,8 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Byte add(byte baseValue, byte difference) {
-        return null;
+        byte easyOne = (byte)(baseValue + difference);
+        return easyOne;
     }
 
     /**
@@ -47,7 +53,7 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Float add(float baseValue, float difference) {
-        return null;
+        return baseValue + difference;
     }
 
     /**
@@ -56,7 +62,7 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Double add(double baseValue, double difference) {
-        return null;
+        return baseValue + difference;
     }
 
     /**
@@ -65,7 +71,7 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Integer subtract(int baseValue, int difference) {
-        return null;
+        return baseValue - difference;
     }
 
     /**
@@ -74,7 +80,7 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Long subtract(long baseValue, long difference) {
-        return null;
+        return baseValue - difference;
     }
 
     /**
@@ -83,7 +89,8 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Short subtract(short baseValue, short difference) {
-        return null;
+         
+        return (short)(baseValue - difference);
     }
 
     /**
@@ -92,7 +99,7 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Byte subtract(byte baseValue, byte difference) {
-        return null;
+        return (byte)(baseValue - difference);
     }
 
     /**
@@ -101,7 +108,7 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Float subtract(float baseValue, float difference) {
-        return null;
+        return (float)(baseValue - difference);
     }
 
     /**
@@ -110,7 +117,7 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Double subtract(double baseValue, double difference) {
-        return null;
+        return (double)(baseValue - difference);
     }
 
 
@@ -120,7 +127,7 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Integer divide(int dividend, int divisor) {
-        return null;
+        return dividend/divisor;
     }
 
     /**
@@ -129,7 +136,7 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Long divide(long dividend, long divisor) {
-        return null;
+        return dividend/divisor;
     }
 
     /**
@@ -138,7 +145,7 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Short divide(short dividend, short divisor) {
-        return null;
+        return (short)(dividend/divisor);
     }
 
     /**
@@ -147,7 +154,7 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Byte divide(byte dividend, byte divisor) {
-        return null;
+        return (byte)(dividend/divisor);
     }
 
     /**
@@ -156,7 +163,7 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Float divide(float dividend, float divisor) {
-        return null;
+        return dividend/divisor;
     }
 
     /**
@@ -165,7 +172,7 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Double divide(double dividend, double divisor) {
-        return null;
+        return (double)(dividend/divisor);
     }
 
 
@@ -175,7 +182,7 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Integer multiply(int multiplicand, int multiplier) {
-        return null;
+        return multiplicand*multiplier;
     }
 
     /**
@@ -184,7 +191,7 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Long multiply(long multiplicand, long multiplier) {
-        return null;
+        return multiplicand*multiplier;
     }
 
     /**
@@ -193,7 +200,7 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Short multiply(short multiplicand, short multiplier) {
-        return null;
+        return (short)(multiplicand*multiplier);
     }
     /**
      * @param multiplicand value to be multiplied
@@ -201,7 +208,7 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Byte multiply(byte multiplicand, byte multiplier) {
-        return null;
+        return (byte)(multiplicand*multiplier);
     }
 
     /**
@@ -210,7 +217,7 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Float multiply(float multiplicand, float multiplier) {
-        return null;
+        return (float)(multiplicand*multiplier);
     }
 
     /**
@@ -219,7 +226,7 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Double multiply(double multiplicand, double multiplier) {
-        return null;
+        return (double)(multiplicand*multiplier);
     }
 
 
@@ -227,14 +234,14 @@ public class MathUtilities {
       * @return true
      */
     public Boolean returnTrue() {
-        return null;
+        return true;
     }
 
     /**
      * @return false
      */
     public Boolean returnFalse() {
-        return null;
+        return false;
     }
 
 }

MathUtilitiesTest.java

@@ -1,3 +1,5 @@
+package DanDoBetterDrills;
+
  
 
 import org.junit.Test;

PredicateUtilities.java

@@ -1,5 +1,9 @@
+package DanDoBetterDrills;
+
  
 
+
+
 /**
  * Created by dan on 6/14/17.
  */
@@ -10,7 +14,7 @@ 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 +23,7 @@ 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 +32,7 @@ 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 +41,6 @@ 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;
     }
-}
+}

PredicateUtilitiesTest.java

@@ -1,3 +1,5 @@
+package DanDoBetterDrills;
+
  
 
 import org.junit.Test;
@@ -24,7 +26,6 @@ public class PredicateUtilitiesTest {
         assertTrue(outcome);
     }
 
-
     @Test
     public void testGreaterThanFalse() {
         // : Given

StringUtilities.java

@@ -8,7 +8,7 @@ public class StringUtilities {
      * @return `Hello World` as a string
      */
     public static String getHelloWorld() {
-        return null;
+        return "Hello World";
     }
 
     /**
@@ -17,7 +17,7 @@ public class StringUtilities {
      * @return the concatenation of two strings, `firstSegment`, and `secondSegment`
      */
     public static String concatenation(String firstSegment, String secondSegment){
-        return null;
+        return firstSegment + secondSegment;
     }
 
     /**
@@ -26,7 +26,8 @@ public class StringUtilities {
      * @return the concatenation of an integer, `firstSegment`, and a String, `secondSegment`
      */
     public static String concatenation(int firstSegment, String secondSegment){
-        return null;
+        String newSegment = Integer.toString(firstSegment);
+        return newSegment + secondSegment;
     }
 
     /**
@@ -34,7 +35,7 @@ public class StringUtilities {
      * @return the first 3 characters of `input`
      */
     public static String getPrefix(String input){
-        return null;
+        return input.substring(0,3);
     }
 
     /**
@@ -42,7 +43,7 @@ public class StringUtilities {
      * @return the last 3 characters of `input`
      */
     public static String getSuffix(String input){
-        return null;
+        return input.substring(input.length() - 3);
     }
 
     /**
@@ -51,7 +52,7 @@ public class StringUtilities {
      * @return the equivalence of two strings, `inputValue` and `comparableValue`
      */
     public static Boolean compareTwoStrings(String inputValue, String comparableValue){
-        return null;
+        return inputValue.equals(comparableValue);
     }
 
     /**
@@ -59,7 +60,11 @@ public class StringUtilities {
      * @return the middle character of `inputValue`
      */
     public static Character getMiddleCharacter(String inputValue){
-        return null;
+        char newValue;
+        if (inputValue.length() % 2 == 0){
+        newValue = inputValue.charAt(inputValue.length()/2-1);}
+        else { newValue = inputValue.charAt(inputValue.length()/2);}
+        return newValue;
     }
 
     /**
@@ -67,7 +72,9 @@ public class StringUtilities {
      * @return the first sequence of characters
      */
     public static String getFirstWord(String spaceDelimitedString){
-        return null;
+        int i = spaceDelimitedString.indexOf(' ');
+        String word = spaceDelimitedString.substring(0, i);
+        return word;
     }
 
     /**
@@ -75,7 +82,9 @@ public class StringUtilities {
      * @return the second word of a string delimited by spaces.
      */
     public static String getSecondWord(String spaceDelimitedString){
-        return null;
+        int i = spaceDelimitedString.indexOf(' ');
+        String word = spaceDelimitedString.substring(i + 1, spaceDelimitedString.length());
+        return word;
     }
 
     /**
@@ -83,6 +92,7 @@ public class StringUtilities {
      * @return an identical string with characters in reverse order.
      */
     public static String reverse(String stringToReverse){
-        return null;
+        return new StringBuilder(stringToReverse).reverse().toString();
+        
     }
 }

package.bluej

@@ -1,23 +1,24 @@
 #BlueJ package file
-editor.fx.0.height=0
-editor.fx.0.width=0
-editor.fx.0.x=0
-editor.fx.0.y=0
+dependency1.from=MathUtilitiesTest
+dependency1.to=MathUtilities
+dependency1.type=UsesDependency
+dependency2.from=PredicateUtilitiesTest
+dependency2.to=PredicateUtilities
+dependency2.type=UsesDependency
 objectbench.height=129
-objectbench.width=1171
+objectbench.width=698
 package.divider.horizontal=0.6
 package.divider.vertical=0.7490774907749077
 package.editor.height=399
 package.editor.width=1069
-package.editor.x=59
-package.editor.y=63
+package.editor.x=120
+package.editor.y=60
 package.frame.height=600
 package.frame.width=1195
-package.numDependencies=0
+package.numDependencies=2
 package.numTargets=6
 package.showExtends=true
 package.showUses=true
-project.charset=UTF-8
 readme.height=58
 readme.name=@README
 readme.width=47