String Functions

MathUtilities.ctxt

@@ -1,7 +1,7 @@
 #BlueJ class context
 comment0.target=MathUtilities
 comment0.text=\n\ Created\ by\ dan\ on\ 6/14/17.\n
-comment1.params=baseValue\ difference
+comment1.params=baseValue\ addedValue
 comment1.target=java.lang.Integer\ add(int,\ int)
 comment1.text=\n\ @param\ baseValue\ \ starting\ value\n\ @param\ difference\ value\ to\ add\ to\ starting\ value\n\ @return\ sum\ of\ `baseValue`\ and\ `difference`\n
 comment10.params=baseValue\ difference
@@ -58,16 +58,16 @@ comment25.text=\n\ @return\ true\n
 comment26.params=
 comment26.target=java.lang.Boolean\ returnFalse()
 comment26.text=\n\ @return\ false\n
-comment3.params=baseValue\ difference
+comment3.params=baseValue\ addedValue
 comment3.target=java.lang.Short\ add(short,\ short)
 comment3.text=\n\ @param\ baseValue\ \ starting\ value\n\ @param\ difference\ value\ to\ add\ to\ starting\ value\n\ @return\ sum\ of\ `baseValue`\ and\ `difference`\n
-comment4.params=baseValue\ difference
+comment4.params=baseValue\ addedValue
 comment4.target=java.lang.Byte\ add(byte,\ byte)
 comment4.text=\n\ @param\ baseValue\ \ starting\ value\n\ @param\ difference\ value\ to\ add\ to\ starting\ value\n\ @return\ sum\ of\ `baseValue`\ and\ `difference`\n
-comment5.params=baseValue\ difference
+comment5.params=baseValue\ addedValue
 comment5.target=java.lang.Float\ add(float,\ float)
 comment5.text=\n\ @param\ baseValue\ \ starting\ value\n\ @param\ difference\ value\ to\ add\ to\ starting\ value\n\ @return\ sum\ of\ `baseValue`\ and\ `difference`\n
-comment6.params=baseValue\ difference
+comment6.params=baseValue\ addedValue
 comment6.target=java.lang.Double\ add(double,\ double)
 comment6.text=\n\ @param\ baseValue\ \ starting\ value\n\ @param\ difference\ value\ to\ add\ to\ starting\ value\n\ @return\ sum\ of\ `baseValue`\ and\ `difference`\n
 comment7.params=baseValue\ difference

MathUtilities.java

@@ -10,8 +10,12 @@ public class MathUtilities {
      * @param difference value to add to starting value
      * @return sum of `baseValue` and `difference`
      */
-    public Integer add(int baseValue, int difference) {
-        return null;
+    public Integer add(int baseValue, int addedValue ) {
+       
+        int sum;
+        sum= baseValue + addedValue;
+        return sum;
+        
     }
 
     /**
@@ -20,7 +24,9 @@ public class MathUtilities {
      * @return sum of `baseValue` and `difference`
      */
     public Long add(long baseValue, long difference) {
-        return null;
+        long diff= baseValue + difference;
+        return diff;
+        
     }
 
     /**
@@ -28,8 +34,8 @@ public class MathUtilities {
      * @param difference value to add to starting value
      * @return sum of `baseValue` and `difference`
      */
-    public Short add(short baseValue, short difference) {
-        return null;
+    public Short add(short baseValue, short addedValue) {
+       return (short)(baseValue + addedValue);
     }
 
     /**
@@ -37,8 +43,8 @@ public class MathUtilities {
      * @param difference value to add to starting value
      * @return sum of `baseValue` and `difference`
      */
-    public Byte add(byte baseValue, byte difference) {
-        return null;
+    public Byte add(byte baseValue, byte addedValue) {
+       return (byte)(baseValue + addedValue);
     }
 
     /**
@@ -46,8 +52,8 @@ public class MathUtilities {
      * @param difference value to add to starting value
      * @return sum of `baseValue` and `difference`
      */
-    public Float add(float baseValue, float difference) {
-        return null;
+    public Float add(float baseValue, float addedValue) {
+        return (float)(baseValue + addedValue);
     }
 
     /**
@@ -55,8 +61,8 @@ public class MathUtilities {
      * @param difference value to add to starting value
      * @return sum of `baseValue` and `difference`
      */
-    public Double add(double baseValue, double difference) {
-        return null;
+    public Double add(double baseValue, double addedValue) {
+        return (double)(baseValue + addedValue);
     }
 
     /**
@@ -65,7 +71,7 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Integer subtract(int baseValue, int difference) {
-        return null;
+        return (int)(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 (long)(baseValue - difference);
     }
 
     /**
@@ -83,7 +89,7 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Short subtract(short baseValue, short difference) {
-        return null;
+        return (short)(baseValue - difference);
     }
 
     /**
@@ -92,7 +98,7 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Byte subtract(byte baseValue, byte difference) {
-        return null;
+        return (byte)(baseValue - difference);
     }
 
     /**
@@ -101,7 +107,7 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Float subtract(float baseValue, float difference) {
-        return null;
+        return (float)(baseValue - difference);
     }
 
     /**
@@ -110,7 +116,7 @@ public class MathUtilities {
      * @return difference between `baseValue` and `difference`
      */
     public Double subtract(double baseValue, double difference) {
-        return null;
+        return  (double)(baseValue - difference);
     }
 
 
@@ -120,7 +126,7 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Integer divide(int dividend, int divisor) {
-        return null;
+        return (int)(dividend / divisor);
     }
 
     /**
@@ -129,7 +135,7 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Long divide(long dividend, long divisor) {
-        return null;
+        return (long)(dividend / divisor);
     }
 
     /**
@@ -138,7 +144,7 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Short divide(short dividend, short divisor) {
-        return null;
+        return (short) ( dividend /divisor);
     }
 
     /**
@@ -147,7 +153,7 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Byte divide(byte dividend, byte divisor) {
-        return null;
+        return (byte)(dividend / divisor);
     }
 
     /**
@@ -156,7 +162,7 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Float divide(float dividend, float divisor) {
-        return null;
+        return (float)(dividend / divisor);
     }
 
     /**
@@ -165,7 +171,7 @@ public class MathUtilities {
      * @return division of `dividend` by `divisor
      */
     public Double divide(double dividend, double divisor) {
-        return null;
+        return (double)(dividend / divisor);
     }
 
 
@@ -175,7 +181,7 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Integer multiply(int multiplicand, int multiplier) {
-        return null;
+        return (int)(multiplicand * multiplier);
     }
 
     /**
@@ -184,7 +190,7 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Long multiply(long multiplicand, long multiplier) {
-        return null;
+        return (long)(multiplicand * multiplier);
     }
 
     /**
@@ -193,7 +199,7 @@ 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 +207,7 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Byte multiply(byte multiplicand, byte multiplier) {
-        return null;
+        return (byte)(multiplicand * multiplier);
     }
 
     /**
@@ -210,7 +216,7 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Float multiply(float multiplicand, float multiplier) {
-        return null;
+        return (float)(multiplicand * multiplier);
     }
 
     /**
@@ -219,7 +225,7 @@ public class MathUtilities {
      * @return product of `multiplicand` by `multiplier`
      */
     public Double multiply(double multiplicand, double multiplier) {
-        return null;
+        return (double)(multiplicand * multiplier);
     }
 
 
@@ -227,14 +233,14 @@ public class MathUtilities {
       * @return true
      */
     public Boolean returnTrue() {
-        return null;
+        return true;
     }
 
     /**
      * @return false
      */
     public Boolean returnFalse() {
-        return null;
+        return false;
     }
 
 }

MathUtilitiesTest.java

@@ -1,7 +1,5 @@
- 
 
 import org.junit.Test;
-
 import static org.junit.Assert.*;
 /**
  * Created by dan on 6/14/17.
@@ -16,10 +14,11 @@ public class MathUtilitiesTest {
         int addedValue = 7;
         int expected = 27;
         // : When
-        int actual = primativeTypes.add(baseValue, addedValue);
+        int actual = primativeTypes.add(baseValue,addedValue);
         // : Then
         assertEquals(expected,actual);
     }
+
     @Test
     public void testAdditions1() {
         // : Given
@@ -31,6 +30,7 @@ public class MathUtilitiesTest {
         // : Then
         assertEquals(expected,actual);
     }
+
     @Test
     public void testAdditions2() {
         // : Given
@@ -54,6 +54,7 @@ public class MathUtilitiesTest {
         // : Then
         assertEquals(expected,actual);
     }
+
     @Test
     public void testAdditions5() {
         // : Given
@@ -85,14 +86,6 @@ public class MathUtilitiesTest {
 
 
 
-
-
-
-
-
-
-
-
     @Test
     public void testSubtractions(){
         // : Given
@@ -104,6 +97,7 @@ public class MathUtilitiesTest {
         // : Then
         assertEquals(expectedInt,actualInt);
     }
+
     @Test
     public void testSubtractions1() {
         // : Given
@@ -115,6 +109,7 @@ public class MathUtilitiesTest {
         // : Then
         assertEquals(expectedLong,actualLong);
     }
+
     @Test
     public void testSubtractions2() {
         // : Given
@@ -126,6 +121,7 @@ public class MathUtilitiesTest {
         // : Then
         assertEquals(expectedShort,actualShort);
     }
+
     @Test
     public void testSubtractions3() {
         // : Given
@@ -137,6 +133,7 @@ public class MathUtilitiesTest {
         // : Then
         assertEquals(expectedByte,actualByte);
     }
+
     @Test
     public void testSubtractions4() {
         // : Given
@@ -148,6 +145,7 @@ public class MathUtilitiesTest {
         // : Then
         assertEquals(expectedFloat,actualFloat, 0.005);
     }
+
     @Test
     public void testSubtractions5() {
         // : Given
@@ -166,13 +164,6 @@ public class MathUtilitiesTest {
 
 
 
-
-
-
-
-
-
-
     @Test
     public void testDivision(){
         // : Given
@@ -184,6 +175,7 @@ public class MathUtilitiesTest {
         // : Then
         assertEquals(expectedInt,actualInt);
     }
+
     @Test
     public void testDivision1() {
         // : Given
@@ -195,6 +187,7 @@ public class MathUtilitiesTest {
         // : Then
         assertEquals(expectedLong,actualLong);
     }
+
     @Test
     public void testDivision2() {
         // : Given
@@ -207,6 +200,7 @@ public class MathUtilitiesTest {
         assertEquals(expectedShort,actualShort);
 
     }
+
     @Test
     public void testDivision3() {
         // : Given
@@ -218,6 +212,7 @@ public class MathUtilitiesTest {
         // : Then
         assertEquals(expectedByte,actualByte);
     }
+
     @Test
     public void testDivision4() {
         // : Given
@@ -229,6 +224,7 @@ public class MathUtilitiesTest {
         // : Then
         assertEquals(expectedFloat,actualFloat, 0);
     }
+
     @Test
     public void testDivision5() {
         // : Given
@@ -249,15 +245,6 @@ public class MathUtilitiesTest {
 
 
 
-
-
-
-
-
-
-
-
-
     @Test
     public void testMultiplication(){
         // : Given
@@ -269,6 +256,7 @@ public class MathUtilitiesTest {
         // : Then
         assertEquals(expectedInt,actualInt);
     }
+
     @Test
     public void testMultiplication1() {
         // : Given
@@ -280,6 +268,7 @@ public class MathUtilitiesTest {
         // : Then
         assertEquals(expectedLong, actualLong);
     }
+
     @Test
     public void testMultiplication2() {
         // : Given
@@ -291,6 +280,7 @@ public class MathUtilitiesTest {
         // : Then
         assertEquals(expectedShort, actualShort);
     }
+
     @Test
     public void testMultiplication3() {
         // : Given
@@ -302,6 +292,7 @@ public class MathUtilitiesTest {
         // : Then
         assertEquals(expectedByte, actualByte);
     }
+
     @Test
     public void testMultiplication4() {
         // : Given
@@ -313,6 +304,7 @@ public class MathUtilitiesTest {
         // : Then
         assertEquals(expectedFloat, actualFloat, 0);
     }
+
     @Test
     public void testMultiplication5() {
         // : Given

PredicateUtilities.java

@@ -10,16 +10,27 @@ public class PredicateUtilities {
      * @return true if `x` is greater than `y`
      */
     public Boolean isGreaterThan(int x, int y) {
-        return null;
+        if(x>y)
+       {
+        return true;
     }
-
+    else
+    { return false;
+    }
+}
     /**
      * @param x
      * @param y
      * @return true if `x` is less than `y`
      */
     public Boolean isLessThan(int x, int y) {
-        return null;
+         if(x<y)
+       {
+        return true;
+    }
+    else
+    { return false;
+    }
     }
 
     /**
@@ -28,7 +39,13 @@ public class PredicateUtilities {
      * @return true if `x` is greater than or equal to `y`
      */
     public Boolean isGreaterThanOrEqualTo(int x, int y) {
-        return null;
+         if(x == y)
+       {
+        return true;
+    }
+    else
+    { return false;
+    }
     }
 
     /**
@@ -37,6 +54,12 @@ public class PredicateUtilities {
      * @return true if `x` is less than or equal to `y`
      */
     public Boolean isLessThanOrEqualTo(int x, int y) {
-        return null;
+         if(x<=y)
+       {
+        return true;
+    }
+    else
+    { return false;
+    }
     }
 }

StringUtilities.java

@@ -1,4 +1,3 @@
- 
 
 /**
  * Created by dan on 6/14/17.
@@ -8,7 +7,7 @@ public class StringUtilities {
      * @return `Hello World` as a string
      */
     public static String getHelloWorld() {
-        return null;
+        return "Hello World";
     }
 
     /**
@@ -17,7 +16,10 @@ public class StringUtilities {
      * @return the concatenation of two strings, `firstSegment`, and `secondSegment`
      */
     public static String concatenation(String firstSegment, String secondSegment){
-        return null;
+        //StringBuilder sb=new StringBuilder().append(firstSegment).append(secondSegment);
+        //return sb.toString();
+        return (firstSegment + secondSegment);
+
     }
 
     /**
@@ -26,7 +28,8 @@ public class StringUtilities {
      * @return the concatenation of an integer, `firstSegment`, and a String, `secondSegment`
      */
     public static String concatenation(int firstSegment, String secondSegment){
-        return null;
+        StringBuilder sum=new StringBuilder().append(firstSegment).append(secondSegment);
+        return sum.toString();
     }
 
     /**
@@ -34,7 +37,8 @@ public class StringUtilities {
      * @return the first 3 characters of `input`
      */
     public static String getPrefix(String input){
-        return null;
+        String str=input.substring(0,3);
+        return str;
     }
 
     /**
@@ -42,7 +46,8 @@ public class StringUtilities {
      * @return the last 3 characters of `input`
      */
     public static String getSuffix(String input){
-        return null;
+        String str=input.substring(input.length() - 3);
+        return str;
     }
 
     /**
@@ -51,7 +56,10 @@ public class StringUtilities {
      * @return the equivalence of two strings, `inputValue` and `comparableValue`
      */
     public static Boolean compareTwoStrings(String inputValue, String comparableValue){
-        return null;
+
+        boolean val =inputValue.equalsIgnoreCase(comparableValue);
+        return val;
+
     }
 
     /**
@@ -59,23 +67,47 @@ public class StringUtilities {
      * @return the middle character of `inputValue`
      */
     public static Character getMiddleCharacter(String inputValue){
-        return null;
+        int len = inputValue.length();
+        char ch[]=inputValue.toCharArray();
+        int c = len/2;
+          if(len%2 == 0)
+          {
+              return ch [c-1];
+            }          
+        else
+        {
+            
+            return ch[c];
+        } 
+      
     }
-
     /**
      * @param spaceDelimitedString a string, representative of a sentence, containing spaces
      * @return the first sequence of characters
      */
     public static String getFirstWord(String spaceDelimitedString){
-        return null;
+        String[] result=spaceDelimitedString.split(" ");
+        /*for(int i = 0; i < spaceDelimitedString.length(); i++)
+        {
+            if(spaceDelimitedString.charAt(i) == ' ')
+            {
+                result = spaceDelimitedString.substring(0, i);
+                break;
+            }
+        }*/
+        return result[0];
+
     }
 
     /**
      * @param spaceDelimitedString a string delimited by spaces
      * @return the second word of a string delimited by spaces.
      */
-    public static String getSecondWord(String spaceDelimitedString){
-        return null;
+    public static String getSecondWord(String spaceDelimitedString)
+
+    {
+       String[] str=spaceDelimitedString.split(" ");
+       return str[1];
     }
 
     /**
@@ -83,6 +115,9 @@ public class StringUtilities {
      * @return an identical string with characters in reverse order.
      */
     public static String reverse(String stringToReverse){
-        return null;
+        StringBuilder a = new StringBuilder(stringToReverse);
+        String str=a.reverse().toString();
+
+        return str;
     }
 }

package.bluej

@@ -1,10 +1,13 @@
 #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
+editor.fx.0.height=714
+editor.fx.0.width=800
+editor.fx.0.x=240
+editor.fx.0.y=23
 objectbench.height=129
-objectbench.width=1171
+objectbench.width=698
 package.divider.horizontal=0.6
 package.divider.vertical=0.7490774907749077
 package.editor.height=399
@@ -13,7 +16,7 @@ package.editor.x=59
 package.editor.y=63
 package.frame.height=600
 package.frame.width=1195
-package.numDependencies=0
+package.numDependencies=1
 package.numTargets=6
 package.showExtends=true
 package.showUses=true