all done

src/main/java/io/zipcoder/microlabs/mastering_loops/NumberUtilities.java

@@ -3,26 +3,56 @@
 
 public class NumberUtilities {
     public static String getEvenNumbers(int start, int stop) {
-        return null;
+        return getRange(start + (start % 2), stop, 2);
     }
 
+/* //Kris wrote this, look at it later
+    public static String getEvenNumbersk(int start, int stop) { //
+        for ({String s = ""; int i=start;}; i < stop;i++) s = s + ((i % 2 == 0) ? i  : "");
+        return s;
+    }
+*/
 
     public static String getOddNumbers(int start, int stop) {
-        return null;
+        return getRange((start % 2 != 0) ? start : start+1, stop, 2);
     }
 
-
     public static String getSquareNumbers(int start, int stop, int step) {
-        return null;
+        return getExponentiations(start, stop, step, 2);
+    }
+
+    public static String getPerfectSquares(int start, int stop) {
+        StringBuilder sb = new StringBuilder();
+        for (int i=start;i<stop;i++) {
+            if (Math.round(Math.sqrt(i)) == Math.sqrt(i)) { //if the number is the same after round() its a perfect square
+                sb.append(i);
+            }
+        }
+        return sb.toString();
     }
 
+    public static String getRange(int stop) {
+        return getRange(0, stop, 1);
+    }
+
+    public static String getRange(int start, int stop) {
+        return getRange(start, stop, 1);
+    }
 
     public static String getRange(int start, int stop, int step) {
-        return null;
+       StringBuilder sb = new StringBuilder();
+       for (int i=start;i<stop;i+=step) {
+           sb.append(i);
+       }
+       return sb.toString();
     }
 
 
     public static String getExponentiations(int start, int stop, int step, int exponent) {
-        return null;
+        StringBuilder sb = new StringBuilder();
+        for (int i = start;i<stop;i+=step) {
+            sb.append((int)Math.pow(i, exponent));
+        }
+        return sb.toString();
     }
 }

src/main/java/io/zipcoder/microlabs/mastering_loops/TableUtilities.java

@@ -2,14 +2,21 @@
 
 public class TableUtilities {
     public static String getSmallMultiplicationTable() {
-        return null;
+        return getMultiplicationTable(5);
     }
 
     public static String getLargeMultiplicationTable() {
-        return null;
+        return getMultiplicationTable(10);
     }
 
     public static String getMultiplicationTable(int tableSize) {
-        return null;
+        StringBuilder sb = new StringBuilder();
+        for (int i = 1; i <= tableSize; i++) {
+            for (int j = 1; j <= tableSize; j++) {
+                sb.append(String.format("%1$3s |", (i * j)));
+            }
+            sb.append("\n");
+        }
+        return sb.toString();
     }
 }

src/main/java/io/zipcoder/microlabs/mastering_loops/TriangleUtilities.java

@@ -3,18 +3,27 @@
 public class TriangleUtilities {
 
     public static String getTriangle(int numberOfRows) {
-        return null;
+        StringBuilder sb = new StringBuilder();
+        for (int i=1;i<=numberOfRows;i++) {
+            sb.append(getRow((i)));
+            sb.append("\n");
+        }
+        return sb.toString();
     }
 
     public static String getRow(int numberOfStars) {
-        return null;
+        StringBuilder sb = new StringBuilder();
+        for (int i=0;i<numberOfStars;i++) {
+            sb.append("*");
+        }
+        return sb.toString();
     }
 
     public static String getSmallTriangle() {
-        return null;
+        return getTriangle(4);
     }
 
     public static String getLargeTriangle() {
-        return null;
+        return getTriangle(10);
     }
 }

src/test/java/io/zipcoder/microlabs/mastering_loops/NumberUtilitiesTest.java

@@ -49,29 +49,28 @@ public void testGetRange2() {
 
 
     @Test
-    public void testGetEvenNumbers() {
+    public void testGetOddNumbers() {
         // : Given
         String expected = "5791113151719";
         int start = 5;
         int stop = 20;
 
         // : When
-        String actual = NumberUtilities.getEvenNumbers(start, stop);
+        String actual = NumberUtilities.getOddNumbers(start, stop);
 
         // : Then
         Assert.assertEquals(expected, actual);
     }
 
     @Test
-    public void testGetOddNumbers() {
+    public void testGetEvenNumbers() {
         // : Given
         String expected = "681012141618";
         int start = 5;
         int stop = 20;
-        int step = 5;
 
         // : When
-        String actual = NumberUtilities.getOddNumbers(start, stop);
+        String actual = NumberUtilities.getEvenNumbers(start, stop);
 
         // : Then
         Assert.assertEquals(expected, actual);
@@ -94,6 +93,17 @@ public void testGetSquareNumbers() {
         Assert.assertEquals(expected, actual);
     }
 
+    @Test
+    public void testGetPerfectSquares() {
+        // : Given
+        String expected = "14916253649";
+        int start = 1;
+        int stop = 50;
+
+        // : When
+        String actual = NumberUtilities.getPerfectSquares(start, stop);
+    }
+
 
     @Test
     public void testGetExponentiationNumbers() {
@@ -109,4 +119,29 @@ public void testGetExponentiationNumbers() {
 
         Assert.assertEquals(expected, actual);
     }
+
+    @Test
+    public void testGetRangeWithOneParam() {
+        // : Given
+        String expected = "0123456789101112131415161718";
+        int stop = 19;
+
+        // : When
+        String actual = NumberUtilities.getRange(stop);
+
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void testGetRangeWithTwoParams() {
+        // : Given
+        String expected = "5678910";
+        int start = 5;
+        int stop = 11;
+
+        // : When
+        String actual = NumberUtilities.getRange(start, stop);
+
+        Assert.assertEquals(expected, actual);
+    }
 }

src/test/java/io/zipcoder/microlabs/mastering_loops/TriangleUtilitiesTest.java

@@ -27,7 +27,7 @@ public void getTriangleTest1() {
                         "*******\n" +
                         "********\n" +
                         "*********\n";
-        String actual = TriangleUtilities.getTriangle(10);
+        String actual = TriangleUtilities.getTriangle(9); //input 9, get a 9 x 9, actually expect a 9x9
         Assert.assertEquals(expected, actual);
     }
 
@@ -38,7 +38,7 @@ public void getTriangleTest2() {
                         "**\n" +
                         "***\n" +
                         "****\n";
-        String actual = TriangleUtilities.getTriangle(5);
+        String actual = TriangleUtilities.getTriangle(4); // see above..
         Assert.assertEquals(expected, actual);
     }
 
@@ -53,7 +53,8 @@ public void testGetLargeTriangle() {
                 "******\n" +
                 "*******\n" +
                 "********\n" +
-                "*********\n";
+                "*********\n" +
+                "**********\n";
         String actual = TriangleUtilities.getLargeTriangle();
         Assert.assertEquals(expected, actual);
     }