NumberUtilities.java

- 
-
 
 public class NumberUtilities {
-    
     public static String getRange(int start) {
-        return null;
-    }
-    
+        StringBuilder builder = new StringBuilder();
+        for (int i=0 ; i< start ; i++){
+            builder.append(i);
+        }
+        return "" + builder;
+    }  
+
     public static String getRange(int start, int stop) {
-        return null;
-    }
+        StringBuilder builder = new StringBuilder();
+        for (int i = start ; i < stop ; i ++){
+            builder.append(i);
+        }
 
+        return "" + builder;
+    }
 
     public static String getRange(int start, int stop, int step) {
-        return null;
+        StringBuilder builder = new StringBuilder();
+        for (int i = start ; i < stop ; i+=step){
+            builder.append(i);
+        }
+
+        return "" + builder;
     }
-    
+
     public static String getEvenNumbers(int start, int stop) {
-        return null;
-    }
+        StringBuilder builder = new StringBuilder();
+        for (int i = start ; i < stop ; i++){
+            if (i % 2 == 0) {
+            builder.append(i);
+        }}
 
+        return "" + builder;
+    }
 
     public static String getOddNumbers(int start, int stop) {
-        return null;
-    }
+        StringBuilder builder = new StringBuilder();
+        for (int i = start ; i < stop ; i++){
+            if (i % 2 != 0){
+            builder.append(i);
+        }}
 
+        return "" + builder;
+    }
 
     public static String getExponentiations(int start, int stop, int exponent) {
-        return null;
+        StringBuilder builder = new StringBuilder();
+        for (int i = start ; i <= stop ; i++){
+            int e = (int)Math.pow(i,exponent);
+
+            builder.append(e);
+        }
+
+        return "" + builder;
     }
 }

TableUtilities.java

 
 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 builder = new StringBuilder();
+        for (int i = 1 ; i<= tableSize; i++) {
+            for (int t = 1 ; t <= tableSize; t++) {
+            builder.append(String.format("%3d |", (i*t)));
+            
+            }
+            builder.append("\n");
+            
+        
+        } return builder.toString();
     }
 }
+

TriangleUtilities.java

- 
 
 public class TriangleUtilities {
-
     public static String getRow(int numberOfStars) {
-        return null;
+        StringBuilder builder = new StringBuilder();
+        for (int i = 1 ; i<= numberOfStars; i++){
+            builder.append('*');
+
+        }
+        return builder.toString();
+
     }
-    
+
     public static String getTriangle(int numberOfRows) {
-        return null;
+        StringBuilder builder = new StringBuilder();
+        for (int i = 1 ; i <= numberOfRows; i++){
+            String triangle = getRow(i);
+            builder.append(triangle + "\n");  
+
+        }
+        return builder.toString();
+
     }
 
 
     public static String getSmallTriangle() {
-        return null;
+        return getTriangle(4);
     }
 
     public static String getLargeTriangle() {
-        return null;
+        return getTriangle(9);
     }
 }

package.bluej

 #BlueJ package file
-dependency1.from=NumberUtilitiesTest
-dependency1.to=NumberUtilities
+dependency1.from=TriangleUtilitiesTest
+dependency1.to=TriangleUtilities
 dependency1.type=UsesDependency
-dependency2.from=TriangleUtilitiesTest
-dependency2.to=TriangleUtilities
+dependency2.from=TableUtilitiesTest
+dependency2.to=TableUtilities
 dependency2.type=UsesDependency
-dependency3.from=TableUtilitiesTest
-dependency3.to=TableUtilities
+dependency3.from=NumberUtilitiesTest
+dependency3.to=NumberUtilities
 dependency3.type=UsesDependency
 editor.fx.0.height=722
 editor.fx.0.width=800
-editor.fx.0.x=537
-editor.fx.0.y=28
-objectbench.height=164
-objectbench.width=484
-package.divider.horizontal=0.6
-package.divider.vertical=0.7560627674750356
-package.editor.height=523
-package.editor.width=382
-package.editor.x=20
-package.editor.y=57
+editor.fx.0.x=-192
+editor.fx.0.y=-722
+objectbench.height=98
+objectbench.width=387
+package.divider.horizontal=0.5996955859969558
+package.divider.vertical=0.8502139800285307
+package.editor.height=589
+package.editor.width=551
+package.editor.x=-181
+package.editor.y=-1001
 package.frame.height=759
-package.frame.width=508
+package.frame.width=677
 package.numDependencies=3
 package.numTargets=6
 package.showExtends=true