loops tables and triangles

NumberUtilities.java

@@ -1,32 +1,75 @@
- 
+ import static java.lang.Math.pow;
 
 
 public class NumberUtilities {
     
     public static String getRange(int start) {
-        return null;
+        
+        String s="";
+        
+        for(int i =0; i < start; i++)
+        {
+            s = s +i;
+        }
+        return s;
     }
     
     public static String getRange(int start, int stop) {
-        return null;
+        String s2 = "";
+        for(int i = start; i<stop; i++)
+        {
+            s2 = s2 + i;
+        }
+        return s2;
     }
 
 
     public static String getRange(int start, int stop, int step) {
-        return null;
+        String s3 = "";
+        for(int i = start; i < stop; i+=step)
+        {
+            s3 = s3 +i;
+        }
+        return s3;
     }
     
     public static String getEvenNumbers(int start, int stop) {
-        return null;
+        String s4 = "";
+        for(int i = start; i < stop; i++)
+        {
+            if((i&1)==0)
+            {
+                s4+=i;
+            }
+        }
+        
+       return s4;
     }
 
 
     public static String getOddNumbers(int start, int stop) {
-        return null;
+        String s5 = "";
+        for(int i = start; i<stop; i++)
+        {
+            if((i&1)!=0)
+            {
+                s5+=i;
+            }
+        }
+       
+        return s5;
     }
 
 
     public static String getExponentiations(int start, int stop, int exponent) {
-        return null;
+        String s6="";
+        
+        for(int i = start; i <= stop; i++)
+        {
+            s6 = s6 + (int)Math.pow(i, exponent);
+            
+        }
+
+        return s6;
     }
 }

TableUtilities.java

@@ -2,14 +2,50 @@
 
 public class TableUtilities {
     public static String getSmallMultiplicationTable() {
-        return null;
+        StringBuilder table = new StringBuilder();
+        
+        for(int row = 1; row<=5; row++)
+        {
+            
+            for(int col = 1; col <= 5; col++)
+                {
+                    table.append(String.format("%3d |",row*col));
+                }
+                table.append("\n");
+        }
+   
+        return table.toString();
     }
 
     public static String getLargeMultiplicationTable() {
-        return null;
+        StringBuilder table = new StringBuilder();
+        
+        for(int row = 1; row<=10; row++)
+        {
+            
+            for(int col = 1; col <= 10; col++)
+                {
+                    table.append(String.format("%3d |",row*col));
+                }
+                table.append("\n");
+        }
+   
+        return table.toString();
     }
 
     public static String getMultiplicationTable(int tableSize) {
-        return null;
+        StringBuilder table = new StringBuilder();
+        
+        for(int row = 1; row<=tableSize; row++)
+        {
+            
+            for(int col = 1; col <= tableSize; col++)
+                {
+                    table.append(String.format("%3d |",row*col));
+                }
+                table.append("\n");
+        }
+   
+        return table.toString();
     }
 }

TriangleUtilities.java

@@ -3,19 +3,64 @@
 public class TriangleUtilities {
 
     public static String getRow(int numberOfStars) {
-        return null;
+        int counter = 0;
+        String star = "*";
+        for(int i = 1; i < numberOfStars; i++)
+        {
+            star = star + "*";
+           // counter++; this was for me to count the *s fixing my code
+            
+        }
+        //System.out.println("number: " + counter); ^
+        return star;
     }
     
     public static String getTriangle(int numberOfRows) {
-        return null;
+        int coumter;
+        StringBuilder star = new StringBuilder();
+
+        for(int i =1; i <= numberOfRows; i++)
+        {
+            for(int j=1;j<=i;j++)
+            {
+                star.append("*");
+            }
+                star.append("\n");
+        }
+
+        return star.toString();
+  
     }
 
 
     public static String getSmallTriangle() {
-        return null;
+        
+        StringBuilder star = new StringBuilder();
+
+        for(int i =1; i <= 4; i++)
+        {
+            for(int j=1;j<=i;j++)
+            {
+                star.append("*");
+            }
+                star.append("\n");
+        }
+
+        return star.toString();
     }
 
     public static String getLargeTriangle() {
-        return null;
+        StringBuilder star = new StringBuilder();
+
+        for(int i =1; i <= 9; i++)
+        {
+            for(int j=1;j<=i;j++)
+            {
+                star.append("*");
+            }
+                star.append("\n");
+        }
+
+        return star.toString();
     }
 }

package.bluej

@@ -1,27 +1,27 @@
 #BlueJ package file
-dependency1.from=NumberUtilitiesTest
-dependency1.to=NumberUtilities
+dependency1.from=TableUtilitiesTest
+dependency1.to=TableUtilities
 dependency1.type=UsesDependency
-dependency2.from=TriangleUtilitiesTest
-dependency2.to=TriangleUtilities
+dependency2.from=NumberUtilitiesTest
+dependency2.to=NumberUtilities
 dependency2.type=UsesDependency
-dependency3.from=TableUtilitiesTest
-dependency3.to=TableUtilities
+dependency3.from=TriangleUtilitiesTest
+dependency3.to=TriangleUtilities
 dependency3.type=UsesDependency
-editor.fx.0.height=722
+editor.fx.0.height=716
 editor.fx.0.width=800
-editor.fx.0.x=537
-editor.fx.0.y=28
-objectbench.height=164
-objectbench.width=484
+editor.fx.0.x=505
+editor.fx.0.y=29
+objectbench.height=135
+objectbench.width=539
 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
-package.frame.height=759
-package.frame.width=508
+package.divider.vertical=0.7408759124087592
+package.editor.height=399
+package.editor.width=437
+package.editor.x=215
+package.editor.y=47
+package.frame.height=606
+package.frame.width=563
 package.numDependencies=3
 package.numTargets=6
 package.showExtends=true