Create Asterisks exercise

This is just part 2 of the RowsCols exercise.
Breaking it into multiple exercises makes it more
manageable.

Author: phrdang

src/com/codefortomorrow/intermediate/chapter10/practice/Asterisks.java

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+package com.codefortomorrow.intermediate.chapter10.practice;
+
+/*
+Asterisks
+
+Fill a 3 X 3 string array so that the values
+in each row are "*", "**", "***".
+Print the values in 3 rows of 3 elements, each separated by a tab.
+Fill the array with values using a loop.
+Keep track of the total number of asterisks in the array,
+and print it below the array values.
+*/
+
+public class Asterisks {
+    public static void main(String[] args) {
+        // write code here
+    }
+}

src/com/codefortomorrow/intermediate/chapter10/solutions/Asterisks.java

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+package com.codefortomorrow.intermediate.chapter10.solutions;
+
+/*
+Asterisks
+
+Fill a 3 X 3 string array so that the values
+in each row are "*", "**", "***".
+Print the values in 3 rows of 3 elements, each separated by a tab.
+Fill the array with values using a loop.
+Keep track of the total number of asterisks in the array,
+and print it below the array values.
+*/
+
+public class Asterisks {
+    public static void main(String[] args) {
+        // create a 3x3 array
+		String[][] b = new String[3][3]; 
+		String asterisks = "*";
+		int numberOfAsterisks = 0;
+
+		// iterate through the 3x3 array
+		for (int row = 0; row < 3; row++) {
+			for (int col = 0; col < 3; col++) {
+				// store the asterisk(s) in the array
+				b[row][col] = asterisks;
+
+				// print the current element
+				System.out.print(b[row][col] + "\t");
+
+				// update total number of asterisks in array
+				numberOfAsterisks += row + 1;
+			}
+			System.out.println(); // move to next row
+			asterisks += "*"; // each row has 1 more asterisk than the last one
+		}
+
+		// print the total number of asterisks in the array
+		System.out.println("Number of asterisks: " + numberOfAsterisks);
+    }
+}