Adding early CS challenge solutions

CS7 - Challenge Solution/Ball.java

@@ -0,0 +1,33 @@
+public class Ball {
+    private double diameter;
+    private String color;
+    private int timesBounced;
+
+    public Ball(double newDiameter, String newColor) {
+        diameter = newDiameter;
+        color = newColor;
+        timesBounced = 0;
+    }
+
+    public double getDiameter() {
+        return diameter;
+    }
+
+    public String getColor() {
+        return color;
+    }
+
+    public int getTimesBounced() {
+        return timesBounced;
+    }
+
+    public void bounceBall() {
+        timesBounced++;
+    }
+
+    public String toString() {
+        return "This ball is " + color + " with a diameter of " +
+            diameter + " and has been bounced " + timesBounced + 
+            " times!";
+    }
+}

CS7 - Challenge Solution/Main.java

@@ -0,0 +1,15 @@
+public class Main {
+    public static void main(String[] args) {
+        Ball ball1 = new Ball(5, "Red");
+        Ball ball2 = new Ball(1, "Yellow");
+
+        for(int i = 0; i < 10; i++) {
+            ball1.bounceBall();
+        }
+
+        ball2.bounceBall();
+
+        System.out.println(ball1);
+        System.out.println(ball2);
+    }
+}