Beginning the FakeCoin practice solutions.

src/Practice/Application.java

@@ -96,7 +96,7 @@ public abstract class Application {
      * @postcondition the menu is displayed.
      */
     private void displayMenu() {
-        System.out.println("-----------------MAIN MENU--------------");
+        System.out.println("-----------------MAIN MENU-----------------");
         for (int index = 0; index < this.numOfOptions; index++) {
             System.out.println((index+1) + ". " + this.menuOptions[index]);
         }

src/Practice/Decrease_Conquer/FakeCoin.java

@@ -0,0 +1,103 @@
+package Practice.Decrease_Conquer;
+
+import Practice.Application;
+
+public class FakeCoin extends Application {
+
+    private Coin[] pile;
+    private boolean setLocation;
+
+    /**
+     * Starts the application.
+     * @param args the application arguments.
+     */
+    public static void main(String[] args) {
+        Application program = new FakeCoin();
+        program.start();
+    }
+
+    /**
+     * Creates a new FakeCoin application.
+     *
+     * @precondition none
+     * @postcondition a new FakeCoin application is created.
+     */
+    public FakeCoin() {
+        super(new String[]{"The number of coins","Set FakeCoin Weight and Location","Find Fake Coin"});
+        this.setLocation = false;
+    }
+
+    @Override
+    public void executeOption(int option) {
+        switch (option) {
+            case 1:
+                System.out.println("Please enter a number of coins in the pile (including fake coin).");
+                System.out.print("Coin Count: ");
+                int numOfCoins = this.getIntegerInput();
+                while (numOfCoins < 1) {
+                    System.out.println();
+                    System.out.println("Please enter a positive value.");
+                    System.out.print("Coin Count: ");
+                    numOfCoins = this.getIntegerInput();
+                }
+                this.pile = new Coin[numOfCoins];
+                break;
+            case 2:
+                if (this.pile == null) {
+                    System.out.println("Please specify a number of coins before setting the fake location.");
+                    break;
+                }
+
+                System.out.println("Please specify a location for the fake coin. Between 0 and " + (this.pile.length-1));
+                System.out.print("Location: ");
+                int location = this.getIntegerInput();
+                while (location < 0 || location >= this.pile.length) {
+                    System.out.println();
+                    System.out.println("Please enter a valid location: Between 0 and " + (this.pile.length-1));
+                    System.out.print("Location: ");
+                    location = this.getIntegerInput();
+                }
+
+                /* Implement the functionality to do both lighter and heavier. */
+                this.pile[location] = new Fake(location,true);
+                for (int i = 0; i < this.pile.length; i++) {
+                    if (this.pile[i] == null) {
+                        this.pile[i] = new Coin(i);
+                    }
+                }
+                this.setLocation = true;
+                break;
+            case 3:
+                if (!this.setLocation) {
+                    System.out.println("Please specify the fake coins location.");
+                    break;
+                }
+                this.performAlgorithm();
+                break;
+        }
+        System.out.println();
+    }
+
+    private void performAlgorithm() {
+
+    }
+
+    private static class Coin {
+        public int weight;
+        public int location;
+        public Coin(int location) {
+            this.weight = 3;
+            this.location = location;
+        }
+    }
+
+    private static class Fake extends Coin {
+        public Fake(int location, boolean isLighter) {
+            super(location);
+            if (isLighter)
+                super.weight = 2;
+            else
+                super.weight = 4;
+        }
+    }
+}