Data commit

Task/Number-reversal-game/Java/number-reversal-game.java

@@ -0,0 +1,73 @@
+import java.util.List;
+import java.util.ArrayList;
+import java.util.Scanner;
+import java.util.Collections;
+
+
+public class ReversalGame {
+    private List<Integer> gameList;
+
+    public ReversalGame() {
+        initialize();
+    }
+
+    public void play() throws Exception {
+        int i = 0;
+        int moveCount = 0;
+        Scanner scanner = new Scanner(System.in);
+        while (true) {
+            System.out.println(gameList);
+            System.out.println("Please enter a index to reverse from 2 to 9. Enter 99 to quit");
+            i = scanner.nextInt();
+            if (i == 99) {
+                break;
+            }
+            if (i < 2 || i > 9) {
+                System.out.println("Invalid input");
+            } else {
+                moveCount++;
+                reverse(i);
+                if (isSorted()) {
+                    System.out.println("Congratulations you solved this in " + moveCount + " moves!");
+                    break;
+                }
+            }
+
+        }
+        scanner.close();
+    }
+
+    private void reverse(int position) {
+        Collections.reverse(gameList.subList(0, position));
+    }
+
+    private boolean isSorted() {
+        for (int i=0; i < gameList.size() - 1; ++i) {
+            if (gameList.get(i).compareTo(gameList.get(i + 1)) > 0) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    private void initialize() {
+        this.gameList = new ArrayList<Integer>(9);
+        for (int i=1; i < 10; ++i) {
+            gameList.add(i);
+        }
+        while (isSorted()) {
+            Collections.shuffle(gameList);
+        }
+    }
+
+
+    public static void main(String[] args) {
+        try {
+            ReversalGame game = new ReversalGame();
+            game.play();
+        } catch (Exception e) {
+            System.out.println(e.getMessage());
+            e.printStackTrace();
+        }
+    }
+}