Various improvements

src/idh/hotseatgames/HotSeatGames.java

@@ -39,14 +39,22 @@ private HotSeatGames() {
 		StringUtils.slideInText(
 				ResourceReader.readResource("intro_banner.ascii", getClass()),
 				150, 4);
-
 		StringUtils.printLineBreaks(1);
 
-		this.input = UserInput.instance(); // create user input wrapper instance
-		this.players = createPlayers(); // create players
-		this.games = createGames(); // create list of games to play
-		this.startGames(); // start games
-		this.input.close(); // close user input resources
+		input = UserInput.instance(); // create user input wrapper instance
+		boolean restart = false;
+
+		do {
+			players = createPlayers(); // create players
+			games = createGames(); // create list of games to play
+			startGames(); // start games
+			// ask if player want to play another round
+			restart = !input.prompt("> Do you want to play another round? (y/n)", "[yn]")
+					.toLowerCase()
+					.equals("n");
+		} while (restart);
+
+		input.close(); // close user input resources
 	}
 
 	private void startGames() {

src/idh/hotseatgames/utils/StringUtils.java

@@ -98,12 +98,12 @@ public static String layout(String text, int charsPerLine, int pad) {
 
 	/**
 	 * Returns a sequence of blank spaces of the given length {@code width}.
-	 * @param width The padding width / length of blank spaces sequence (must be greater than 0)
+	 * @param width The padding width / length of blank spaces sequence (must be at least 0)
 	 * @return The resulting blank spaces sequence
 	 */
 	public static String padString(int width) {
-		if (width <= 0)
-			throw new IllegalArgumentException("Padding width must be > 0.");
+		if (width < 0)
+			throw new IllegalArgumentException("Padding width must be >= 0.");
 		return width > 0 ? String.format("%" + width + "s", "") : "";
 	}
 

src/idh/hotseatgames/utils/UserInput.java

@@ -18,7 +18,7 @@ public class UserInput {
 	 * A private constructor (can only be called from within this class!)
 	 */
 	private UserInput() {
-		this.scanner = new Scanner(System.in);
+		scanner = new Scanner(System.in);
 	}
 
 	/**
@@ -41,7 +41,7 @@ public static UserInput instance() {
 	 */
 	public String prompt(String prompt) {
 		System.out.print(prompt.trim() + " ");
-		return this.scanner.nextLine();
+		return scanner.nextLine();
 	}
 
 	/**
@@ -77,10 +77,12 @@ public int prompt(String prompt, int min, int max) {
 	}
 
 	/**
-	 * Cleans up the resources used by this instance
+	 * Cleans up the resources used by this instance.
+	 * This method should NEVER be called from within a game, as the input stream is managed
+	 * by the engine. Once it is closed, the engine loses access to the input stream (bad!).
 	 */
 	public void close() {
-		this.scanner.close();
+		scanner.close();
 	}
 
 }