TicTacToe simple array

src/main/java/Uebung_02/TicTacToe_AC1.java

@@ -0,0 +1,189 @@
+package Uebung_02;
+
+import java.util.Arrays;
+import java.util.Random;
+import java.util.Scanner;
+
+public class TicTacToe_AC1 {
+	
+	public static final String EMPTYFIELD = " ";
+	public static final String X = "X";
+	public static final String O = "O";
+	public static String[] gameFields = new String[9];
+	public static final boolean HUMAN = true;
+	public static final boolean BOT = false;
+	
+
+	public static void main(String[] args) {
+		initializeGameStatus();
+		computerMove();
+		printGrid();
+		
+		Scanner scanner = new Scanner(System.in);
+		
+		while(true) {
+			humanMove(scanner);
+			printGrid();
+			if(gameHasEnded()) {
+				System.out.println("\nDu hast gewonnen!");
+				break;
+			}
+			
+			computerMove();
+			printGrid();
+			if(gameHasEnded()) {
+				System.out.println("\nDer Roboter hat gewonnen!");
+				break;
+			}
+		}
+		
+		scanner.close();
+	}
+	
+	
+	public static void initializeGameStatus() {
+		Arrays.fill(gameFields, EMPTYFIELD);
+	}
+	
+	public static void computerMove() {
+		int randomNumber = -1;
+		
+		do {
+			randomNumber = generateNumber();
+		} while(!isFieldChoosable(randomNumber));
+
+		updateStatus(randomNumber, BOT);
+	}
+	
+	public static void humanMove(Scanner scanner) {
+		printOptionsMenu();
+		int choice = -1;
+		
+		do {
+			choice = scanner.nextInt();
+		} while(!isFieldChoosable(choice-1));
+		
+		updateStatus(choice-1, HUMAN);
+	}
+	
+	public static int generateNumber() {
+		Random random = new Random();
+		return random.nextInt(9);
+	}
+	
+	public static boolean isFieldChoosable(int index) {
+		return gameFields[index].equals(EMPTYFIELD);
+	}
+	
+	public static void updateStatus(int index, boolean isHumanMove) {
+		if (isHumanMove) {
+			gameFields[index] = O;
+		} else {
+			gameFields[index] = X;
+		}
+	}
+	
+	public static boolean gameHasEnded() {
+		return noMovesLeft() || gameWasWon();
+	}
+
+	public static boolean noMovesLeft() {
+		for (String s: gameFields) {
+			if(s.equals(EMPTYFIELD)) return false;
+		}
+		System.out.println("\nUnentschieden!");
+		return true;
+	}
+	
+	public static boolean gameWasWon() {
+		return isDiagonalWin() || isHorizontalWin() || isVerticalWin();
+	}
+	
+	public static boolean isDiagonalWin() {
+		if (!gameFields[0].equals(EMPTYFIELD) &&
+			gameFields[0].equals(gameFields[4]) && 
+			gameFields[0].equals(gameFields[8])
+		) return true;
+		
+		if (!gameFields[2].equals(EMPTYFIELD) && 
+			gameFields[2].equals(gameFields[4]) && 
+			gameFields[2].equals(gameFields[6])	
+		) return true;
+		
+		return false;
+	}
+	
+	public static boolean isHorizontalWin() {
+		if (!gameFields[0].equals(EMPTYFIELD) && 
+			gameFields[0].equals(gameFields[1]) &&
+			gameFields[0].equals(gameFields[2])	
+		) return true;
+			
+		if (!gameFields[3].equals(EMPTYFIELD) && 
+			gameFields[3].equals(gameFields[4]) && 
+			gameFields[3].equals(gameFields[5])		
+		) return true;
+		
+		if (!gameFields[6].equals(EMPTYFIELD) && 
+			gameFields[6].equals(gameFields[7]) && 
+			gameFields[6].equals(gameFields[8])		
+		) return true;
+		
+		return false;
+	}
+	
+	public static boolean isVerticalWin() {
+		if (!gameFields[0].equals(EMPTYFIELD) && 
+			gameFields[0].equals(gameFields[3]) &&
+			gameFields[0].equals(gameFields[6])	
+		) return true;
+				
+		if (!gameFields[1].equals(EMPTYFIELD) && 
+			gameFields[1].equals(gameFields[4]) && 
+			gameFields[1].equals(gameFields[7])
+		) return true;
+			
+		if (!gameFields[2].equals(EMPTYFIELD) && 
+			gameFields[2].equals(gameFields[5]) && 	
+			gameFields[2].equals(gameFields[8])
+		) return true;
+		
+		return false;
+	}
+	
+	
+	
+	//Section for helper methods - Strings and outputs//
+	
+	public static void printGrid() {
+		System.out.println("______________________________________________________________________");
+		String grid = "";
+		for (int i = 0; i < 9; i++) {
+			if (i % 3 == 0) grid += "\n";
+			grid += printSquare(gameFields[i]);
+		}
+		System.out.println(grid);
+	}
+	
+	public static String printSquare(String c) {
+		return "[" + c + "]";
+	}
+	
+	public static void printOptionsMenu() {
+		System.out.println("\n\nDu hast die folgende leeren Felder: ");
+		String grid = "";
+		for (int i = 0; i < 9; i++) {
+			if (i % 3 == 0) grid += "\n";
+			grid += choosableOption(i);
+		}
+		System.out.println(grid+"\nGib die Zahl ein, wo du deinen Kreis setzen willst: ");
+	}
+	
+	public static String choosableOption(int index) {
+		if (isFieldChoosable(index)) {
+			return (index + 1) + " ";
+		} else {
+			return "  ";
+		}
+	}
+}