X si Zero in Java

Main.java

package com.boogie666.tictactoe;

import java.util.Scanner;

public class Main {
    private static char X = 'X';
    private static char ZERO = 'O';
    private static char NIMIC = '-';

    private static char[][] tabla = {
            {NIMIC, NIMIC, NIMIC},
            {NIMIC, NIMIC, NIMIC},
            {NIMIC, NIMIC, NIMIC}
    };

    public static void main(String[] args) {

        boolean sfarsitDeJoc = false;

        char jucatorCurent = ZERO;

        while (!sfarsitDeJoc) {
            afiseazaTabla(tabla);
            jucatorCurent = jucatorulUrmator(jucatorCurent);
            mutare(tabla, jucatorCurent);
            sfarsitDeJoc = verificaSfarsit(tabla, jucatorCurent);
        }
        afiseazaRezultat(tabla, jucatorCurent);


    }


    public static boolean verificaSfarsit(char[][] tabla, char jucatorCurent) {
        return victorie(tabla, jucatorCurent) || egalitate(tabla);
    }

    public static boolean victorie(char[][] tabla, char jucatorCurent){
        return castigPeLinie(tabla, jucatorCurent) ||
                castigPeColoana(tabla, jucatorCurent) ||
                castigPeDiagonala(tabla, jucatorCurent);
    }


    public static boolean egalitate(char[][] tabla){
        // daca nu exista nici un spatiu gol, atunci este egalitate
        for(int i = 0; i < tabla.length; i++){
            for(int j = 0; j < tabla[i].length; j++){
                if(tabla[i][j] == NIMIC){
                    return false;
                }
            }
        }
        return true;
    }


    public static boolean castigPeDiagonala(char[][] tabla, char jucatorCurent){
        if(tabla[0][0] == jucatorCurent && tabla[1][1] == jucatorCurent && tabla[2][2] == jucatorCurent){
            return true; // digonala principala
        }
        if(tabla[0][2] == jucatorCurent && tabla[1][1] == jucatorCurent && tabla[2][0] == jucatorCurent){
            return true; // digonala secundara
        }
        return false; // nu o castigat pe diagonala.
    }


    public static boolean castigPeColoana(char[][] tabla, char jucatorCurent){
        for(int j = 0; j < tabla.length; j++){
            if(tabla[0][j] == jucatorCurent && tabla[1][j] == jucatorCurent &&  tabla[2][j] == jucatorCurent) {
                return true;
            }
        }
        return false; // nu o castigat pe coloana
    }

    public static boolean castigPeLinie(char[][] tabla, char jucatorCurent){
        for(int i = 0; i < tabla.length; i++){
            if(tabla[i][0] == jucatorCurent && tabla[i][1] == jucatorCurent &&  tabla[i][2] == jucatorCurent) {
                return true;
            }
        }
        return false; // nu o castigat pe linie
    }



    public static void mutare(char[][] tabla, char jucatorCurent) {
        int[] iSiJ = citesteMutare(jucatorCurent);
        int i = iSiJ[0];
        int j = iSiJ[1];
        if (mutareValida(tabla, i, j)) {
            tabla[i][j] = jucatorCurent; // pune piesa pe tabla.
        } else {
            mutare(tabla, jucatorCurent); // mai face odata
        }
    }

    private static boolean mutareValida(char[][] tabla, int i, int j) {
        return tabla[i][j] == NIMIC;
    }

    public static int[] citesteMutare(char jucatorCurent) {
        System.out.println("Jucatorul " + jucatorCurent + " muta:");
        Scanner s = new Scanner(System.in);
        String text = s.nextLine();
        String[] iSiJ = text.split(" ");
        return new int[]{Integer.valueOf(iSiJ[0]), Integer.valueOf(iSiJ[1])};
    }


    private static char jucatorulUrmator(char jucatorCurent) {
        if (jucatorCurent == X) { // dupa X ii ZERO
            return ZERO;
        } else { // dupa ZERO ii X
            return X;
        }
    }


    private static void afiseazaTabla(char[][] tabla) {
        for (int i = 0; i < tabla.length; i++) {
            for (int j = 0; j < tabla.length; j++) {
                System.out.print(tabla[i][j] + " ");
            }
            System.out.println();
        }
    }

    private static void afiseazaRezultat(char[][] tabla, char jucatorCurent) {
        afiseazaTabla(tabla);
        if(victorie(tabla, jucatorCurent)){
            System.out.println("Jucatorul " + jucatorCurent + " a castigat!");
        }else {
            System.out.println("Egaliate!");
        }
    }
}