About 2 weeks ago I made a Java game of Tic-Tac-Toe. It turned out great and it worked but it needed lots of help before it became a decent program. Since then, I have worked out lots of the kinks and errors. I would love to know what you think of my improved program.public class ADitionalPractice {public static boolean detection(boolean iswinning, char[][] board) {    if (( + board[0][0] + board[1][0] + board[2][0]).equals(xxx)) {        iswinning = true;    } else if (( + board[1][0] + board[1][1] + board[2][1]).equals(xxx)) {        iswinning = true;    } else if (( + board[0][2] + board[1][2] + board[2][2]).equals(xxx)) {        iswinning = true;    } else if (( + board[0][0] + board[1][1] + board[2][2]).equals(xxx)) {        iswinning = true;    } else if (( + board[2][0] + board[1][1] + board[0][2]).equals(xxx)) {        iswinning = true;    } else if (( + board[0][0] + board[0][1] + board[0][2]).equals(xxx)) {        iswinning = true;    } else if (( + board[1][0] + board[1][1] + board[1][2]).equals(xxx)) {        iswinning = true;    } else if (( + board[2][0] + board[2][1] + board[2][2]).equals(xxx)) {        iswinning = true;    }    return iswinning;}public static boolean detection1(boolean iswinning1, char[][] board) {    if (( + board[0][0] + board[1][0] + board[2][0]).equals(ooo)) {        iswinning1 = true;    } else if (( + board[1][0] + board[1][1] + board[2][1]).equals(ooo)) {        iswinning1 = true;    } else if (( + board[0][2] + board[1][2] + board[2][2]).equals(ooo)) {        iswinning1 = true;    } else if (( + board[0][0] + board[1][1] + board[2][2]).equals(ooo)) {        iswinning1 = true;    } else if (( + board[2][0] + board[1][1] + board[0][2]).equals(ooo)) {        iswinning1 = true;    } else if (( + board[0][0] + board[0][1] + board[0][2]).equals(ooo)) {        iswinning1 = true;    } else if (( + board[1][0] + board[1][1] + board[1][2]).equals(ooo)) {        iswinning1 = true;    } else if (( + board[2][0] + board[2][1] + board[2][2]).equals(ooo)) {        iswinning1 = true;    }    return iswinning1;}public static void main(String[] args) {    Scanner keyboard = new Scanner(System.in);    char board[][] = new char[3][3];    int turn = 1;    int y = 0;    boolean validinput;    boolean iswinning = false;    boolean iswinning1 = false;    while (true) {        if (turn == 1) {            System.out.println(player 1 it is your turn. your spot you wou                    + ld like to enter.\n Ex: top,botton,middle left,right,middle);            String input = keyboard.nextLine();            validinput = true;            if (input.equals(top left) && board[0][0] == '\u0000') {                board[0][0] = 'x';            } else if (input.equals(top middle) && board[1][0] == '\u0000') {                board[1][0] = 'x';            } else if (input.equals(top right) && board[2][0] == '\u0000') {                board[2][0] = 'x';            } else if (input.equals(middle left) && board[0][1] == '\u0000') {                board[0][1] = 'x';            } else if (input.equals(middle middle) && board[1][1] == '\u0000') {                board[1][1] = 'x';            } else if (input.equals(middle right) && board[2][1] == '\u0000') {                board[2][1] = 'x';            } else if (input.equals(bottom left) && board[0][2] == '\u0000') {                board[0][2] = 'x';            } else if (input.equals(bottom middle) && board[1][2] == '\u0000') {                board[1][2] = 'x';            } else if (input.equals(bottom right) && board[2][2] == '\u0000') {                board[2][2] = 'x';            } else {                System.out.println(You have entered an invalid space                         + please try again.);                validinput = false;            }            if (validinput == true) {                y++;                turn++;            }            System.out.printf( %c | %c | %c \n, board[0][0], board[1][0], board[2][0]);            System.out.printf(____________\n);            System.out.printf( %c | %c | %c \n, board[0][1], board[1][1], board[2][1]);            System.out.printf(____________\n);            System.out.printf( %c | %c | %c \n, board[0][2], board[1][2], board[2][2]);           iswinning=detection(iswinning, board);             if (iswinning == true) {                System.out.println(Player 1 wins!);                System.exit(1);            }            if (y == 9) {                System.out.println(the game ends in a draw.);                System.exit(1);            }        }        if (turn == 2) {            System.out.println(player 2 it is your turn. your spot you                    +  would like to enter.\n Ex: top,botton,middle left,right,middle);            String input = keyboard.nextLine();            validinput = true;            if (input.equals(top left) && board[0][0] == '\u0000') {                board[0][0] = 'o';            } else if (input.equals(top middle) && board[1][0] == '\u0000') {                board[1][0] = 'o';            } else if (input.equals(top right) && board[2][0] == '\u0000') {                board[2][0] = 'o';            } else if (input.equals(middle left) && board[0][1] == '\u0000') {                board[0][1] = 'o';            } else if (input.equals(middle middle) && board[1][1] == '\u0000') {                board[1][1] = 'o';            } else if (input.equals(middle right) && board[2][1] == '\u0000') {                board[2][1] = 'o';            } else if (input.equals(bottom left) && board[0][2] == '\u0000') {                board[0][2] = 'o';            } else if (input.equals(bottom middle) && board[1][2] == '\u0000') {                board[1][2] = 'o';            } else if (input.equals(bottom right) && board[2][2] == '\u0000') {                board[2][2] = 'o';            } else {                System.out.println(You have entered an invalid space                         + please try again.);                validinput = false;            }            if (validinput) {                turn--;                y++;            }            System.out.printf( %c | %c | %c \n, board[0][0], board[1][0], board[2][0]);            System.out.printf(____________\n);            System.out.printf( %c | %c | %c \n, board[0][1], board[1][1], board[2][1]);            System.out.printf(____________\n);            System.out.printf( %c | %c | %c \n, board[0][2], board[1][2], board[2][2]);            iswinning1=detection(iswinning1, board);             if (iswinning1 == true) {                System.out.println(Player 2 wins!);                System.exit(1);            }        }    }}
Simple Java Tic-Tac-Toe game
java;game;tic tac toe