用java做了个控制台版的2048

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玩几局2048，理解下程序执行过程，代码挺简单

但是创造2048这个游戏的人很牛。import java.util.Random;import java.util.Scanner;public class game2048 {static Random random = new Random();static Scanner scanner = new Scanner(System.in);private static boolean isNotFull(int[][] board) {for (int[] ia : board)for (int i : ia)if (i == 0)return true;return false;}private static void generate(int[][] board) {assert isNotFull(board);while (true) {int number = random.nextInt(16);int row = number / 4;int col = number % 4;if (board[row][col] == 0) {board[row][col] = System.currentTimeMillis() % 2 == 0 ? 2 : 4;break;}}}static int[][] init() {int[][] numArray = new int[4][4];generate(numArray);generate(numArray);return numArray;}static void showBoard(int[][] board) {for (int[] numArray : board) {for (int i : numArray) {if (i == 0) {System.out.printf("%4s", ".");} else {System.out.printf("%4s", i);}}System.out.println();}}static char acceptInput() {while (true) {System.out.print("Input>");String line = scanner.nextLine();char direction = line.charAt(0);if ("WASD".indexOf(direction) != -1)return direction;}}/*static char getInput() {System.out.print("Input>");Scanner scanner = new Scanner(System.in);String input = scanner.nextLine();return input.charAt(0);}*/static void downBlock(int[][] numArray) {for (int i = 0; i < 4; i++) {for (int k = 0; k < 3; k++) {for (int j = 3; j > 0; j--) {if (numArray[j][i] == 0) {numArray[j][i] = numArray[j - 1][i];numArray[j - 1][i] = 0;}}for (int j = 3; j > 0; j--) {if (numArray[j][i] == numArray[j - 1][i]) {numArray[j][i] = 2 * numArray[j][i];numArray[j - 1][i] = 0;}}}}generate(numArray);}static void upBlock(int[][] numArray) {for (int i = 0; i < 4; i++) {for (int k = 0; k < 3; k++) {for (int j = 0; j <3 ; j++) {if (numArray[j][i] == 0) {numArray[j][i] = numArray[j + 1][i];numArray[j +1][i] = 0;}}for (int j = 0; j < 3; j++) {if (numArray[j][i] == numArray[j + 1][i]) {numArray[j][i] = 2 * numArray[j][i];numArray[j + 1][i] = 0;}}}}generate(numArray);}static void leftBlock(int[][] numArray) {for (int i = 0; i < 4; i++) {for (int k = 0; k < 3; k++) {for (int j = 0; j <3 ; j++) {if (numArray[i][j] == 0) {numArray[i][j] = numArray[i][j+1]; numArray[i][j+1] = 0;}}for (int j = 0; j < 3; j++) {if (numArray[i][j] == numArray[i][j+1]) {numArray[i][j] = 2 * numArray[i][j];numArray[i][j+1] = 0;}}}}generate(numArray);}static void rightBlock(int[][] numArray) {for (int i = 0; i < 4; i++) {for (int k = 0; k < 3; k++) {for (int j = 3; j > 0; j--) {if (numArray[i][j] == 0) {numArray[i][j] = numArray[i][j-1]; numArray[i][j-1] = 0;}}for (int j = 3; j > 0; j--) {if (numArray[i][j] == numArray[i][j-1]) {numArray[i][j] = 2 * numArray[i][j];numArray[i][j-1] = 0;}}}}generate(numArray);}static void process(int[][] board, char direction) {switch (direction) {case 'W':upBlock(board);break;case 'A':leftBlock(board);break;case 'S':downBlock(board);break;case 'D':rightBlock(board);break;}}public static void main(String[] args) {int[][] board = init();while (true) {showBoard(board);char direction = acceptInput();process(board, direction);}}}

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