package game;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;


/**
 * Created by d.nurgaleev on 24.10.2016.
 */
public class Field extends JPanel {
    public static final int width = 8;
    public static final int height = 8;
    public static final int scale = 40;
    private Game gamer;
    public static JFrame frame = new JFrame();

    public Field() {
        frame = frame1("2048");
        gamer = new Game();
        gamer.start();
        frame.addKeyListener(new KeyAdapter() {
            @Override
            public void keyPressed(KeyEvent e) {
                gamer.keyPressed(e);
                repaint();
            }
        });
    }

    public void paint(Graphics g) {

        g.setColor(color(230, 230, 230));
        g.fillRect(0, 0, width * scale, height * scale);
        g.setColor(color(100, 100, 100));
        for (int i = 0; i < width * scale; i = i + scale * 2) {
            g.drawLine(i, 0, i, height * scale);
            g.drawLine(0, i, width * scale, i);
        }
        g.setColor(color(0,0,0));
        Font myFont = new Font("Times New Roman", Font.BOLD, 20);
        g.setFont(myFont);
        int y = 0;
        for (int i = 0; i < 4; i++) {
            int x = 0;
            for (int j = 0; j < 4; j++) {
                if (Game.num[i][j] == 4)
                {
                    g.setColor(color(0,255,0));
                    g.fillRect(0,j*scale*2,scale*2,scale*2);
                }
                g.setColor(color(0,0,0));
                g.drawString("" + Game.num[i][j], scale - 5 + x, scale + 5 + y);
                x = x + scale * 2;
            }
            y = y + scale * 2;
        }
    }

    public Color color(int red, int green, int blue) {
        return new Color(red, green, blue);
    }


    public JFrame frame1(String s) {
        JFrame frame1 = new JFrame();
        frame1.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        frame1.setResizable(false);
        frame1.setSize(width * scale + 5, height * scale + 30);
        frame1.setLocationRelativeTo(null);
        frame1.add(this);
        frame1.setVisible(true);
        return frame1;
    }

    public static void main(String[] args) {
        Field field = new Field();


    }
 }






package game;

import javax.swing.*;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.util.Random;

/**
 * Created by d.nurgaleev on 24.10.2016.
 */
public class Game {
    public int random(int a, int b) {
        return a + (int) (Math.random() * b);
    }
    public static int[][] num = new int[4][4];
    public int def = 2;

    public void keyPressed(KeyEvent e) {
        if (e.getKeyCode() == KeyEvent.VK_DOWN) {
            down();
        }
        if (e.getKeyCode() == KeyEvent.VK_RIGHT) {
            right();
        }
        if (e.getKeyCode() == KeyEvent.VK_UP) {
            up();
        }
        if (e.getKeyCode() == KeyEvent.VK_LEFT) {
            left();
        }
    }

    public void start() {
        num[random(0,4)][random(0,4)] = def;
        num[random(0,4)][random(0,4)] = def;
        for(int i = 0; i < 4; i++)
        {
            for (int j = 0; j < 4; j++)
            {
                System.out.print(num[i][j] + " ");
            }
            System.out.println();
        }
    }

    public void down() {
        int zn = 0;
        System.out.println();
        for(int j = 0; j < 4; j++) {
            for (int i = 3; i >= 0; i--) {
                if(num[i][j] == 0) {
                    int k = i - 1;
                    while(k > 0)
                    {
                        if(num[k][j] != 0) break;
                        k--;
                    }
                    if(k >=0) {
                        num[i][j] = num[k][j];
                        num[k][j] = 0;
                    }
                }

                if(num[i][j] != 0)
            {
                    int k = i - 1;
                    while(k > 0)
                    {
                        if(num[k][j] != 0) break;
                        k--;
                    }
                if (k>=0 && num[i][j] == num[k][j]) {
                    num[i][j] = num[i][j] * 2;
                    num[k][j] = 0;
                }

            }

            }
        }

        System.out.println();
        int a = random(0,4);
        int b = random(0,4);
        while (num[a][b] != 0)
        {
            a = random(0,4);
            b = random(0,4);
        }
        num[a][b] = def;
        for(int i = 0; i < 4; i++)
        {
            for (int j = 0; j < 4; j++)
            {
                System.out.print(num[i][j] + " ");
            }
            System.out.println();
        }
    }

    public void right() {
        int zn = 0;
        System.out.println();
        for(int i = 0; i < 4; i++) {
            for (int j = 3; j >= 0; j--) {
                if(num[i][j] == 0) {
                    int k = j - 1;
                    while(k > 0)
                    {
                        if(num[i][k] != 0) break;
                        k--;
                    }
                    if(k >=0) {
                        num[i][j] = num[i][k];
                        num[i][k] = 0;
                    }
                }

                if(num[i][j] != 0)
                {
                    int k = j - 1;
                    while(k > 0)
                    {
                        if(num[i][k] != 0) break;
                        k--;
                    }
                    if (k>=0 && num[i][j] == num[i][k]) {
                        num[i][j] = num[i][j] * 2;
                        num[i][k] = 0;
                    }

                }

            }
        }


        int a = random(0,4);
        int b = random(0,4);
        while (num[a][b] != 0)
        {
            a = random(0,4);
            b = random(0,4);
        }
        num[a][b] = def;
        for(int i = 0; i < 4; i++)
        {
            for (int j = 0; j < 4; j++)
            {
                System.out.print(num[i][j] + " ");
            }
            System.out.println();
        }
    }

    public void up() {
        int zn = 0;
        System.out.println();
        for(int j = 0; j < 4; j++) {
            for (int i = 0; i < 4; i++) {
                if(num[i][j] == 0) {
                    int k = i + 1;
                    while(k < 4)
                    {
                        if(num[k][j] != 0) break;
                        k++;
                    }
                    if(k < 4) {
                        num[i][j] = num[k][j];
                        num[k][j] = 0;
                    }
                }

                if(num[i][j] != 0)
                {
                    int k = i + 1;
                    while(k < 4)
                    {
                        if(num[k][j] != 0) break;
                        k++;
                    }
                    if (k < 4 && num[i][j] == num[k][j]) {
                        num[i][j] = num[i][j] * 2;
                        num[k][j] = 0;
                    }

                }

            }
        }

        System.out.println();
        int a = random(0,4);
        int b = random(0,4);
        while (num[a][b] != 0)
        {
            a = random(0,4);
            b = random(0,4);
        }
        num[a][b] = def;
        for(int i = 0; i < 4; i++)
        {
            for (int j = 0; j < 4; j++)
            {
                System.out.print(num[i][j] + " ");
            }
            System.out.println();
        }
    }


    public void left() {
        int zn = 0;
        System.out.println();
        for(int i = 0; i < 4; i++) {
            for (int j = 0; j < 4; j++) {
                if(num[i][j] == 0) {
                    int k = j + 1;
                    while(k < 4)
                    {
                        if(num[i][k] != 0) break;
                        k++;
                    }
                    if(k < 4) {
                        num[i][j] = num[i][k];
                        num[i][k] = 0;
                    }
                }

                if(num[i][j] != 0)
                {
                    int k = j + 1;
                    while(k < 4)
                    {
                        if(num[i][k] != 0) break;
                        k++;
                    }
                    if (k < 4 && num[i][j] == num[i][k]) {
                        num[i][j] = num[i][j] * 2;
                        num[i][k] = 0;
                    }

                }

            }
        }


        int a = random(0,4);
        int b = random(0,4);
        while (num[a][b] != 0)
        {
            a = random(0,4);
            b = random(0,4);
        }
        num[a][b] = def;
        for(int i = 0; i < 4; i++)
        {
            for (int j = 0; j < 4; j++)
            {
                System.out.print(num[i][j] + " ");
            }
            System.out.println();
        }
    }
}