package snake;
import java.awt.Dimension;
import java.awt.Point;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.ArrayList;
import java.util.Random;
import javax.swing.JFrame;
import javax.swing.Timer;
public class Snake implements ActionListener, KeyListener
{
public static Snake snake;
public JFrame jframe;
public RenderPanel renderPanel;
public Timer timer = new Timer(20, this);
public ArrayList<Point> snakeParts = new ArrayList<Point>();
public static final int UP = 0, DOWN = 1, LEFT = 2, RIGHT = 3, SCALE = 10;
public int ticks = 0, direction = DOWN, score, tailLength = 10, time;
public Point head, cherry;
public Random random;
public boolean over = false, paused;
public Dimension dim;
public Snake()
{
dim = Toolkit.getDefaultToolkit().getScreenSize();
jframe = new JFrame("Snake");
jframe.setVisible(true);
jframe.setSize(805, 700);
jframe.setResizable(false);
jframe.setLocation(dim.width / 2 - jframe.getWidth() / 2, dim.height / 2 - jframe.getHeight() / 2);
jframe.add(renderPanel = new RenderPanel());
jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jframe.addKeyListener(this);
startGame();
}
public void startGame()
{
over = false;
paused = false;
time = 0;
score = 0;
tailLength = 14;
ticks = 0;
direction = DOWN;
head = new Point(0, -1);
random = new Random();
snakeParts.clear();
cherry = new Point(random.nextInt(79), random.nextInt(66));
timer.start();
}
@Override
public void actionPerformed(ActionEvent arg0)
{
renderPanel.repaint();
ticks++;
if (ticks % 2 == 0 && head != null && !over && !paused)
{
time++;
snakeParts.add(new Point(head.x, head.y));
if (direction == UP)
{
if (head.y - 1 >= 0 && noTailAt(head.x, head.y - 1))
{
head = new Point(head.x, head.y - 1);
}
else
{
over = true;
}
}
if (direction == DOWN)
{
if (head.y + 1 < 67 && noTailAt(head.x, head.y + 1))
{
head = new Point(head.x, head.y + 1);
}
else
{
over = true;
}
}
if (direction == LEFT)
{
if (head.x - 1 >= 0 && noTailAt(head.x - 1, head.y))
{
head = new Point(head.x - 1, head.y);
}
else
{
over = true;
}
}
if (direction == RIGHT)
{
if (head.x + 1 < 80 && noTailAt(head.x + 1, head.y))
{
head = new Point(head.x + 1, head.y);
}
else
{
over = true;
}
}
if (snakeParts.size() > tailLength)
{
snakeParts.remove(0);
}
if (cherry != null)
{
if (head.equals(cherry))
{
score += 10;
tailLength++;
cherry.setLocation(random.nextInt(79), random.nextInt(66));
}
}
}
}
public boolean noTailAt(int x, int y)
{
for (Point point : snakeParts)
{
if (point.equals(new Point(x, y)))
{
return false;
}
}
return true;
}
public static void main(String[] args)
{
snake = new Snake();
}
@Override
public void keyPressed(KeyEvent e)
{
int i = e.getKeyCode();
if ((i == KeyEvent.VK_A || i == KeyEvent.VK_LEFT) && direction != RIGHT)
{
direction = LEFT;
}
if ((i == KeyEvent.VK_D || i == KeyEvent.VK_RIGHT) && direction != LEFT)
{
direction = RIGHT;
}
if ((i == KeyEvent.VK_W || i == KeyEvent.VK_UP) && direction != DOWN)
{
direction = UP;
}
if ((i == KeyEvent.VK_S || i == KeyEvent.VK_DOWN) && direction != UP)
{
direction = DOWN;
}
if (i == KeyEvent.VK_SPACE)
{
if (over)
{
startGame();
}
else
{
paused = !paused;
}
}
}
@Override
public void keyReleased(KeyEvent e)
{
}
@Override
public void keyTyped(KeyEvent e)
{
}
}
