import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class SnakeGame {
JFrame frame;
GamePanel panel;
JLabel label;
Snake s;
Food f;
long lasttime;
public SnakeGame() {
init();
while(true) {
calculate();
repaint();
}
}
private void repaint() {
label.repaint();
panel.repaint();
frame.repaint();
}
private void calculate() {
long before = System.currentTimeMillis();
int delta = (int) (System.currentTimeMillis() - lasttime);
s.step(delta);
lasttime = before;
if(f.isEaten(s)) {
s.addBody();
f.step();
}
}
private void init() {
s = new Snake(new Vector(50, 50));
f = new Food();
lasttime = System.currentTimeMillis();
frame = new JFrame();
frame.setBounds(0,0,1000,1000);
frame.setTitle("Snake");
frame.setVisible(true);
frame.setResizable(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setBackground(Color.BLACK);
frame.addComponentListener(new ComponentListener() {
@Override
public void componentShown(ComponentEvent e) {
// TODO Auto-generated method stub
}
@Override
public void componentResized(ComponentEvent e) {
label.setBounds(0, frame.getHeight()-65, 100, 20);
}
@Override
public void componentMoved(ComponentEvent e) {
// TODO Auto-generated method stub
}
@Override
public void componentHidden(ComponentEvent e) {
// TODO Auto-generated method stub
}
});
panel = new GamePanel();
panel.setBounds(0, 0, 1000, 1000);
panel.setVisible(true);
panel.setLayout(null);
label = new JLabel();
label.setBounds(0, frame.getHeight()-65, 250, 20);
label.setBackground(Color.GREEN);
label.setForeground(Color.WHITE);
label.setText("Running...");
label.setOpaque(false);
panel.add(label);
frame.add(panel);
frame.addKeyListener(s);
}
private class GamePanel extends JPanel {
public void paintComponent(Graphics g) {
f.display(g);
s.display(g);
}
}
}
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.ArrayList;
public class Snake implements KeyListener{
ArrayList<Vector> bodys;
Vector speed;
public Snake(Vector pos) {
bodys = new ArrayList<Vector>();
bodys.add(pos);
speed = new Vector(0.1,0);
}
public void display(Graphics g) {
g.setColor(Color.cyan);
for(int i = 0; i < bodys.size(); ++i) {
g.fillRect((int)Math.round(bodys.get(i).getX()), (int)Math.round(bodys.get(i).getY()), 20, 20);
}
}
public void step(int time) {
for(int i = 1; bodys.size()-i > 0; ++i ) {
Vector v = new Vector(bodys.get(bodys.size()-1-i).getX(), bodys.get(bodys.size()-1-i).getY());
bodys.set(bodys.size()-i, v);
}
double x = bodys.get(0).getX() + speed.getX()*time;
double y = bodys.get(0).getY() + speed.getY()*time;
Vector v = new Vector(x, y);
bodys.set(0, v);
}
@Override
public void keyPressed(KeyEvent e) {
int i = e.getKeyCode();
if(i == KeyEvent.VK_1) {
if(speed.getX() == 0) {
speed.setX(0.1);
speed.setY(0);
}
}
if(i == KeyEvent.VK_2) {
if(speed.getY() == 0) {
speed.setY(0.1);
speed.setX(0);
}
}
if(i == KeyEvent.VK_3) {
if(speed.getX() == 0) {
speed.setX(-0.1);
speed.setY(0);
}
}
if(i == KeyEvent.VK_4) {
if(speed.getY() == 0) {
speed.setY(-0.1);
speed.setX(0);
}
}
}
@Override
public void keyReleased(KeyEvent e) {
// TODO Auto-generated method stub
}
@Override
public void keyTyped(KeyEvent e) {
int i = e.getKeyCode();
if(i == KeyEvent.VK_1) {
if(speed.getX() == 0) {
speed.setX(0.1);
speed.setY(0);
}
}
if(i == KeyEvent.VK_2) {
if(speed.getY() == 0) {
speed.setY(0.1);
speed.setX(0);
}
}
if(i == KeyEvent.VK_3) {
if(speed.getX() == 0) {
speed.setX(-0.1);
speed.setY(0);
}
}
if(i == KeyEvent.VK_4) {
if(speed.getY() == 0) {
speed.setY(-0.1);
speed.setX(0);
}
}
}
public void addBody() {
Vector v = new Vector(bodys.get(bodys.size()-1).getX(), bodys.get(bodys.size()-1).getY());
bodys.add(v);
}
}
import java.awt.Color;
import java.awt.Graphics;
public class Food {
int x,y;
public Food() {
x = 20;
y = 300;
}
public void display(Graphics g) {
g.setColor(Color.GREEN);
g.fillOval(x, y, 20, 20);
}
public boolean isEaten(Snake s) {
if(this.x < s.bodys.get(0).x && this.x + 20 > s.bodys.get(0).x) {
if(this.y < s.bodys.get(0).y && this.y + 20 > s.bodys.get(0).y) {
return true;
}
}
if(this.x < s.bodys.get(0).x+20 && this.x + 20 > s.bodys.get(0).x+20) {
if(this.y < s.bodys.get(0).y+20 && this.y + 20 > s.bodys.get(0).y+20) {
return true;
}
}
return false;
}
public void step() {
x = (int) Math.round(500*Math.random());
y = (int) Math.round(500*Math.random());
}
}
public class Vector {
double x,y;
public Vector(double x, double y) {
this.x = x;
this.y = y;
}
public void setX(double x) {
this.x = x;
}
public void setY(double y) {
this.y = y;
}
public double getX() {
// TODO Auto-generated method stub
return x;
}
public double getY() {
// TODO Auto-generated method stub
return y;
}
public void setLocation(double x, double y) {
this.x = x;
this.y = y;
}
public void rotate(double angle) {
double rx = (this.x * Math.cos(angle)) - (this.y * Math.sin(angle));
double ry = (this.x * Math.sin(angle)) + (this.y * Math.cos(angle));
x = rx;
y = ry;
}
public void add(Vector v) {
y = this.y + v.getY();
x = this.x + v.getX();
}
public void sub(Vector v) {
y = this.y - v.getY();
x = this.x - v.getX();
}
public void multiply(double d) {
x = x*d;
y = y*d;
}
public void div(double d) {
x = x/d;
y = y/d;
}
public double mag() {
return Math.pow((x*x + y*y), 0.5);
}
public void normalize() {
double m = mag();
div(m);
}
}
public class Vector {
double x,y;
public Vector(double x, double y) {
this.x = x;
this.y = y;
}
public void setX(double x) {
this.x = x;
}
public void setY(double y) {
this.y = y;
}
public double getX() {
// TODO Auto-generated method stub
return x;
}
public double getY() {
// TODO Auto-generated method stub
return y;
}
public void setLocation(double x, double y) {
this.x = x;
this.y = y;
}
public void rotate(double angle) {
double rx = (this.x * Math.cos(angle)) - (this.y * Math.sin(angle));
double ry = (this.x * Math.sin(angle)) + (this.y * Math.cos(angle));
x = rx;
y = ry;
}
public void add(Vector v) {
y = this.y + v.getY();
x = this.x + v.getX();
}
public void sub(Vector v) {
y = this.y - v.getY();
x = this.x - v.getX();
}
public void multiply(double d) {
x = x*d;
y = y*d;
}
public void div(double d) {
x = x/d;
y = y/d;
}
public double mag() {
return Math.pow((x*x + y*y), 0.5);
}
public void normalize() {
double m = mag();
div(m);
}
}
public class Game {
public static void main(String[] args) {
new SnakeGame();
}
}
