[java] Snake Game - lickin_lollipops

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copy download embed printName: Snake Game - lickin_lollipops

import java.awt.*;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.ArrayList;
import java.util.concurrent.TimeUnit;
import java.util.Random;
import javax.swing.*;
@SuppressWarnings("serial")
public class Snake extends JPanel {
private static int updateRate = 200; //in milliseconds, = 0.25 (250) seconds of sleep
//snake
private static final int RADIUS = 7;
private ArrayList<Integer> snakeBodyX = new ArrayList<Integer>();
private ArrayList<Integer> snakeBodyY = new ArrayList<Integer>();
private ArrayList<Integer> oldSnakeBodyX = new ArrayList<Integer>();
private ArrayList<Integer> oldSnakeBodyY = new ArrayList<Integer>();
private int speed = RADIUS * 2;
private int speedX = 0;
private int speedY = 0;
//fruit
private static final int FRUIT_RADIUS = RADIUS;
private Random fruitCoordinates = new Random();
private int fruitX[] = new int[2]; //{fruit 1, fruit 2}
private int fruitY[] = new int[2]; //{fruit 1, fruit 2}
private boolean firstRun = true;
private boolean end = false;
JTextArea inputText; //for arrow key movement
int arrowKeyPressed; //1 = up, 2 = down, 3 = left, 4 = right
//BOX SIZE
//(0,0) is in the top left corner, goes positive as it goes right and down
private static final int BOX_WIDTH = (RADIUS * 2) * 32;
private static final int BOX_HEIGHT = (RADIUS * 2) * 32;
//high score
private int fruitEaten = 0;
public Snake() {
setPreferredSize(new Dimension(BOX_WIDTH, BOX_HEIGHT));
inputText = new JTextArea();
add(inputText, BorderLayout.NORTH);
//Original SNAKE SIZE
snakeBodyX.add((BOX_WIDTH / 2));
snakeBodyY.add(BOX_HEIGHT / 2);
Thread gameThread = new Thread() {
public void run() {
while (true) {
//program ends
if(end) {
repaint();
break;
} //program ends when the snake hits the wall
else if(snakeBodyX.get(0) >= (BOX_WIDTH - (RADIUS * 2)) || (snakeBodyX.get(0) <= 0)) { //head hits the right side or left side (in that order)
end = true;
repaint();
break;
} else if(snakeBodyY.get(0) >= (BOX_HEIGHT - (RADIUS * 2)) || (snakeBodyY.get(0) <= 0)) { //head hits the bottom or top (in that order)
end = true;
repaint();
break;
}
//SNAKE STUFF
//arrow key movement
inputText.addKeyListener(new KeyListener() {
public void keyPressed(KeyEvent e) {
int i = e.getKeyCode();
switch(i) {
case KeyEvent.VK_UP:
if(snakeBodyX.size() > 1 && arrowKeyPressed == 2) {
break;
}
arrowKeyPressed = 1;
break;
case KeyEvent.VK_DOWN:
if(snakeBodyX.size() > 1 && arrowKeyPressed == 1) {
break;
}
arrowKeyPressed = 2;
break;
case KeyEvent.VK_LEFT:
if(snakeBodyX.size() > 1 && arrowKeyPressed == 4) {
break;
}
arrowKeyPressed = 3;
break;
case KeyEvent.VK_RIGHT:
if(snakeBodyX.size() > 1 && arrowKeyPressed == 3) {
break;
}
arrowKeyPressed = 4;
break;
}
}
@Override
public void keyReleased(KeyEvent e) {
}
@Override
public void keyTyped(KeyEvent e) {
}
});
//change speed based on arrow keys pressed
switch(arrowKeyPressed) {
case 1: //up
speedX = 0; //resets speed in the X direction
speedY = 0 - speed;
break;
case 2: //down
speedX = 0; //resets speed in the X direction
speedY = speed;
break;
case 3: //left
speedY = 0; //resets speed in the Y direction
speedX = 0 - speed;
break;
case 4: //right
speedY = 0; //resets speed in the Y direction
speedX = speed;
break;
}
oldSnakeBodyX.clear(); // empty the arraylist
oldSnakeBodyY.clear(); //empty the arraylist
//copy current snake body onto old snake body
for(int pixel = 0; pixel < snakeBodyX.size(); pixel++) {
oldSnakeBodyX.add(snakeBodyX.get(pixel).intValue()); //get the int value of the Integers so that they refer to different objects
oldSnakeBodyY.add(snakeBodyY.get(pixel).intValue());
}
//move the snake
snakeBodyX.add(0, snakeBodyX.get(0) + speedX); //inserts a new head value in the arraylist
snakeBodyX.remove(snakeBodyX.size() - 1); //deletes the last head value
snakeBodyY.add(0, snakeBodyY.get(0) + speedY); //inserts a new head value in the arraylist
snakeBodyY.remove(snakeBodyY.size() - 1); //deletes the last head value
//if head hits other part of snake
//have to type cast the objects in the arraylist as ints because even if two objects have the same value, they are not ==
if(speedX != 0 || speedY != 0) {
for(int bodyLocation = 0; bodyLocation < snakeBodyX.size(); bodyLocation++) {
if(((int)snakeBodyX.get(0) == (int)oldSnakeBodyX.get(bodyLocation)) && ((int)snakeBodyY.get(0) == (int)oldSnakeBodyY.get(bodyLocation))) {
end = true;
}
}
}
//FRUIT STUFF
//spawn the first fruits
if(firstRun) {
fruitX[0] = ((fruitCoordinates.nextInt(30) + 1) * (RADIUS * 2)); //EXPLANATION: The Box Height divided by 30 is 32. I want the random number to go from 1 to 30 and then multiply it by 30
fruitY[0] = ((fruitCoordinates.nextInt(30) + 1) * (RADIUS * 2)); //to make sure that the head will be able to be in that location. If the random number went up to 32
//then the fruit would go off the board, since the top left corner of the fruit is its coordinates.
//I also do not want the fruit on the edge because it's basically impossible to get the fruits on the edge
do {
fruitX[1] = ((fruitCoordinates.nextInt(30) + 1) * (RADIUS * 2));
fruitY[1] = ((fruitCoordinates.nextInt(30) + 1) * (RADIUS * 2));
} while((fruitX[0] == fruitX[1]) && (fruitY[0] == fruitY[1]));
firstRun = false;
}
//if fruit is eaten
if((snakeBodyX.get(0) == fruitX[0] && snakeBodyY.get(0) == fruitY[0]) || (snakeBodyX.get(0) == fruitX[1] && snakeBodyY.get(0) == fruitY[1])) { //(if the head is at the same coordinates as fruit 1) OR (if the head is at the same coordinates as fruit 2)
//expand snake
snakeBodyX.add(snakeBodyX.get(snakeBodyX.size() - 1));
snakeBodyY.add(snakeBodyY.get(snakeBodyY.size() - 1));
//increase score
fruitEaten++;
//increase speed
if(fruitEaten % 5 == 0) {
updateRate -= 15;
}
//replace that fruit
//fruit 1
if((snakeBodyX.get(0) == fruitX[0] && snakeBodyY.get(0) == fruitY[0])) { //if fruit 1 is eaten
do {
fruitX[0] = ((fruitCoordinates.nextInt(30) + 1) * (RADIUS * 2));
fruitY[0] = ((fruitCoordinates.nextInt(30) + 1) * (RADIUS * 2));
} while((fruitX[0] == fruitX[1] && fruitY[0] == fruitY[1])); //replaces if the new fruit is at the same location as the other one
}
//fruit 2
if((snakeBodyX.get(0) == fruitX[1] && snakeBodyY.get(0) == fruitY[1])) { //if fruit 2 is eaten
do {
fruitX[1] = ((fruitCoordinates.nextInt(30) + 1) * (RADIUS * 2));
fruitY[1] = ((fruitCoordinates.nextInt(30) + 1) * (RADIUS * 2));
} while((fruitX[0] == fruitX[1] && fruitY[0] == fruitY[1])); //replaces if the new fruit is at the same location as the other one
}
}
//redraw
repaint();
//update
try {
TimeUnit.MILLISECONDS.sleep(updateRate);
} catch (InterruptedException ex) { }
}
}
};
gameThread.start();
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
g.setColor(Color.WHITE);
g.fillRect(0, 0, BOX_WIDTH, BOX_HEIGHT);
//make border
g.setColor(Color.RED);
g.drawRect(0, 0, BOX_WIDTH, BOX_HEIGHT);
//draw fruit
g.setColor(Color.BLUE);
for(int i = 0; i < 2; i++) {
g.fillOval(fruitX[i], fruitY[i], (FRUIT_RADIUS * 2), (FRUIT_RADIUS * 2));
}
//draw snake with a green body
g.setColor(Color.GREEN);
for(int pixel = snakeBodyX.size() - 1; pixel >= 0; pixel--) {
if(pixel == 0) {
g.setColor(Color.RED); //changes the head of the snake to red
}
g.fillRect(snakeBodyX.get(pixel), snakeBodyY.get(pixel), (RADIUS * 2), (RADIUS * 2));
}
//display score
g.setColor(Color.BLACK);
g.setFont(new Font("Consolas", Font.PLAIN, 12));
String score = "Score: " + fruitEaten;
g.drawString(score, 5, 20);
//when head hits wall
if(end == true) {
//pause
try {
TimeUnit.MILLISECONDS.sleep(updateRate * 2);
} catch (InterruptedException ex) { }
//reset screen
g.setColor(Color.WHITE);
g.fillRect(0, 0, BOX_WIDTH, BOX_HEIGHT);
//displays "GAME OVER"
g.setColor(Color.RED); //font color
g.setFont(new Font("Consolas", Font.PLAIN, (RADIUS * 11))); //font size
final String GAME_OVER = "GAME OVER";
g.drawString(GAME_OVER, 30, (BOX_HEIGHT / 2));
}
}
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setContentPane(new Snake());
frame.pack();
frame.setVisible(true);
}
});
}
}

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Snake Game - lickin_lollipops
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09 Dec-2019
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