89 lines
2.7 KiB
Java
89 lines
2.7 KiB
Java
import java.awt.*;
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import java.awt.event.*;
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import javax.swing.*;
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import java.awt.image.*;
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import java.util.*;
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public class GameOfLife extends JFrame implements Runnable, MouseListener {
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private static final Dimension WindowSize = new Dimension(800, 800);
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private BufferStrategy strategy;
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private static boolean isGraphicsInitialised = false;
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private boolean gameState[][] = new boolean[40][40];
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public GameOfLife() {
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setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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// display the window. centred on the screen
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Dimension screensize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
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int x = screensize.width/2 - WindowSize.width/2; int y = screensize.height/2 - WindowSize.height/2;
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setBounds(x, y, WindowSize.width, WindowSize.height);
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setVisible(true);
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createBufferStrategy(2);
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strategy = getBufferStrategy();
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// create a new thread & start it
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Thread t = new Thread(this);
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t.start();
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// adding mouse listener
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addMouseListener(this);
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isGraphicsInitialised = true;
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}
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// entry point of the application
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public static void main(String[] args) {
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GameOfLife game = new GameOfLife();
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}
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public void run() {
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while (true) {
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// repainting
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try {
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this.repaint();
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Thread.sleep(20);
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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}
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}
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// application's paint method
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public void paint(Graphics g) {
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// making sure that the graphics are initialised before painting
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if (isGraphicsInitialised) {
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g = strategy.getDrawGraphics();
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// draw a white rectangle on the whole canvas
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g.setColor(Color.WHITE);
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g.fillRect(0, 0, 800, 800);
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// looping through the gameState array
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for (int i = 0; i < 40; i++) {
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for (int j = 0; j < 40; j++) {
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// drawing a black square if true
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if (gameState[i][j]) {
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g.setColor(Color.BLACK);
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g.fillRect(i * 20, j * 20, 20, 20);
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}
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}
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}
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strategy.show();
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}
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}
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public void mousePressed(MouseEvent e) { }
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public void mouseReleased(MouseEvent e) { }
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public void mouseEntered(MouseEvent e) { }
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public void mouseExited(MouseEvent e) { }
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// mouse click event
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public void mouseClicked(MouseEvent e) {
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// setting boolean corresponding to the square that was clicked to true
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gameState[(int) Math.floor(e.getX() / 20)][(int) Math.floor(e.getY() / 20)] = true;
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}
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}
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