I was bored today with John and we thought we’d make a ball move on the screen. After 10 minutes we decided to do a Monte Carlo simulation with the ball to get a cool drawing. Forty minutes later, here is what we came up with, it kind of looks like a dog or a cow’s head 
Here is the code that produced this:
package us.matthouse.circle;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Random;
import javax.swing.JFrame;
import javax.swing.Timer;
public class Circle extends JFrame implements ActionListener{
Timer t;
int x = 300;
int y = 300;
int z[][] = new int[600][600];
public Circle(){
setDefaultCloseOperation(EXIT_ON_CLOSE);
setSize(600, 600);
this.setLocation(50, 50);
setVisible(true);
for(int i=0; i<600; i++){
for(int j=0; j<600; j++){
z[i][j] = 0;
}
}
t = new Timer(10, this);
t.start();
}
public void paint(Graphics g){
g.setColor(Color.white);
g.fillRect(0, 0, 600, 600);
g.setColor(Color.black);
for(int i=0; i<600; i++){
for(int j=0; j<600; j++){
if(z[i][j] == 1){
g.fillRect(i, j, 1, 1);
}
}
}
g.setColor(Color.green);
g.fillOval(x, y, 5, 5);
}
public static void main(String[] args){
new Circle();
}
public void actionPerformed(ActionEvent e){
Random r = new Random();
int k = r.nextInt(3) - 1;
x = x + k;
k = r.nextInt(3) - 1;
y = y + k;
z[x][y] = 1;
if (y < 50){
y++;
}else if(x < 50){
x++;
}else if(x > 550){
x--;
}else if(y > 550){
y--;
}
repaint();
}
}
Tags: Circle, java, John Ciacia, Monte Carlo, Programming
Posted in Programming