code: public class MC {
  	public static void main(String[] args) {
  		System.out.println(getPi(10000));
  		System.out.println(getPi(100000));
  		System.out.println(getPi(1000000));
  		System.out.println(getPi(10000000));
  		System.out.println(getPi(100000000));
  		
  	}
  	public static double getPi(int numThrows){
  		int inCircle= 0;
  		for(int i= 0;i < numThrows;i++){
  			//a square with a side of length 2 centered at 0 has
  			//x and y range of -1 to 1
  			double randX= (Math.random() * 2) - 1;//range -1 to 1
  			double randY= (Math.random() * 2) - 1;//range -1 to 1
  			//distance from (0,0) = sqrt((x-0)^2+(y-0)^2)
  			double dist= Math.sqrt(randX * randX + randY * randY);
  			//^ or in Java 1.5+: double dist= Math.hypot(randX, randY);
  			if(dist < 1){//circle with diameter of 2 has radius of 1
  				inCircle++;
  			}
  		}
  		return 4.0 * inCircle / numThrows;
  	}
  }
  