calculate pi in java
private static double calcPi(final int iterations){
double x;
double y;
int successCount = 0;
for (int i = 0; i <= iterations; i++){
x = Math.random();
y = Math.random();
if ((Math.pow(x, 2) + Math.pow(y, 2)) <= 1){
successCount++;
}
}
return (double) (4 * successCount) / iterations;
}