import java.util.Random;
public class Main {
public static void main(String[] argv) throws Exception {
Random rand = new Random();
boolean b = rand.nextBoolean();
long l = rand.nextLong();
float f = rand.nextFloat(); // 0.0 <= f < 1.0
double d = rand.nextDouble(); // 0.0 <= d < 1.0
}
}