Question

Can i write sin(whatever) in Java and have it work?

public static void main(String[] args) {
    try {
        double check = Double.parseDouble(args[0]);
    } catch (NumberFormatException e) {
        System.exit(0);
    }
    sin(args[0]);
}

Answer 1

If you are running anything below Java 1.5, no. If you aren’t, you can, using static imports; you can write import static java.lang.Math.*; and then sin(whatever); and this is OK. Be aware of the warning from Sun, though:

Q: So when should you use static imports?

A: Very Sparingly!

If you happen to be running something below Java 1.5, you can still write sin(whatever), but this method must be present…

public static double sin(double x) { Math.sin(x); }