Groovy example source code file (random.java)

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Java - Groovy tags/keywords

ia, ia, ic, ic, im, im, n, n, numberformat, text

The Groovy random.java source code

// $Id: random.java,v 1.2 2004-08-14 08:19:19 bfulgham Exp $
// http://shootout.alioth.debian.org/
//
// Brent Fulgham:  Changed to use 32-bit integers (like the C
// version), based on a suggestion by Yonik Seeley.

import java.text.*;

public class random {

    public static final int IM = 139968;
    public static final int IA = 3877;
    public static final int IC = 29573;

    public static void main(String args[]) {
	int N = Integer.parseInt(args[0]) - 1;
	NumberFormat nf = NumberFormat.getInstance();
	nf.setMaximumFractionDigits(9);
	nf.setMinimumFractionDigits(9);
	nf.setGroupingUsed(false);

	while (N-- > 0) {
	    gen_random(100);
	}
	System.out.println(nf.format(gen_random(100)));
    }

    public static int last = 42;
    public static double gen_random(double max) {
	return( max * (last = (last * IA + IC) % IM) / IM );
    }
}