samer@0: /*
samer@0:  *	Copyright (c) 2000, Samer Abdallah, King's College London.
samer@0:  *	All rights reserved.
samer@0:  *
samer@0:  *	This software is provided AS iS and WITHOUT ANY WARRANTY; 
samer@0:  *	without even the implied warranty of MERCHANTABILITY or 
samer@0:  *	FITNESS FOR A PARTICULAR PURPOSE.
samer@0:  */
samer@0: 
samer@0: package samer.maths.random;
samer@0: 
samer@0: public class Exponential extends BaseRandom
samer@0: {
samer@0: 	public double next()
samer@0: 	{ 
samer@0: 		double x;
samer@0: 		do { x=rnd.nextDouble(); } while (x==0.0);
samer@0: 		return -Math.log(x); 
samer@0: 	}
samer@0: 	public String toString() { return "Exponential"; }
samer@0: }