pal.math
Class UrnModel

java.lang.Object
  pal.math.UrnModel

All Implemented Interfaces:

java.io.Serializable

public class UrnModel
extends java.lang.Object
implements java.io.Serializable

class for drawing numbers from an urn with and without laying back

Version:

$Id: UrnModel.java,v 1.4 2001/07/13 14:39:13 korbinian Exp $

Author:

Korbinian Strimmer

See Also:

Serialized Form

Constructor Summary

UrnModel(int n)
create urn model

Method Summary

int	drawDontPutBack() draw a number without putting back
int	drawPutBack() draws a number with putting back
void	reset() refill urn

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

UrnModel

public UrnModel(int n)

create urn model

Parameters:

n - capacity (corresponding to numbers 0..n-1)

Method Detail

drawDontPutBack

public int drawDontPutBack()

draw a number without putting back

Returns:

number drawn (random integer between 0..n-1, if empty return -1)

reset

public void reset()

refill urn

drawPutBack

public int drawPutBack()

draws a number with putting back

Returns:

number drawn (random integer between 0..n-1, if empty return -1)