# Atomic Simple Random : Random « Development Class « Java

Atomic Simple Random

```
/*
* @(#)\$Id: codetemplate_xbird.xml 943 2006-09-13 07:03:37Z yui \$
*
* Copyright (c) 2005-2006 Makoto YUI and Project XBird
*
* This file is part of XBird and is distributed under the terms of
* the Common Public License v1.0.
*
* Contributors:
*     Makoto YUI - initial implementation
*/
//package xbird.util.concurrent.lang;

import java.util.concurrent.atomic.AtomicLong;

/**
*
* <DIV lang="en"></DIV>
* <DIV lang="ja"></DIV>
*
* @author Makoto YUI (yuin405+xbird@gmail.com)
*/
public final class AtomicSimpleRandom {

private final static long multiplier = 0x5DEECE66DL;
private final static long addend = 0xBL;
private final static long mask = (1L << 48) - 1;

private static final AtomicLong seq = new AtomicLong(-715159705);
private long seed;

public AtomicSimpleRandom(long s) {
this.seed = s;
}

public AtomicSimpleRandom() {
}

public void setSeed(long s) {
seed = s;
}

public int nextInt() {
return next();
}

public int next() {
this.seed = nextseed;
return ((int) (nextseed >>> 17)) & 0x7FFFFFFF;
}

public int next(int bits) {
this.seed = nextseed;
return (int) (nextseed >>> (48 - bits));
}

}

```

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