//
//  RandomRange.java
//  Anneal
//  Adds the nextInt( int n ) method
//  	in case we're in Java <= 1.1 which doesn't have it.
//
//  Created by sw on Sun Sep 15 2002.
//  Copyright (c) 2001 __MyCompanyName__. All rights reserved.
//

package net.tiac.home.sw.anneal;

import java.util.Random;

public class RandomRange extends java.util.Random {
    public RandomRange( ) {
        super();
    }
        
    public RandomRange( long seed ) {
        super( seed );
    }

    // This is copied straight from Sun's description of the method:

    public int nextInt(int n) {
        if (n<=0)
            throw new IllegalArgumentException("n must be positive");
    
        if ((n & -n) == n)  // i.e., n is a power of 2
            return (int)((n * (long)next(31)) >> 31);
    
        int bits, val;
        do {
            bits = next(31);
            val = bits % n;
        } while(bits - val + (n-1) < 0);
        return val;
    }

}