keygenerator.java

java与模式 一书的源码

package com.javapatterns.keygen.ver3;

public class KeyGenerator
{

    private static KeyGenerator keygen =
        new KeyGenerator();

    private static final int POOL_SIZE = 20;

    private KeyInfo key ;

    private KeyGenerator()
    {
        key = new KeyInfo(POOL_SIZE);
    }

    public static KeyGenerator getInstance()
    {
        return keygen;
    }

    public int getNextKey()
    {
        return key.getNextKey();
    }
}