package?com.brackeen.javagamebook.util;
import?java.util.linkedList;

/**
????A?thread?pool?is?a?group?of?a?limited?number?of?threads?that
????are?used?to?execute?tasks.
*/
public?class?ThreadPool?extends?ThreadGroup?{

????private?boolean?isAlive;
????private?linkedList?taskQueue;
????private?int?threadID;
????private?static?int?threadPoolID;

????/**
????????Creates?a?new?ThreadPool.
????????@param?numThreads?The?number?of?threads?in?the?pool.
????*/
????public?ThreadPool（int?numThreads）?{
????????super（“ThreadPool-“?+?（threadPoolID++））;
????????setDaemon（true）;

????????isAlive?=?true;

????????taskQueue?=?new?linkedList（）;
????????for?（int?i=0;?i????????????new?PooledThread（）.start（）;
????????}
????}


????/**
????????Requests?a?new?t