java线程池创建与调用

public class ExcutorUtil {

    static ExecutorService fixedThreadPool = null;
    //线程池大小,可自己定义
    static final Integer nThreads = 100;

    static {
        if (fixedThreadPool == null) {
            fixedThreadPool = new ThreadPoolExecutor(nThreads, nThreads,
                    0L, TimeUnit.MILLISECONDS,
                    new LinkedBlockingQueue<Runnable>());
        }
    }

    public static void execute(Thread thread) {
        fixedThreadPool.execute(thread);
    }

    public static Future<?> submit(Callable<?> c) {
        return (Future<?>) fixedThreadPool.submit(c);
    }

    public static void execute(Runnable runnable) {
        fixedThreadPool.execute(runnable);
    }
}

• 创建源码为:

 public ThreadPoolExecutor(int corePoolSize,
                              int maximumPoolSize,
                              long keepAliveTime,
                              TimeUnit unit,
                              BlockingQueue<Runnable> workQueue) {
        this(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue,
             Executors.defaultThreadFactory(), defaultHandler);
    }

•  参数解析

序号	名称	类型	含义
1	corePoolSize	int	核心线程池大小
2	maximumPoolSize	int	最大线程池大小
3	keepAliveTime	long	线程最大空闲时间
4	unit	TimeUnit	时间单位
5	workQueue	BlockingQueue<Runnable>	线程等待队列
6	threadFactory	ThreadFactory	线程创建工厂
7	handler	RejectedExecutionHandler	拒绝策略

 

• 以下代码为调用代码

     ExcutorUtil.execute(()->{
            //do something
       });