java線程池創建與調用

public class ExcutorUtil {

    static ExecutorService fixedThreadPool = null;
    //線程池大小,可自己定義
    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);
    }
}

• 創建源碼爲:

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

•  參數解析

序號	名稱	類型	含義
1	corePoolSize	int	核心線程池大小
2	maximumPoolSize	int	最大線程池大小
3	keepAliveTime	long	線程最大空閒時間
4	unit	TimeUnit	時間單位
5	workQueue	BlockingQueue<Runnable>	線程等待隊列
6	threadFactory	ThreadFactory	線程創建工廠
7	handler	RejectedExecutionHandler	拒絕策略

 

• 以下代碼爲調用代碼

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