實現ThreadFactory，修改Thread的名稱

    static class SelfDefinedThreadFactory implements ThreadFactory {
        final AtomicInteger threadNumber = new AtomicInteger(1);
        final String namePrefix;

        SelfDefinedThreadFactory(String namePrefix) {
            this.namePrefix = namePrefix+"-";
        }

        public Thread newThread(Runnable r) {
            Thread t = new Thread( r,namePrefix + threadNumber.getAndIncrement());
            if (t.isDaemon())
                t.setDaemon(true);
            if (t.getPriority() != Thread.NORM_PRIORITY)
                t.setPriority(Thread.NORM_PRIORITY);
            return t;
        }
    }

默認的ThreadFactory是DefaultThreadFactory， 咱們能夠從新實現ThreadFactory接口，對Thread進行一些自定義的實現，好比線程的名稱或是線程的優先級。