Java多线程操作集合的小问题

Answer 1

ExecutorService exec = Executors.newFixedThreadPool(8);
for(final Object obj : list){
    exec.execute(new Runnable() {
        @Override
        public void run() {
            process(obj)
        }
    });
}

I think this method is better.

Answer 2

java8 parallel stream

Answer 3

The member variable index is a multi-thread shared variable. You need to add volatile to ensure the visibility of this variable in multi-threads. The declaration code is changed to the following:

private volatile int index = 0;

Specifically why please learn the basic knowledge related to java concurrent programming

Answer 4

It’s best to use thread synchronization in your run()