import java.util.concurrent.Executor;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class Start implements Runnable {
    protected int count = 0;

    @Override
    public void run() {
        while (count < 100) {
            count++;
            System.out.println(Thread.currentThread().getName() + " count:" + count);
        }
    }

    public static void main(String[] args) {
        Runnable runnable = new Start();
        ExecutorService executorService = Executors.newFixedThreadPool(10);
        for (int i = 0; i < 2; i++) {
            executorService.execute(runnable);
        }
        executorService.shutdown();
    }
}

第一次累加会重复，如果加锁就是顺序输出基本都是一个线程干活了，是不是我代码第一次读写的有问题。。。