并发线程两种简单常用实例

第一种方案：简单、常用

//newFixedThreadPool(20)创建可用线程数
ExecutorService executorServices = Executors.newFixedThreadPool(20);
System.out.println(" START ......");
for (int i = 0; i < 10; i ++) {
    executorServices.submit(new Runnable() {
        public void run() {
            //逻辑内容
        }
    });
}
// 工作已经安排下去了，安心等待就好了
try {
    Thread.sleep(1000);
} catch (InterruptedException e) {
    e.printStackTrace();
} executorService.shutdownNow();
System.out.println(" END ......");

第二种方案：简单、清晰

//实例化一个Callable集合,add需要并发的方法
//newFixedThreadPool(20)创建可用线程数
ExecutorService executorService = Executors.newFixedThreadPool(20);
Set<Callable<String>> callables = new HashSet<Callable<String>>();

callables.add(new Callable<String>() {
    @Override
    public String call() throws Exception {
        return "Task1....";
    }
});

callables.add(new Callable<String>() {
    @Override
    public String call() throws Exception {
        return "Task2....";
    }
});
//执行全部
executorService.invokeAll(callables);

//执行单个
String result = executorService.invokeAny(callables);
System.out.println("result = " + result);

executorService.shutdownNow();