Java通过Executors提供四种线程池，分别为：1、newCachedThreadPool创建一个可缓存线程池，如果线程池长度超过处理需求，可以灵活回收空闲线程，若无可回收则新建线程。2、newFixedThreadPool创建一个定长线程池，可以控制线程最大并发数，超过的线程会在队列中等待。3、newScheduledThreadPool创建一个定长线程池，支持定时及周期性任务执行。4、newSingleThreadExecutor创建一个单线程化的线程池，它只会用唯一的工作线程来执行任务，保证所有任务按照指定顺序执行。
1、newCachedThreadPool
ExecutorService cachedThreadPool = Executors.newCachedThreadPool();cachedThreadPool.execute(new Runnable() {@Overridepublic void run() {//do something}});
2、newFixedThreadPool
ExecutorService fixedThreadPool = Executors.newFixedThreadPool(3);fixedThreadPool.execute(new Runnable() {@Overridepublic void run() {//do something}});
3、newScheduledThreadPool
//延迟三秒执行ScheduledExecutorService scheduledThreadPool = Executors.newScheduledThreadPool(5);scheduledThreadPool.schedule(new Runnable() {@Overridepublic void run() {//do something}}, 3, TimeUnit.SECONDS);
//表示延迟1秒后每隔3秒钟执行一次scheduledThreadPool.scheduleAtFixedRate(new Runnable() {@Overridepublic void run() {//do something}}, 1, 3, TimeUnit.SECONDS);
4、newSingleThreadExecutor
ExecutorService singleThreadExecutor = Executors.newSingleThreadExecutor();singleThreadExecutor.execute(new Runnable() {@Overridepublic void run() {//do something}});
閱讀更多 西貝9527 的文章
