http://cuisuqiang.iteye.com/blog/2019372

http://www.cnblogs.com/riskyer/p/3263032.html

http://blog.csdn.net/mazhimazh/article/details/19243889

Java通過Executors提供四種執行緒池，newCacheThreadPool()，newFixedThreadPool(),newScheduedThreadPool(),newSingleThreadPool()

<span style="font-family:KaiTi_GB2312;font-size:12px;">public class Main {
	public static void main( String[] args ) {

		ExecutorService executors = Executors.newCachedThreadPool();
		SleepTread mSleepTread;
		for ( int i = 0 ; i < 30 ; i++ ) {
			mSleepTread = new SleepTread();
			executors.execute(mSleepTread);
		}
		executors.shutdown();
	}

	static class SleepTread extends Thread {
		@Override
		public void run() {
			super.run();
			try {
				Thread.sleep(1500);
			} catch ( InterruptedException e ) {
				e.printStackTrace();
			}
			System.out.println(this.getName() + " ----- ");
		}
	}

}</span>
 

newFixedThreadPool

<span style="font-family:KaiTi_GB2312;font-size:12px;">public static void main( String[] args ) {

		ExecutorService executors = Executors.newFixedThreadPool(3);
		SleepTread mSleepTread;
		for ( int i = 0 ; i < 30 ; i++ ) {
			mSleepTread = new SleepTread();
			executors.execute(mSleepTread);
		}
		executors.shutdown();
	}</span>

這個執行緒固定長度,

newScheduledThreadPool

<span style="font-family:KaiTi_GB2312;font-size:12px;">	public static void main( String[] args ) {

		ScheduledExecutorService executors = Executors.newScheduledThreadPool(5);
		SleepTread mSleepTread;
		for ( int i = 0 ; i < 30 ; i++ ) {
			mSleepTread = new SleepTread();
//			executors.execute(mSleepTread);
											//延遲多上時間執行,時間單位
			executors.schedule(mSleepTread, 3, TimeUnit.SECONDS);
		}
		executors.shutdown();
	}</span>

定時,或者迴圈執行的執行緒池,可定時,並不是execute執行,如果execute執行就沒有效果延遲效果,對應還有兩個方法,scheduleAtFixedRate(),和ScheduleWithFixedDelay(),第二個引數為任務執行完之後間隔下一個任務的停頓時間,第三個引數為最開始沒執行任務時的等待時間

newSingleThreadExecutor

<span style="font-family:KaiTi_GB2312;font-size:12px;">public static void main( String[] args ) {
		ExecutorService executors = Executors.newSingleThreadExecutor();
		SleepTread mSleepTread;
		for ( int i = 0 ; i < 30 ; i++ ) {
			mSleepTread = new SleepTread();
			executors.execute(mSleepTread);
		}
		executors.shutdown();
	}</span>

<span style="font-family:KaiTi_GB2312;font-size:12px;">	public static void main( String[] args ) {
		ScheduledExecutorService executors = Executors.newSingleThreadScheduledExecutor();
		SleepTread mSleepTread;
		for ( int i = 0 ; i < 30 ; i++ ) {
			mSleepTread = new SleepTread();
//			executors.execute(mSleepTread);
			executors.schedule(mSleepTread, 3, TimeUnit.SECONDS);
		}
		executors.shutdown();
	}</span>