The thread pool is better with callable OH

Overview

Callable Introduction See: http://blog.csdn.net/zengmingen/article/details/53288119

Multithreading introduction See: Http://blog.csdn.net/zengmingen/article/details/53284999

Code Taskcallable.java

Package multithreading.pool;

Import java.util.concurrent.Callable;

public class Taskcallable implements callable<string>{
	
	/** thread number
	/private int tNo;
	
	Public taskcallable (int tNo) {
		this.tno=tno;
	}
	
	@Override public
	String call () throws Exception {
		
		string Tname=thread.currentthread (). GetName ();
		Long Currenttimemillis = System.currenttimemillis ();
		System.out.println (tno+ "-" +tname+ "Start Time is:" +currenttimemillis/1000);
		
		try {
			thread.sleep;
		} catch (Interruptedexception e) {
			e.printstacktrace ();
		}
		
		System.out.println (tno+ "-" +tname+ "is working ...");
		
		Return ' The thread is ' +tno
	}
	
}

Testpool.java

package Multithreading.pool;
Import java.util.ArrayList;
Import java.util.List;
Import java.util.concurrent.ExecutionException;
Import Java.util.concurrent.ExecutorService;
Import java.util.concurrent.Executors;

Import Java.util.concurrent.Future; public class Testpool {public static void main (string[] args) throws Exception, executionexception {list<future& Lt
		String>> futures = new arraylist<future<string>> ();
		Executorservice Newfixedthreadpool = Executors.newfixedthreadpool (2);
			for (int i = 0; i < 5; i++) {future<string> Future = newfixedthreadpool.submit (new taskcallable (i));
		Futures.add (future);
			 ///print result for (future<string> f:futures) {Boolean done = F.isdone (); It can be seen from the order in which the results are printed, even if they are not completed, blocking waiting System.out.println (done?).
			"Completed": "Incomplete");
		Get results from future, this method is blocked until the thread task returns the result System.out.println ("Completed thread returns future result:" + f.get ());
	} newfixedthreadpool.shutdown (); }

}

Run Results

0-pool-1-thread-1 Start Time is:1479808023
Not completed
1-pool-1-thread-2 Start Time is:1479808023
0-pool-1-thread-1 is working ...
1-pool-1-thread-2 is working ...
Finished thread returns future result: the thread is 0
has been completed
Finished thread returns future result: the thread is 1
Not completed
2-pool-1-thread-1 Start Time is:1479808024
3-pool-1-thread-2 Start Time is:1479808024
3-pool-1-thread-2 is working ...
2-pool-1-thread-1 is working ...
4-pool-1-thread-2 Start Time is:1479808026
Finished thread returns future result: the thread is 2
has been completed
Finished thread returns future result: the thread is 3
Not completed
4-pool-1-thread-2 is working ...
Finished thread returns future result: the thread is 4

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