在java并发中提供了Callable<T>的一个接口，可以在线程中返回一个参数，这是接口Runable所做不到的。。
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54 |
import java.util.ArrayList;import java.util.Iterator;import java.util.concurrent.Callable;import java.util.concurrent.ExecutionException;import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;import java.util.concurrent.Future;public class CallableTest { /** * 可以返回一个参数 * @author Administrator * */ class
TaskCallable implements
Callable<String> { int
id; TaskCallable(int
id) { this.id = id; } /** * 线程中可以返回一个参数 */ @Override public
String call() throws
Exception { return
"xxxx" + id; } } public
static void main(String[] args) { CallableTest test = new
CallableTest(); ArrayList<Future<String>> arrFuture = new
ArrayList<Future<String>>();//利用future储存 ExecutorService executorServer = Executors.newCachedThreadPool(); try
{ for
(int i = 0; i < 10; i++) { Future<String> future = executorServer .submit(test.new
TaskCallable(i));//submit产生futrue对象 arrFuture.add(future); } for
(Future<String> future : arrFuture) { System.out.println(future.get()); } } catch
(InterruptedException e) { System.out.print(e); } catch
(ExecutionException e) { System.out.print(e); } finally
{ executorServer.shutdown(); } }} |
call函数返回一个参数，跟Runable所不同的是Runable是调用excute(Thread),Callable是调用
|
1 |
submit(Thread). |
java并发--Callable的使用,布布扣,bubuko.com
原文：http://www.cnblogs.com/a-bird/p/3609042.html