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。。
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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
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1
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submit(Thread). |