package Thread;

//JDK5.0新增的 实现Callable接口

import java.util.concurrent.Callable;

import java.util.concurrent.ExecutionException;

import java.util.concurrent.FutureTask;

//1实现Callable接口的实现类

class NumThread implements Callable{

int sum = 0;

//2实现call（），此方法有返回值

@Override

public Object call() throws Exception {

for (int i = 1; i <= 100; i++) {

sum += i;

}

return sum;

}

}

public class ThreadNew {

public static void main(String[] args) {

//3创建Callable接口实现类的对象

NumThread numThread = new NumThread();

//4将此对象作为参数传递到FutureTask构造器中，创建FutureTask对象

FutureTask futureTask = new FutureTask(numThread);

//将FutureTask对象传递到Thread类的构造器中，创建Thread对象，并执行start（）方法

new Thread(futureTask).start();

try {

//get()为FutureTask构造器参数Callable实现类重写的call（）的返回值

Object sum = futureTask.get();

System.out.println(sum);

} catch (InterruptedException e) {

e.printStackTrace();

} catch (ExecutionException e) {

e.printStackTrace();

}

}

}