JAVA编程思想第四版-多线程的练习答案之练习10

package exercise.exercise10;import java.util.ArrayList;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 MainFibonacci {static int count=0;public MainFibonacci(int n) {System.out.println("exercise " + n);}public static void main(String[] args) {ExecutorService es = Executors.newCachedThreadPool();ArrayList<Future<Integer>> resultList = new ArrayList<Future<Integer>>();for (int i = 1; i < 10; i++) {// resultList.add(es.submit(new MainFibonacci(i)));//练习5的实现方式resultList.add(es.submit(new Callable<Integer>() {@Overridepublic Integer call() throws Exception {return runTask(count++);}private Integer runTask(int count) {return getFibonacciInner(count);}}));}ArrayList<Integer> futureList = new ArrayList<Integer>();for (Future<Integer> future : resultList) {try {futureList.add(future.get());} catch (InterruptedException e) {e.printStackTrace();} catch (ExecutionException e) {e.printStackTrace();} finally {es.shutdown();}}Integer[] sequence = new Integer[futureList.size()];sequence[0] = futureList.get(0);for (int i = 1; i < futureList.size(); i++) {sequence[i] = sequence[i - 1] + futureList.get(i);}for (int i = 0; i < sequence.length; i++) {System.out.println("第" + (i+1) + "fibonacci的数为：" + futureList.get(i));}for (int i = 0; i < sequence.length; i++) {System.out.println("前" + (i+1) + "fibonacci的值总和为：" + sequence[i]);}}public static int getFibonacciInner(int fibo) {if (0 == fibo) {return 0;}if (fibo < 2) {return 1;}return getFibonacciInner(fibo - 1) + getFibonacciInner(fibo - 2);}}/** * 前1fibonacci的值总和为：0 前2fibonacci的值总和为：1 前3fibonacci的值总和为：2 前4fibonacci的值总和为：4 * 前5fibonacci的值总和为：7 前6fibonacci的值总和为：12 前7fibonacci的值总和为：20 * 前8fibonacci的值总和为：33 前9fibonacci的值总和为：54 *  */

JAVA编程思想第四版21章，第669页，练习10的答案，如果发现错误，请多指正！