java利用CountDownLatch实现并行计算

java利用CountDownLatch实现并行计算

本文实例为大家分享了利用CountDownLatch实现并行计算的具体代码，供大家参考，具体内容如下

import java.util.concurrent.CountDownLatch;

/**

* @Author pipi

* @Date 2018/10/15 13:56

**/

public class ParallelComputing {

private int[] nums;

private String[] info;

private CountDownLatch countDownLatch;

public ParallelComputing(String[] info) {

this.info = info;

int size = info.length;

nums = new int[size];

this.countDownLatch = new CountDownLatch(size);

}

public void calc(String line, int index) throws InterruptedException {

String[] numbers = line.split(",");

int total = 0;

for (String num : numbers) {

total += Integer.parseInt(num);

}

Thread.slTCWvLGxjEeep(5000);

nums[index] = total;

countDownLatch.countDown();

System.out.println(Thread.currentThread().getName() + "执行计算任务..." + line + ",结果为：" + total);

}

public void sum() {

System.out.println("汇总线程开始执行...");

int total = 0;

for (int i : nums) {

total += i;

}

System.out.println("汇总线程结束执行...结果为：" + total);

}

public void calcSum() throws InterruptedException {

int size = info.length;

for (int i = 0; i < size; i++) {

final int j = i;

new Thread(() -> {

try {

calc(info[j], j);

} catch (InterruptedException e) {

e.printStackTrTCWvLGxjEace();

}

}).start();

}

countDownLatch.await();

sum();

}

public static void main(String[] args) throws InterruptedException {

long start = System.currentTimeMillis();

String[] info = {

"2,22",

"3,33",

"232,32,76,84",

"99,45,1"

};

ParallelComputing parallelComputing = new ParallelComputing(info);

parallelComputing.calcSum();

long end = System.currentTimeMillis();

System.out.println(end - start);

}

}

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