HarmonyOS鸿蒙Next企业面试题之用过线程通信吗，线程是怎么进行通信的？

用过线程通信，线程是这样进行通信的，方法如下：

Worker 线程：用于后台任务处理，避免阻塞主线程。主线程和Worker线程通过postMessage和onmessage进行通信

TaskPool： 主要是使用Promise实现子线程和主线程通信的

import { taskpool } from '@kit.ArkTS';

//定义一个子线程
@Concurrent
function printArgs(args: number): number {
  console.info("printArgs: " + args);
  return args;
}
//定义一个子线程
@Concurrent
async function getInfo(username: string) {
  let name=username+"_harmonyos";
  console.info("getInfo: " + name);
  return await new Promise<string>((resolve, reject) => {
    setTimeout(() => {
      resolve(name);
    }, 2000);
  })
}
//定义子线程返回一个数组
@Concurrent
async function getNewsList(): Promise<string[]> {
    return await new Promise<string[]>((resolve, reject) => {
      setTimeout(() => {
        resolve(["news1", "news2", "news3"]);
      }, 5000)
    })
}

@Builder
export function TaskPoolPageBuilder() {
  TaskPoolPage()
}

@Component
struct TaskPoolPage {
  private pathStack=new NavPathStack()
  executeTaskpool01(){
    console.info("1");
    taskpool.execute(printArgs, 100).then((value: Object) => { // 100: test number
      console.info("taskpool result: " + value);
    });
    console.info("2");

  }
  executeTaskpool02(){
    console.info("11");
    taskpool.execute(getInfo, "zhangsan").then((value: Object) => {
      console.info("taskpool result: " + value);
    })
    console.info("22");
  }

  executeTaskpool03(){
    console.info("11");
    taskpool.execute(getNewsList).then((value: Object) => {
      console.info("taskpool result: " + JSON.stringify(value));
    })
    console.info("22");
  }

  build() {
    NavDestination() {
      Column({ space: 10 }) {


        Button("TaskPool调用子线程")
          .onClick(() => {
            this.executeTaskpool01()
          })

        Button("TaskPool调用子线程2")
          .onClick(() => {
            this.executeTaskpool02()
          }).margin({ left: 10, right: 10, top: 10, bottom: 10 })

        Button("TaskPool调用子线程3")
          .onClick(() => {
            this.executeTaskpool03()
          }).margin({ left: 10, right: 10, top: 10, bottom: 10 })
      }
      .width("100%")
      .height("100%")
    }
    .title("TaskPool实现多线程")
    .hideTitleBar(false)
    .onReady((context: NavDestinationContext) => {
      this.pathStack = context.pathStack
    })
  }
}

也可以使用eventHub实现