如何在鸿蒙系统中实现多线程操作?

// Index.ets代码
import { taskpool} from '@kit.ArkTS';
import Handle from './Handle'; // 返回静态句柄

// 步骤1: 定义并发函数，内部调用同步方法
@Concurrent
async function func(num: number): Promise<number> {
  // 调用静态类对象中实现的同步等待调用
  // 先调用syncSet方法并将其结果作为syncSet2的参数，模拟同步调用逻辑
  let tmpNum: number = Handle.syncSet(num);
  console.info("this is Child_Thread")
  return Handle.syncSet2(tmpNum);
}

// 步骤2: 创建任务并执行
async function asyncGet(): Promise<void> {
  // 创建task、task2并传入函数func
  let task: taskpool.Task = new taskpool.Task(func, 1);
  let task2: taskpool.Task = new taskpool.Task(func, 2);
  // 执行task、task2任务，await保证其同步执行
  let res: number = await taskpool.execute(task) as number;
  let res2: number = await taskpool.execute(task2) as number;
  // 打印任务结果
  console.info("taskpool: task res is: " + res);
  console.info("taskpool: task res2 is: " + res2);
}

@Entry
@Component
struct Index {
  @State message: string = 'Hello World';

  build() {
    Row() {
      Column() {
        Text(this.message)
          .fontSize(50)
          .fontWeight(FontWeight.Bold)
          .onClick(async () => {
            // 步骤3: 执行并发操作
            asyncGet();
            let num: number = Handle.syncSet(100);
            console.info("this is Main_Thread!")
          })
      }
      .width('100%')
      .height('100%')
    }
  }
}

// Index.ets
import { worker } from '@kit.ArkTS';

@Entry
@Component
struct Index {
  @State message: string = 'Hello World';

  build() {
    Row() {
      Column() {
        Text(this.message)
          .fontSize(50)
          .fontWeight(FontWeight.Bold)
          .onClick(() => {
            let w: worker.ThreadWorker = new worker.ThreadWorker('entry/ets/workers/MyWorker.ts');
            w.onmessage = (): void => {
              // 接收Worker子线程的结果
            }
            w.onerror = (): void => {
              // 接收Worker子线程的错误信息
            }
            // 向Worker子线程发送Set消息
            w.postMessage({'type': 0, 'data': 'data'})
            // 向Worker子线程发送Get消息
            w.postMessage({'type': 1})
            // ...
            // 根据实际业务，选择时机以销毁线程
            w.terminate()
          })
      }
      .width('100%')
    }
    .height('100%')
  }
}