67、商城业务---异步---CompletableFuture---线程串行化

import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class ThreadTest {
    public static ExecutorService service = Executors.newFixedThreadPool(5);
    public static void main(String[] args) throws ExecutionException, InterruptedException {
        System.out.println("main-----start");

        //thenRunAsync
        CompletableFuture<Void> future = CompletableFuture.supplyAsync(() -> {
            System.out.println("当前线程：：" + Thread.currentThread().getId());
            int i = 10/2;
            System.out.println("运行结果：：" + i);

            return i;
        }, service).thenRunAsync(()->{
            System.out.println("任务二启动了");
        },service);

        //thenAcceptAsync
        CompletableFuture<Void> voidCompletableFuture = CompletableFuture.supplyAsync(() -> {
            System.out.println("当前线程：：" + Thread.currentThread().getId());
            int i = 10 / 2;
            System.out.println("运行结果：：" + i);

            return i;
        }, service).thenAcceptAsync((result) -> {
            System.out.println("上一步的执行结果：：" + result);
        }, service);

        //thenApplyAsync
        CompletableFuture<String> stringCompletableFuture = CompletableFuture.supplyAsync(() -> {
            System.out.println("当前线程：：" + Thread.currentThread().getId());
            int i = 10 / 2;
            System.out.println("运行结果：：" + i);

            return i;
        }, service).thenApplyAsync((result) -> {
            return "hello---" + result;
        }, service);
        System.out.println(stringCompletableFuture.get());
        
        
        System.out.println("main-----end--");
    }
}