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

//非同步呼叫
public class Demo01 {
    public static void main(String[] args) throws ExecutionException, InterruptedException {
/*
        //沒返回值的非同步呼叫
        CompletableFuture<Void> completableFuture = CompletableFuture.runAsync(()->{
            try {
                TimeUnit.SECONDS.sleep(2);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println(Thread.currentThread().getName() + "runAsync");
        });
        completableFuture.get();

  */
        //帶返回值的非同步呼叫
        CompletableFuture<Integer> future = CompletableFuture.supplyAsync(
                ()->{
                    System.out.println(Thread.currentThread().getName() + "supplyAsync,toInt");
                    int i = 10/0;
                    return 1024;
                }
        );
        future.whenComplete((t, u)->{
            System.out.println("t=" + t);
            System.out.println("u=" + u);
        }).exceptionally((e)->{e.printStackTrace();
        return 233;}).get();
    }
}