同时调用多个方法返回返回对象

Question

调用多个方法，我想同时调用它们，它们应该等待彼此完成。

else {
    PricingFromS4Request pricingRequest = new PricingFromS4Request();
    ProductFromS4Request productRequest = new ProductFromS4Request();
    PricingFromS4ServiceImpl service = new PricingFromS4ServiceImpl();

    //Create 1 thread for below line
    pricingRequest = service.createS4PricingRequest(ABeanObject, SomeArrayList);

    //Create 1 more thread for below line
    productRequest = service.createS4ProductRequest(SomeList);

    //Send pricingRequest and productRequest  into another method 
    SomeMethod(pricingRequest,productRequest);

}

无法将两行放在线程内

Answer 1

在Java 7中，这是一个选择：

    PricingFromS4Request pricingRequest = new PricingFromS4Request();
    ProductFromS4Request productRequest = new ProductFromS4Request();
    PricingFromS4ServiceImpl service = new PricingFromS4ServiceImpl();

    ExecutorService executor = Executors.newFixedThreadPool(2);

    Future<PricingFromS4Request> f1 = executor.submit(new Callable<PricingFromS4Request >() {
        public PricingFromS4Request  call() {
            return service.createS4PricingRequest(ABeanObject, SomeArrayList);
        }
    });
    Future<ProductFromS4Request> f2 = executor.submit(new Callable<ProductFromS4Request>() {
        public ProductFromS4Request call() {
            return service.createS4ProductRequest(SomeList);
        }
    });
    SomeMethod(f1.get(), f2.get());
    executor.shutdown();