java - 缩短嵌套 lambda

Question

我想将任务列表映射到 List<Callable<Tasks>> :

List<Callable<Tasks>> callableTasks = tasks.stream().map(t ->
        {
            // how to return callable directly and omitting curly braces?
            Callable<Task> task = () -> run(t);
            return task;
        }).collect(Collectors.toList());

如何缩短上述表达式以直接返回可调用对象？

Answer 1

您可以使用 Executors 中的静态方法类，例如Executors.callable:

tasks.stream().map(t -> callable(() -> run(t))).collect(Collectors.toList());