· i would like to know the difference between completablefuture,future and observable rxjava. In the above-mentioned case, while waiting on network i/o, a function … This function may block for longer than … · the class template std::future provides a mechanism to access the result of asynchronous operations: This will no longer work in future releases of the jdk. What i know is all are asynchronous but future. get () blocks the thread … · the c++11 standard does not provide a direct way to cancel a task started with std::async. Mockito is currently self-attaching to enable the inline-mock-maker. Right after calling this function, valid … You can use annotations because annotations have existed since python 3. 0, you dont need to import anything from future to use them what youre … You will have to implement your own cancellation mechanism, such as passing in an … · the first part is easy: An asynchronous operation (created via std::async, … · i get this warning while testing in spring boot: It is like a placeholder for a value that will be materialized in the future. · the get member function waits (by calling wait ()) until the shared state is ready, then retrieves the value stored in the shared state (if any). A future is like the objects from javascript. · a future statement is a directive to the compiler that a particular module should be compiled using syntax or semantics that will be available in a specified future release of python. · specifies state of a future as returned by wait_for and wait_until functions of std::future and std::shared_future. · if the future is the result of a call to std::async that used lazy evaluation, this function returns immediately without waiting.