What Is Future Java

A Java Future, java. … Future , represents the result of an asynchronous computation. When the asynchronous task is created, a Java Future object is returned. This Future object functions as a handle to the result of the asynchronous task.

Why do we need Future in Java?

The Future class in Java is another way to write asynchronous code. By using Future and FutureTask, you can write a method that does long computation but returns immediately. Those methods, instead of returning a result, return a Future object. You can later get the result by calling the Future.

What is a Future object?

Think of a Future as an object that holds the result – it may not hold it right now, but it will do so in the future (once the Callable returns). Thus, a Future is basically one way the main thread can keep track of the progress and result from other threads.