Key Methods in the Java ForkJoinTask Superclass

The video transcript delves into the key methods of the ForkJoinTask superclass, which is essential for parallel programming with the Java fork-join framework. The class inherits from the Future interface and focuses on three primary methods: fork(), join(), and invoke(). The fork() method allows for asynchronous task execution by placing tasks in a worker thread's double-ended queue. Conversely, join() waits for a forked task to complete and serves as a synchronization point, ensuring memory visibility across threads. The transcript also introduces a "collaborative Jiffy Lube model" to explain how threads help each other complete tasks. The video outlines the invoke() method that performs tasks synchronously, differing from the other ForkJoinTask methods.