Explain Multi-Threading in Java?

It is a process in java through which multiple threads can be executed simultaneously. A thread can be explained as a lightweight sub-process, it is the smallest unit of processing. Both multiprocessing and multithreading are done to achieve multitasking in java. The reason why most of the developers use multithreading over multiprocessing is that the threads use a shared memory area. Because they don’t allocate a separate area in the memory and they save a lot of space in the memory because of that.