Difference Between Multithreading and Multitasking in Java

Multithreading:

It is a programming language concept in which a program or process is divided into two or more subprograms that are executed at the same time in parallel.

Multitasking:

It is the concurrent execution of multiple tasks over a certain period of time.

Multithreading vs Multitasking:

Multi-threading	Multitasking
It is a programming language concept in which a program or process is divided into two or more subprograms that are executed at the same time in parallel.	It is an operating system concept in which multiple tasks are performed simultaneously.
It is highly efficient.	It is less efficient than Multi-threading.
It supports execution of multiple parts of a single program simultaneously.	It supports execution of multiple programs simultaneously.
The processor has to switch between different parts or threads of a program.	The processor has to switch between different programs or processes.
A thread is the smallest unit in multi-threading.	A program or process is the smallest unit in multitasking.
It is cost effective in case of context switching.	It is expensive in case of context switching.
It helps in developing efficient programs.	It helps in developing efficient operating systems.