Скачать или смотреть Multi threading in java | Runnable interface by Engineer verma

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This is the first video of playlist multithreading in java, in this video we have discussed about threading concepts and creating thread using Runnable interface :

key points of threading :
-a multithreaded program contains two or more parts that can run concurrently.
-its specialized form of multitasking
-there are two types of multitasking: process based and thread based
-in process based , in which your computer run two or more program concurrently,
here program is the smallest unit of code that can be dispatched by schedular
-in thread based , thread is the smallest unit of dispatchable code.,
this means here single program can perform two or more task simultaneously.
-process are heavy weight tasks that require their own separate address space,
inter process communication is expensive and limited and context switching from one process to another also costly.

-threads are light weight, they share same address space and cooperatively share the same heavy weight process
,inter thread communication is inexpensive , and context switching from one thread to the next is lower in cost.

-java programs make use of process based multitasking environments, process based multitasking is not under java's
direct control, however multithreaded multitasking is.

-When a java program starts up one thread begins running immediately . this usually called the main thread of your program.
because it is the one that is executed when your program begins. the main thread is important for two reasons:
-it is thread from which other "child" threads will be spawned.
-often, it must be last thread to finish execution because it performs various shutdown actions.
although its created automatically when program started.