Multithreading|Concurrent Threads in java with example programs pdf|ppt

Multithreading in java Multithreading in java with examples Multithreading in java with examples programs
Multithreading in java pdf Multithreading in java ppt Concurrent threads in java

Multi Threading:

                  The languages like C,C++,Pascal ,Cobol etc are treated as single threaded      

  modeling language’s because their execution environment contains single flow of control.

  In general each and every single threaded modeling language provides only sequential   

  execution but not concurrent execution, and they does not concurrent execution ,they 

  does not contain any effective API.

              The languages like java and DotNet are comes under multithreading modeling   

  language’s because their execution environment contains multiple flow of controls. In 

  general each and every multithreaded modeling language provides both sequential and 

  concurrent executions and contains an effective API for development of multithreading 

  application.

  But in java what is thread.

   Definition of Thread:

         A flow of control is known as Thread. The purpose of thread is to execute the logic of 

     program which is written in the form of user defined methods.

  Definition Of Multi Threading:

        Multi Threading is one of the distinct feature in java. By using multithreading to provide   

   concurrent execution among all threads. Flow of Control is known as thread. If a java

   program is containing multiple flow of controls (threads) then that java program is known

   as multi Threads.

     In java programming we have the following API for development of multithreading 

     applications.

                 a)      Java.Lang.Thread (class)

                 b)      Java.Lang.Runnable (Interface)

      Whenever we write a java program by default their exists two types of threads. 

      They are

          a)      Foreground / Child Thread

          b)      Background / Parent Thread

    A foreground thread is one which is always executing the logic of the java program 

   which is written in the form of user defined methods.

   

   By default their exist single foreground thread and programmatically there is possibility 

   of existing multiple foreground threads (flow of controls).

    A Background thread is one which is always monitoring the execution status of fore

    ground threads. By their exists single back ground thread and programmatically also   

    recommended the create only one background thread. The real world implementation 

   of multithreading is to develop real world server software’s such as tomcat(Apache),

   Web logic glassfish(Sun) etc……..

   How do you justify each and every java program is multi threaded ?

   

  Whenever we start executing any java program, by default the logic of the java program

  is executed by one of the thread and it is known as foreground thread.

  Internally to monitor the execution status of foreground thread their exist another thread

  known as back ground thread.

  so a java program is containing by default two types of threads hence every java program 

  is  multi-threaded.

   How do you justify “threads of java executes concurrently” ?

   If threads are executed hour by hour , minute by minute and second by second then 

  such type of threads execution will be considered  as sequential execution. Whereas if   

  threads are executing  in the difference of millisecond by millisecond then those threads       

  execution will be considered as concurrent execution.

  Thread Based Applications:

1)         In Thread based applications their exists multiple flow of controls. All java and

       DotNet applications are comes under thread Based Applications.

2)             In thread based applications context switch is very less. Context switch is a 

       mechanism of switching the control from one address space to  another address 

       space is known as context switch must be less. Address space is an amount of     

       temporary memory space is created by operating system on the stack memory for its 

       temporary execution.

3)             Execution time of thread based application is less ,In thread based applications 

      irrespective of the number of sub programs ,their exist a single address space.

4)             All thread based applications are treated as light weight components ,Heavy weight components are those whose processing time is more whereas light weight component are those whose processing time is less.

                

     The following concepts are supports Multi threading

•       Life Cycle Of Threads
•       Ways of Creating Threads
•       Java.Lang.Thread
•       Java.Lang.Runnable
•       Internal Flow Of Thread
•       Synchronization
•       Inter Thread Communication
•       Multi Threading PPT