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Thread Constructors 
 

In this section, you will learn about the different types of thread constructors.

 

Thread Constructors

                         

Several constructors are available for creating new Thread instances.
    

Thread()

Thread(String)            

Thread(Runnable)

Thread(Runnable,String)

Thread(ThreadGroup,String)

Thread(ThreadGroup,Runnable)

Thread(ThreadGroup,Runnable,String)

Thread(ThreadGroup, Runnable, String, long)

        

ThreadGroupAll threads belongs to an instance of the ThreadGroup Class. ThreadGroup is used to represent a group of threads. ThreadGroups can be shown in a hierarchical manner. There is only one root ThreadGroup that contains all other thread and groups and each subgroups can contain other groups and threads. All thread have only one thread group. And all thread groups (except the root thread group) belongs to exactly one parent thread group. Threads can access only belonging thread group.

When a new ThreadGroup is created, it is added as a member of existing ThreadGroup.
If a thread x in group1, and executes the code:

    ThreadGroup group2=new ThreadGroup(“group2”);

Then the newly formed group2 comes under group1. If you want a parent group other than default then you have to specify the parent group at the time of creation.

    ThreadGroup group2=new ThreadGroup(group2,“group3”);

Then newly formed group3 comes under the group2.

Some important methods are:

  • getName() – This method is used to retrieve the name of particular group.
     
    ThreadGroup g=new ThreadGroup(“RoseIndia”);
      String gname=g.getName();

     

  • getParent() – This method is used to retrieve the name of parent threadgroup of sub group.

  •    ThreadGroup group=group3.getParent();

      

  • activeGroupCount() – This method returns the number of active thread group in a particular thread group and all its subgroups.
       int size=group.activeGroupCount();

          

  • getThreadGroup() – This method is used to know the thread is belong to which thread group.
    ThreadGroup group=threadx.getThreadGroup();

      

                         

» View all related tutorials
Related Tags: java c class interface object io read thread int this creation extend run lan ext e il section can im

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