Win a copy of TDD for a Shopping Website LiveProject this week in the Testing forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Paul Clapham
  • Ron McLeod
  • Jeanne Boyarsky
  • Tim Cooke
Sheriffs:
  • Liutauras Vilda
  • paul wheaton
  • Henry Wong
Saloon Keepers:
  • Tim Moores
  • Tim Holloway
  • Stephan van Hulst
  • Carey Brown
  • Frits Walraven
Bartenders:
  • Piet Souris
  • Himai Minh

Thread names??

 
Ranch Hand
Posts: 92
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
hi,
In the JDK documentation of the Thread class the following lines are mentioned:
"Every thread has a name for identification purposes. More than one thread may have the same name. If a name is not specified when a thread is created, a new name id generated for it."
My question is:
1) How can two threads have the same name? for e.g.

Thread t1=new Thread();
Thread t1=new Thread();
the above lines will not compile as t1 is repeated. If this is not the name they are talking about then what is it?
2) If I create a thread as follows
new Thread(runnable_class).start();
then what is the name given to it by the system. Is this name unique or can be the same???

Please clear my doubts.
Sagar Sharma

 
Ranch Hand
Posts: 1871
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi,
There is a difference between the reference of an Object and the name of a thread.
a reference to an object is a pointer like
Thread t=new Thread();
in the above line t is a reference to the thread and not its name.
The name of a thread can be set using the setName() method of the thread class or by using the overloaded constructor of the Thread class which takes a String as argument.
The following program demonstrates the setting of names of 100 threads. The thread names are not unique and more than one thread can have the same name.


coming to the second part of your question

The program above does not assign any name to the threads created. I get the following output. What is yours??
Thread Name is : Thread-0
Thread Name is : Thread-1
Thread Name is : Thread-2
Thread Name is : Thread-3
Thread Name is : Thread-4
Thread Name is : Thread-5
Thread Name is : Thread-6
Thread Name is : Thread-7
Thread Name is : Thread-8
Thread Name is : Thread-9
Thread Name is : Thread-10
Thread Name is : Thread-11
Thread Name is : Thread-12
Thread Name is : Thread-13
Thread Name is : Thread-14
Thread Name is : Thread-15
Thread Name is : Thread-16
Thread Name is : Thread-17
Thread Name is : Thread-18
Thread Name is : Thread-19
Thread Name is : Thread-20
Thread Name is : Thread-21
Thread Name is : Thread-22
Thread Name is : Thread-23
Thread Name is : Thread-24
Thread Name is : Thread-25
Thread Name is : Thread-26
Thread Name is : Thread-27
Thread Name is : Thread-28
Thread Name is : Thread-29
Thread Name is : Thread-30
Thread Name is : Thread-31
Thread Name is : Thread-32
Thread Name is : Thread-33
Thread Name is : Thread-34
Thread Name is : Thread-35
Thread Name is : Thread-36
Thread Name is : Thread-37
Thread Name is : Thread-38
Thread Name is : Thread-39
Thread Name is : Thread-40
Thread Name is : Thread-41
Thread Name is : Thread-42
Thread Name is : Thread-43
Thread Name is : Thread-44
Thread Name is : Thread-45
Thread Name is : Thread-46
Thread Name is : Thread-47
Thread Name is : Thread-48
Thread Name is : Thread-49
Thread Name is : Thread-50
Thread Name is : Thread-51
Thread Name is : Thread-52
Thread Name is : Thread-54
Thread Name is : Thread-55
Thread Name is : Thread-57
Thread Name is : Thread-59
Thread Name is : Thread-61
Thread Name is : Thread-63
Thread Name is : Thread-65
Thread Name is : Thread-67
Thread Name is : Thread-69
Thread Name is : Thread-71
Thread Name is : Thread-73
Thread Name is : Thread-75
Thread Name is : Thread-77
Thread Name is : Thread-79
Thread Name is : Thread-81
Thread Name is : Thread-53
Thread Name is : Thread-56
Thread Name is : Thread-58
Thread Name is : Thread-60
Thread Name is : Thread-62
Thread Name is : Thread-64
Thread Name is : Thread-66
Thread Name is : Thread-68
Thread Name is : Thread-70
Thread Name is : Thread-72
Thread Name is : Thread-74
Thread Name is : Thread-76
Thread Name is : Thread-78
Thread Name is : Thread-80
Thread Name is : Thread-82
Thread Name is : Thread-83
Thread Name is : Thread-84
Thread Name is : Thread-85
Thread Name is : Thread-86
Thread Name is : Thread-88
Thread Name is : Thread-90
Thread Name is : Thread-92
Thread Name is : Thread-94
Thread Name is : Thread-96
Thread Name is : Thread-98
Thread Name is : Thread-87
Thread Name is : Thread-91
Thread Name is : Thread-95
Thread Name is : Thread-99
Thread Name is : Thread-93
Thread Name is : Thread-89
Thread Name is : Thread-97

------------------
Regds.
Rahul P. Mahindrakar

[This message has been edited by Rahul Mahindrakar (edited October 24, 2000).]
 
Catch Ernie! Catch the egg! And catch this tiny ad too:
Free, earth friendly heat - from the CodeRanch trailboss
https://www.kickstarter.com/projects/paulwheaton/free-heat
reply
    Bookmark Topic Watch Topic
  • New Topic