Re: How to assign a variable to Threads

From:
Andrea Francia <andrea.francia@gmx.it.invalid>
Newsgroups:
comp.lang.java.programmer
Date:
Sun, 06 Apr 2008 18:21:20 GMT
Message-ID:
<Aw8Kj.283419$%k.400198@twister2.libero.it>
Sanny wrote:

 > private static final ThreadLocal < Integer > uniqueNum =
 > new ThreadLocal < Integer > () {
 > @Override protected Integer initialValue() {
 > return uniqueId.getAndIncrement();


I am using Java 1.3 which do not use Generics.

< Integer > will not be recognized in java1.3 giving compiler error.

Is there any way to do that Manually???

I want to bot set and reset the Values of Thread Number.


Generics are just something more of syntactic sugar that prevent you
from using casting.
Every example that uses generics can be rewritten without them adding
some casting. The only problem is that you lose the compile time type
checking.
This is the version without generics (and without autoboxing):

  import java.util.concurrent.atomic.AtomicInteger;

  public class UniqueThreadIdGenerator {

      private static final AtomicInteger uniqueId = new AtomicInteger(0);

      private static final ThreadLocal uniqueNum =
          new ThreadLocal () {
              @Override protected Object initialValue() {
                  return uniqueId.getAndIncrement();
          }
      };

      public static int getCurrentThreadId() {
          return ((Integer)uniqueNum.get()).intValue();
      }
  } // UniqueThreadIdGenerator

--
Andrea Francia
http://www.andreafrancia.it/

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