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Thread Safety Question?
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Joe Harry
Ranch Hand
Joined: Sep 26, 2006
Posts: 8795
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The following is also from Javaranch,
Which of the following are considered Thread Safe?
1) Local Variables
2) Class Variables
3) Context Variables
4) Request Variables?
I choose 1 and 2. Am I right?
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SCJP 1.4, SCWCD 1.4 - Hints for you, SCBCD Hints - Demnachst, SCDJWS - Auch Demnachst
Did a rm -R / to find out that I lost my entire Linux installation!
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Christophe Verré
Sheriff
Joined: Nov 24, 2005
Posts: 14672
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No. 1 and 4. Only method local variables and request variables are thread safe. I don't like the "Class Variables" thing  What class is this ? The servlet class ?
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[My Blog]
All roads lead to JavaRanch
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Sagar kanchi
Ranch Hand
Joined: Oct 07, 2005
Posts: 50
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I think Class variables are static varibles and class refers to Servlet class itself.
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Where there are more wonders there is less knowledge
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Joe Harry
Ranch Hand
Joined: Sep 26, 2006
Posts: 8795
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Yes, class variables are static servlet variables in the question's context!
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Christophe Verré
Sheriff
Joined: Nov 24, 2005
Posts: 14672
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class variables are static servlet variables
Not thread safe then.
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subject: Thread Safety Question?
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