Question about Threads with WHILE and FOR

Hi all

I have a question on threads with a loop on this topic sentece.

Have the following class:
class test{

bool foundThing;
PararellSearch(string [] lista, string s2find){
while(!foundThing)
{
for(int i=0;i<lista.length;i++){
if(s2find==lista){

foundThing = true;

break;

}

}

}

}
If I start 10 threads which are using the PararellSearch method to look into lista, each of them inits into a different point, and when some of them found the right word then set foundThing= true. It will stop WHILE and FOR loop in all the threads? 
If not, how could I do it?

Thanks a lot for your help.
David.

Edited by: user13553506 on 27-dic-2010 12:15

Edited by: user13553506 on 27-dic-2010 15:54                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
         
         
         When you post the code, you'll want to post a [url http://sscce.org] NBS so that it is clear that what you try to do it. For example:
1. in the validation of code, put {code} before and after him, then he will be readable.
2. the convention in Java must start with a capital letter class names, so test, could not test.
3. the convention in Java is to start with lowercase letters, so parallelSearch, not PWhateverMisspellingYouHaveThere method names.
4. There is no such thing as bool. It is a Boolean.
5. it is a String, not string.
6. never use == to compare the States of objects (such as the content of the strings). Use equals().
To answer your question: If you create Test 10 objects, then, given that foundThing is an instance variable, there will be 10 variables entirely independent foundThing. An adjustment will not affect the other. In this case, the easiest thing to do would be to foundThing static, so that there is only one copy which is shared by the Test class as a whole. This isn't the only way, or even the best way in all cases, but you have enough other problems to face, so for now to keep things simple.
Finally, when you have a variable that is shared by multiple threads, you need to either make all the access to this variable synchronized on the same lock (reads and writes), or you need to declare the volatile variable. 
          
           
		  Tags: Java 
         
          
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