Which one is thread safe,(1)Arraylist(2)Vector(3)Map(4)Table?2>What is mean by Singletone object how to create it plz explain

Interview Candidate
Jun 17th, 2006
4
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Showing Answers 1 - 4 of 4 Answers

anurag soni

Jun 18th, 2006

only vector is thread safe.
singleton class is:
we can create only one object of this class.

sbarik
Profile Answers by sbarik

Jun 19th, 2006

Vector is thread Safe.
Singleton Class is a class of which U can make only one object.The programm checks whether any object of that class exists or nor,if it finds the existing one then returns that Object otherwise creates a new one.. The progamm below shows a Singleton class ..this will help u..
public class SingletonTest
{
   private static SingletonTest obj;
private SingletonTest()
{
/* ..code..*/
}
public static SingletonTest onlyInstance()
{
if(obj==null)
{
    obj=new SingletonTest();
     return obj;
}
else
return obj;
}
}

diala

Aug 16th, 2006

can some one explain clearly what is thread safe

deny eldo

Aug 24th, 2006

when a class implements singlethreadmodel this class object can acess the code in a synchronized manner. that is one at a time(single thread)