Synchronization: useful or not in this case

Question

ok, I'm getting a bit confused if the synchronization is useful or not in this case.
As far as i know, is synchronizsation required if more than one thread is able to enter a specified function/codefragment, but how about "atomaric" functions?
long[]longarray = new long[10];
String[]stringarray = new String[10];
/*some code*/
public String ThisCanBeEnteredByManyThreads(int index,int type){
switch(type)
case 1:
return stringarray[10];
case 2:
return String.valueof(longarray[index]);
}When I get it right, the return value will be a reference on the current String object. If another function now perform something like
stringarray[index]="woods";
longarray[index]=10; then it souldn't affect my reference I returned in the previouse function. Or is this not atomaric (only setting the reference, not the string creating)?
Or is the function "String foo = stringarray[index]" not atomar?

Answer 1

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