Synchronized and local copies of variables

Question

I\'m looking at some legacy code which has the following idiom:

Map myMap = someGlobalInstance.getMap();
synchronized (myMap) {
    item =         


        

Answer 1

I think the code could be sound, depending on what the getMap() method does. If it keeps a reference to an instance that has to be shared between threads it makes sense. The warning is irrelevant since the local variable is not initialized locally.