About Java Atomic Package usage help

Recently learning some knowledge of high concurrency, when learning to Atomic, run the program, not the same as expected

The code is as follows

 Public classLearn13 {atomicinteger count=NewAtomicinteger (0); voidm () { for(inti= 0; i< 10000; i++) count.getandincrement (); }         Public Static voidMain (string[] args) {FinalLearn12 Learn =NewLearn12 (); Runnable R=NewRunnable () {@Override Public voidrun () {learn.m ();        }                    }; List<Thread> threads =NewArraylist<thread>();  for(inti= 0; i< 10; i++) {Threads.add (NewThread (R, "Thead" +i)); }         for(Thread thread:threads) {Thread.Start (); }                 for(Thread thread:threads) {Try{thread.join (); } Catch(interruptedexception e) {e.printstacktrace ();    }} System.out.println (Learn.count); }}

Example will be able to get 100000 results, but I did not get, each time is not the same, the method is not atomic operation, I do not know where there is a problem, I hope to see can help answer the next

About Java Atomic Package usage help