Static counter in Java

Counter.java

import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.atomic.AtomicInteger;

public class Counter {

    private final static ConcurrentHashMap<String, AtomicInteger> map=new ConcurrentHashMap<>();

    public static int inc(String name){
        return map.computeIfAbsent(name, x -> new AtomicInteger()).getAndIncrement();
    }

}