Which Java collection should I use to implement a thread-safe cache?

Question

I\'m looking to implement a simple cache without doing too much work (naturally). It seems to me that one of the standard Java collections ought to suffice, with a little extra

Answer 1

LinkedHashMap is easy to use for cache. This creates an MRU cache of size 10.

private LinkedHashMap cache = new LinkedHashMap(10, 0.7f, true) {
    @Override
    protected boolean removeEldestEntry(Map.Entry eldest) {
        return size() > 10;
    }
};

I guess you can make a class with synchronized delegates to this LinkedHashMap. Forgive me if my understanding of synchronization is wrong.