Java – the comparator must override superclass methods

I'm making a treemap < < string, string >, and hope to arrange it in descending order I created the following Comparators:

Comparator<String> descender = new Comparator<String>() {

    @Override
    public int compare(String o1,String o2) {
        return o2.compareTo(o1);
    }
};

I built a treemap as follows:

myMap = new TreeMap< String,String>(descender);

However, I received the following error:

The method compare(String,String) of type new Comparator<String>(){} must override a superclass method

I've never completely touched generic drugs. What did I do wrong?

Solution

Your eclipse project is obviously set to Java 1.5 Interface methods do not support @ override annotation Delete the comment or fix the compliance level of the project to Java 1.6