Eclipse makes me angry

public class IHateEclipse {
    private static Integer n;

    public static void main(String[] args) {
        whatItShouldBe(1);
        eclipseIsTheWorst(1);
    }

    private static void whatItShouldBe(Number someNumber) {
        if(someNumber instanceof Integer) {
            // I generate a warning
            n = n;
        }
    }

    private static void eclipseIsTheWorst(Number someNumber) {
        if(someNumber instanceof Integer) {
            // I do not
            n = (Integer) n;
        }
    }
}