I've the following class:

public class IntegerKey extends Number implements Comparable<IntegerKey> { 
    private Integer m_key; 
    public IntegerKey(Integer key) { 
        m_key = key; 
    } 
    public IntegerKey(int key) { 
        m_key = key; 
    } 
}

I would like to use this class as Follow:

assume I have the following generics:

Map<IntegerKey, MyCache> map = new HashMap<IntegerKey, MyCache>(); 
map.put(5, new MyCache());

This doesn't compile, why?? I don't want to do:

map.put(newIntegerKey(5),newMyCache());

Thank you!