Matlab java interop. Use enum values

Hello!

I have java enum

package com.moc;
public enum MyType {
    s,
    q,
    p,
    none,
}

In matlab(2012a) I load appropriate jar, and set

a = com.moc.MyType.q;
a = com.moc.MyType.none;

It works as well. But when i try to eval

a = com.moc.MyType.s;

or

a = com.moc.MyType.p;

I get an exception

The class com.moc.MyType has no property or method named 's'.

and

The class com.moc.MyType has no property or method named 'p'.

Why did matlab disallow me to get 's' and 'p' enum values?

Thank you

P.S.

a = com.moc.MyType.q;
a.getClass.getDeclaredField('p')

returns

public static final com.moc.MyType com.moc.MyType.p