Simple syntax question

Is this the best we to conditionally do something if str is NOT equal to
one, two, three, or four, AND mystr is NOT equal to X? I can't seem to
find anything like a str.unequal. I want the if block to execute if str
equals "seven" and mystr equals "Y"


if ( !(str.equals("one")) && !(str.equals("two")) &&
!(str.equals("three")) && !(str.equals("four")) &&
(mystr.compareTo("X") != 0) )
{

Then do this...


-Thanks

.