Wrappers for Primitives
lItems in a OpenList must be Objects.
l
lPrimitives (ints, longs, floats, doubles, chars É) are not Objects in Java.

lThe constructor Long( ) makes an Object for any long by creating a ÒwrapperÓ which is an object.

lOther wrappers: Integer(), Float(), Double(), Boolean(), Snoop, Ice-T, ...