The following information was included in this chapter:
discussion of the Object class, which is the most fundamental class in Java
discussion of the wrapper classes, which not only allow primitive values to be treated as objects, but also contain useful methods for converting values
discussion of the Math class, which provides an assortment of mathematical functions
discussion of the String class, showing how immutable strings are created and used
discussion of the StringBuffer class, showing how dynamic string buffers are created and manipulated