Class Arrays helps you avoid reinventing the wheel by providing
static methods for common array manipulations. These methods include sort for sorting an array (i.e., arranging elements into increasing order), binarySearch for searching an array (i.e., determining whether an array contains a specific value and, if so, where the value is located), equals for comparing arrays and fill for placing values into an array. These methods are overloaded for primitive-type arrays and for arrays of objects. Our focus in this section is on using the built-in capabilities provided by the Java API.
Figure E.19 uses
fill, and shows how to copy arrays with class
static arraycopy method ...