THE TUTORIAL LIBRARY
Java 2 added a new class to java.util called Arrays. This class provides various methods that are useful when working with arrays. Although these methods technically aren't part of
Read tutorialThe following is an example that demonstrates the power of a custom comparator. It implements the compare() method so that it operates in reverse of normal. Thus, it causes a tree
Read tutorialThe TreeMap class implements the Map interface by using a tree. A TreeMap provides an efficient means of storing key/value pairs in sorted order, and allows rapid retrieval. You sh
Read tutorialThe HashMap class uses a hash table to implement the Map interface. This allows the execution time of basic operations, such as get() and put(), to remain constant even for large s
Read tutorialBefore you can access a collection through an iterator, you must obtain one. Each of thecollection classes provides an iterator() method that returns an iterator to the start of th
Read tutorialTreeSet provides an implementation of the Set interface that uses a tree for storage. Objects are stored in sorted, ascending order. Access and retrieval times are quite fast, whic
Read tutorialA 3-D Secure transaction is performed immediately before a merchant performs a payment transaction, that is, Authorisation transaction in the Auth/Capture mode; and the Purchase tr
Read tutoriale-Payments are secure real time payments that transfer funds (via the Internet) between a consumer and the merchant's financial institutions. e-Payments require secure communicatio
Read tutorialHashSet extends AbstractSet and implements the Set interface. It creates a collection that uses a hash table for storage. As most readers likely know, a hash table stores informati
Read tutorialThe LinkedList class extends AbstractSequentialList and implements the List interface. It provides a linked-list data structure. It has the two constructors, shown here:
Read tutorialThe toRadians() method converts degrees to radians. toDegrees() converts radians to degrees. Here is a program that demonstrates toRadians() and toDegrees():
Read tutorialThe following program demonstrates getClass() (inherited from Object) and getSuperclass() (from Class):
Read tutorialOne example today. A better developer tomorrow.