Interface methods are implicitly abstract ... As an example, the Java Collections Framework includes the AbstractList class, which uses the state of variables. In cases where you don’t need ...

The Java Iterator is an all-purpose interface that simplifies looping through a collection of objects. Java's ListIterator provides all the functionality of the Iterator interface, with four ...

Many new APIs use JCF’s container interfaces to provide ... the wrapper classes with static factory methods similar to the already existing java.util.Collections class. Of course, the solution ...