Take Java's Calendar and DateFormat classes (but oddly not their GregorianCalendar and SimpleDateFormat classes). You can have any number of Calendars and DateFormats in a program.

Developers who create a runnable Java class, be it for a ‘Hello World’ demonstration or to kick off a fully featured enterprise application, will enjoy the following technical benefits when using ...

Method references: A primer My previous Java 101 tutorial introduced lambda expressions, which are used to define anonymous methods that can then be treated as instances of a functional interface.

For instance, if a lambda involves modifying parameters before a method call, replacing it with a method reference might obscure what’s happening, as in stream.map(x -> process(x).save()) versus ...

Must qualify the allocation with an enclosing instance of type GameTree (e.g. x.new A () where x is an instance of GameTree). GameTree.java line 146</pre> ...