For example, a Java program obtains file I/O (input ... to save and restore the data items in that class’s objects. To implement an interface, it is not sufficient to specify only an implements ...

Any method you can conjure up takes an object and returns an object that fulfills the Java Function contract. For this Java Function interface example, we will provide a single method named “apply” ...

Quite often a Java Stream or other component needs an object passed to it in order ... which is where functional interfaces really shine. Here is the functional Consumer interface example implemented ...

Although Java lacks a true sizeof() equivalent, the Instrumentation interface introduced ... Build up some sample objects and throw them at the Instrumentation example. * * Might run this class ...

This is the “Integrated Development Environment” or IDE: the interface ... is Object Oriented Programming? Of course, there is much more to learn! Stay tuned for the next Java tutorial ...