Enter Java nested classes. The first time I laid eyes on these, I couldn’t imagine a single use for them that I wouldn’t prefer to implement some other way. Then I noticed something very ...

In Java, nested classes are categorized as either static member classes or inner ... The following code fragment shows how you would create an Ellipse2D object with a floating-point implementation: ...

In other words, a Java class that supports the SOLID open-closed principle will find use in originally un-envisioned scenarios, and be flexible enough to work with newly created classes, interfaces ...