class java.util.ArrayList class java.util.LinkedList In this case, the implementation methods for ArrayList, LinkedList, ... A class can implement multiple interfaces.

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 ...

Over time, they will better understand which functions to group together in a single Java class, and which components to separate through an easily integrated interface. When you correctly balance ...