You don’t have to create any Book objects to call class methods ... or constructor. Java supports four access levels: private, public, protected, and package (the default).

Nested classes are classes that are declared as members of other classes or scopes. Nesting classes is one way to better organize your code. For example, say you have a non-nested class (also ...

there's a basic and often violated software design principle pertaining to Java method modifiers that is in need of explanation. A public method should never be called by another public method within ...

Imagine you are an expert object-oriented Java developer who meticulously crafts code the way an artist cares for their masterpiece. You believe clean code is an absolute necessity. Classes with clear ...