The primitive types in Java are boolean ... This avoids both the memory and performance overhead of object creation. Besides the actual wrapper types, other classes in the class libraries take ...

That’s because every time we create an object in Java, an object reference is created in Java’s memory heap. This lets us modify objects using their reference variables. See my InfoWorld ...

Java provides a way for the programmer to exercise control over memory management by marking certain objects as expendable via reference objects. Should an application’s memory requirements ...

Classes, fields, methods, constructors, and objects are the building blocks of object-based Java applications ... You don’t have to create any Book objects to call class methods.

It contains no explicitly defined Java constructors. When no explicitly defined constructors exist, Java's virtual machine makes object creation possible by providing a default constructor to ...