Classes, fields, methods, constructors, and objects are the building blocks of object-based Java applications. This Java tutorial teaches you how to declare classes, describe attributes via fields ...

If you call "Calendar.getInstance()", you could be getting an instance of an object that is a Calendar or a descendant of Calendar. It could be a ...

In Java, the instanceof operator is used for type checking to determine if an object is an instance of a specific class, interface, or a subclass. Its syntax is object instanceof ClassName.

Of course, Java object serialization is only half of the job. The other half is Java object deserializtion, which we accomplish with the FileInputStream and the ObjectInputStream. The first step to ...

If you are calling a method on an existing object, you can use object::method rather than x -> object.method(x). Next, we’ll consider a more complex scenario for instance method references.

That means instance variables are assigned as follows: Values for boolean are initialized to false. Values for floats and doubles are initialized to 0.0. Values for byte, short, int and long ...