Class Employee extends Person

A constructor in Java is a special method that is used to initialize objects . The constructor is called when an object of a class is created.

To prevent inheritance, use the keyword “final” when creating the class . The designers of the String class realized that it was not a candidate for inheritance and have prevented it from being extended.

Person: An example user defined class[1] [top] The first two could be represented by two Java String variables and the last one by a Java int. That’s three variables to represent one person. By defining a Java class, Person, we can create one variable to represent a Person . Syntax: public class Person { }

The idea behind inheritance in Java is that you can create new classes that are built upon existing classes . When you inherit from an existing class, you can reuse methods and fields of the parent class. Moreover, you can add new methods and fields in your current class also.