Both the Java interface and abstract class contain abstract methods. An abstract method is nothing but a method without body and is terminated with a semicolon. Let us know the differences between an Interface and Abstract class in this Last Minute Java Tutorial.
Java 1.8 or Java 8 introduced new features in Interface namely STATIC method and Java DEFAULT method. These are against the concept of an interface is a 100% abstract class. Let us know more with examples in this Last Minute Java Tutorial.
Note: The keyword "default" is also used with SWITCH CASE control statements.
Java Interface is nothing but a 100% abstract class and the keyword used to define it is the "interface". Interfaces simply declare all the abstract methods which are to be implemented by the implementing class. Let us know more about interfaces in this Last Minute Java Tutorial.
A Java Abstract Class is nothing but a class with one or more unimplemented methods. These incomplete methods should be implemented by the first Concrete subclass of an abstract class. Let us know more about Abstract Classes in this Last Minute Java Tutorial.
Note: A concrete class is any Java class that defines all methods for readymade use. Objects of a concrete class can be created using the keyword "new".
Java Inheritance allows inheriting the methods and properties of a Superclass into a Subclass. Java Method Overriding is nothing but writing a method in a Subclass with the same method signature of the Superclass so that the Java Runtime invokes the method in the subclass.
As Java is an Object Oriented Programming (OOP) language, it supports Inheritance. Inheritance is a process of acquiring Methods and Properties of an existing class into a custom class written by us so that all the inherited code becomes part of our custom Class.
Java Varargs refer to Variable Arguments. Java Varargs are applicable only for Constructors and Methods. Let us know more in this Last Minute Java Tutorial.
Java command line arguments are nothing but the data passed to the Main method of a Java Class at the time of running the Java Program. This data will be in the form of Strings or a group of characters separated by spaces in general. Let us know more about passing command-line arguments to a Java program using CMD or Eclipse IDE tool.
Java programming language supports Recursion. Recursion is a process of calling the same method from within the method. It is achieved only with methods. Let us know more about Java Recursion using this Last Minute Java tutorial.
Java Method Overloading is nothing but the ability to write more than one Method with the same name in a Class with varying Return-Types or Parameters. In other words, you should maintain unique method signatures for all methods with the same name to successfully Overload. Let us know more about Method Overloading in this Last Minute Java Tutorial.
