Difference: implements means you are using the elements of a Java Interface in your class. extends means that you are creating a subclass of the base class you are extending . You can only extend one class in your child class, but you can implement as many interfaces as you would like.
Read moreWhat does Extends mean in Java?
The extends keyword extends a class (indicates that a class is inherited from another class ). In Java, it is possible to inherit attributes and methods from one class to another. We group the “inheritance concept” into two categories: subclass (child) – the class that inherits from another class.
Read moreWhat is the purpose of new keyword?
New keyword in JavaScript is used to create an instance of an object that has a constructor function . On calling the constructor function with ‘new’ operator, the following actions are taken: A new empty object is created.
Read moreWhat does :: new mean in Java?
The new operator is used in Java to create new objects . It can also be used to create an array object. Let us first see the steps when creating an object from a class − Declaration − A variable declaration with a variable name with an object type. Instantiation − The ‘new’ keyword is used to create the object.
Read moreCan we use super in constructor in Java?
super() can be used to invoke immediate parent class constructor .
Read moreHow are this () and super () used with constructors?
How are this() and super() used with constructors? Constructors use this to refer to another constructor in the same class with a different parameter list . Constructors use super to invoke the superclass’s constructor. If a constructor uses super, it must use it in the first line; otherwise, the compiler will complain.
Read moreWhat is a superclass in Java?
In Java, the superclass, also known as the parent class , is the class from which a child class (or a subclass) inherits its constructors, methods, and attributes . For instance, in our above example, BankAccount was the superclass from which our subclass SavingsAccount inherited its values.
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