Marker interface in java is a interfaces with no fields or methods. In simple words, empty interface is called marker interface. Example of marker interface is Serializable, Clonnable and Remote interface. Marker interface is also called tag interface in java. Declaring marker interface: public int...
As discussed above, an interface can not implement another interface. It has to extend the other interface. See the below example where we have two interfaces Inf1 and Inf2. Inf2 extends Inf1 so If class implements the Inf2 it has to provide implementation of all the methods of interfaces...
One example of inner interface used in java standard library is java.util.Map and Java.util.Map.Entry. Here java.util.Map is used also as a namespace. Entry does not belong to the global scope, which means there are many other entities that are Entries and are not necessary Map's entr...
Then let’s start with basicdefinitionof a Java Interface We will go over the same with multipleexamples. What is an Interface inJava? What is an interface in java withrealtimeexample? Why use an interface in java Interface Design Java Mostcommoninterview questions on Interface Interface fundamen...
For example, in order to define the Shape interface, we write interface Shape { double area(); double circumference(); } The complete Example is as shown below interfaceShape { doublearea();// area method declaration doublecircumference();// circumference method declaration ...
Java Comparable interface Example The example below shows how to implement the Comparable interface in a user defined class and define the compareTo() method to make the objects of that class comparable. import java.time.LocalDate; import java.util.Objects; class Employee implements Comparable<Emplo...
Learn about the ThreadFactory interface in Java, its purpose, and see practical examples of how to implement it effectively.
interface is fairly simple. The only requirements are the class declaration and the implementation of theget()method. Within theget()method, theRandomclass from Java’s util package is used to generate the random digit, but that’s about as complicated as t...
Java Generics Example Generics was added in Java 5 to providecompile-time type checkingand removing risk ofClassCastExceptionthat was common while working with collection classes. The whole collection framework was re-written to use generics for type-safety. Let’s see how generics help us using ...
This simple piece of code is polymorphic, which means that it works foranyCollectionregardless of implementation. This example demonstrates how easy it is to write a polymorphic algorithm using the Java Collections Framework. Collection Interface Bulk Operations ...