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Articles tagged with #java
List Interface is Used to store ordered values. duplicate value can be stored. it is a child interface of collection. 1. Adding Elements public class Program1 { public static void main(String[] args) { /* List can not be instantiated ...
A nested class doesn't have any name is Known as anonymous inner class. anonymous inner class can be used in two ways for overriding purpose If the purpose of class is only to override method ex: purpose of creating B class to override fun1 in t...
Lambda expression provide implementation of functional interface (interface that has only one abstract method). it's treated as function . @FunctionalInterface interface Button2{ public void onclick(String name, int i1); } @FunctionalInterfa...
Singleton class is a class that can have only one instance. if you create new instance it will also points to first instance. to design singleton class make constructor as private write static function that return object of singleton class class S...
Bounded type parameters allow you to set restrictions on generic type arguments Declare a bounded type parameter syntax T can only be replaced with super class Name or it's subclass ,For Example: This class only accepts type parameters as any cla...
it is used to deal with abstract data types .This is implemented for different data types. Generic interfaces are specified just like generic classes. For example : // T and X is type parameter interface Fruit <T, X>{ T name(T data ); X getTe...