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Object Oriented Programming Articles
Page 381 of 589
What is Iterable Interface in Java?
In simple words, the iterable interface is a common interface that allows us to iterate over a collection of objects. It was first introduced with the release of JDK 1.5 and made available in 'java.lang' package. The Java Collection Framework extends this interface, hence all the classes available in this collection framework by default implement the iterable interface. In other words, the classes of collection framework such as ArrayList, TreeSet, TreeMap and HashMap are iterable. This article aims to explain the iterable interface of Java along with its use case. Iterable Interface in Java The only use case exhibited ...
Read MoreWhat is Interface Naming Conflicts in Java?
In Java, interfaces serve two purposes pure abstraction and multiple inheritance. Generally, an interface consists of abstract methods and variables that define the behavior which a class can implement. If we create two interfaces that contain methods and variables with the same name, then interface naming conflicts may arise. However, it is not the only scenario that can cause this conflict, we are going to explore all the possible situations causing interface naming conflicts. Interface Naming Conflicts in Java Before heading to the interface naming conflicts, it is necessary to understand the abstract methods and how to create interfaces in ...
Read MoreIs there any difference between int[] a and int a[] in Java?
Array is a linear data structure that is used to store a group of elements with similar datatypes. It stores data in a sequential manner. Once we create an array we can't change its size i.e. it is of fixed length. There are various ways to create an array named 'a[]' of type integer including 'int[] a' and 'int a[]'. But, the question that pops up here is that is there any difference between these two syntaxes and which one is preferable. Stick with us till the end of this article to find out the answer to these questions. How ...
Read MoreJava Program to Illustrates Use of Static Inner Class
Here, we will demonstrate the usage of static inner class using the Java program. Before diving deep into the topic, let us get acquainted with the term Static Inner Class . Static Inner Class An inner class is the one, which is defined within another class. A Static Inner Class is a nested class that is a static member of the outer class. Other static members can be used to access it without first instantiating the outer class. A static nested class lacks access to the instance variables and methods of the outer class, much like static member’s java. Example ...
Read MoreJava Program to illustrate the Usage of Hexadecimal
Here, the usage of Hexadecimal shall be demonstrated through the Java Program. Let us get acquainted with the term Hexadecimal before seeing a Java program. The Hexadecimal is a type of number system that has a base value of 16. There are 16 symbols representing hexadecimal numbers. These symbols or values are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, and F. Each digit represents a decimal value. The hexadecimal numbers from 0 to 9 are equivalent to decimal numbers from 0 to 9. Further, A represents 10, B represents 11, C represents ...
Read MoreJava Program to Illustrate the Availability of Default Constructor of the Super Class to the Sub Class by Default
Here, we will demonstrate the availability of the default constructor of the super class to the sub class by default through Java Program. Before diving deep into the topic, let us get acquainted with the term Constructor, Super class, and subclass. Constructor A special method in Java is considered for the initialization of an object. The name of the constructor is the same as the class name and it does not return anything. A default constructor is invoked by itself whenever an object is created using a new keyword. There are following three types of constructors in Java ...
Read MoreJava Program for array rotation
An array is a linear data structure that is used to store a group of elements with similar datatypes. It stores data in a sequential manner. Once we create an array we can't change its size i.e. it can store a fixed number of elements. The array comes with a vast application and use case. Also, we can perform numerous operations on arrays. This article will help you to understand the basics of arrays and also, we will make java programs to perform right and left rotation operations on arrays. Java Program for Array Rotation First, let's understand the term ...
Read MoreJava multiplyExact() in Math
In Java, multiplyExact() is an in-built static method of the Math class that accepts two arguments and returns their product as a result. This method can accept values of either integer or long type. One important point to note is that it may throw an exception if the produced result overflows the size of integer. After knowing the functionality of multiplyExact() in Java, one question that may pop into one's mind is that we can also use '*' operator to multiply two operands then why do we need multiplyExact() method. We are going to answer this question and also, explore ...
Read MoreIntUnaryOperator Interface in Java
IntUnaryOperator Interface, a functional interface of Java that performs an operation on a single integer-valued operand and also returns an integer value as a result. Since it is a functional interface, we can use it as an assignment target for the lambda expressions or method references. Here, the functional interface means an interface that contains only a single abstract method and exhibits single functionality. Some examples of functional interfaces are Predicate, Runnable, and Comparable interfaces. The IntUnaryOperator interface is defined in the 'java.util.function' package. In this article, we are going to explore the IntUnaryOperator Interface and its built-in methods with ...
Read MoreDifferent name reusing techniques in Java
In Java, there exist different name reusing techniques for various types of entities, sucha s variables, methods, datatypes or packages. These techniques affect the accessibility and behavior of the entities according to their need and use. In this article, we will discuss four common ways to reuse a name in Java: overriding, hiding, overloading and shadowing Name reusing techniques in Java Shadowing This technique allows a local variable to have the same name as another field or member of the enclosing class. In this case, the previous implementation of the member gets shadowed by the declaration of a new variable. ...
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