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Object Oriented Programming Articles
Page 420 of 589
What are the key features of Java?
This article will help you understand what the key features of Java Programming language are. The Key features of Java Programming Language are − Java is Easy to Understand Java’s base is similar to that of C and C++ languages and it includes many important features of these languages. It removes many drawbacks and complexities of C or C++. So if one has good understanding of either C or C++, then Java language will be very familiar and easily understandable. Java is an object oriented programming language Object Oriented Programming (OOP) is an approach to standardize the programs by creating ...
Read MoreWhat is dot operator in Java?
This article will help you understand what a dot operator in Java Programming language is. Before jumping into Dot Operator, let us revise about Operators. OPERATORS In computer programming we often need to perform some arithmetical or logical operations. In such circumstances, we need operators to perform these tasks. Thus, an Operator is basically a symbol or token, which performs arithmetical or logical operations and gives us meaningful result. The values involved in the operation are called Operands. Here is a basic Pictorial representation of Operators. Now, let us discuss the types of Operators available. TYPES OF OPERATORS There ...
Read MoreAnonymous object in Java
Anonymous object in Java means creating an object without any reference variable. Generally, when creating an object in Java, you need to assign a name to the object. But the anonymous object in Java allows you to create an object without any name assigned to that object. So, if you want to create only one object in a class, then the anonymous object would be a good approach. Reading this article, you will learn what an anonymous object is and how to create and use anonymous objects in Java. Let's get started! Anonymous Object in Java Anonymous means Nameless. An ...
Read MoreDifferent methods to append a single character to a string or char array in Java
Have you ever faced the situation of extending a string or char array? If you haven't yet, you might probably encounter this situation in the future. It is a common practice to append a single character to a string or char array in Java. The significant difference between a string array and a char array is that a string array is a sequence of characters, and a char array is a sequence of collection of data type char. String array runs as a single entity, whereas char array runs as a separate entity. In this blog, we will look ...
Read MoreDifference between inheritance and composition in Java
In computer programming, the concept of reusable code refers to the utilisation of previously developed software in the construction of new software. Reusability of code is recognised as an essential component of productive functionality. Establishing associations between classes is one method that object-oriented programming uses to encourage this.In object-oriented programming, there are two primary ways to construct these relationships: inheritance and composition.In object-oriented programming (OOP), inheritance refers to the process through which an object can take on the properties of one or more other objects. In OOP, it is one of the most powerful concepts for establishing code reusability. When ...
Read MoreDifference between constructor and method in Java
Classes are the fundamental building blocks of Java. It is a programmable template that can be expanded upon, and it determines the form and characteristics of an item. One may say that a class is the most fundamental component of an object oriented programming language like Java. Each and every idea that will be put into action by means of a Java application must first be encased inside of a class. In object-oriented programming, the fundamental building blocks are called classes objects.Variables and methods are the building blocks of a Java class. Instance variables are the terms used to refer ...
Read MoreHow to add an image as label using JavaFX?
You can display a text element/image on the User Interface using the Label component. It is a not editable text control, mostly used to specify the purpose of other nodes in the application.In JavaFX you can create a label by instantiating the javafx.scene.control.Label class. To create a label, you need to instantiate this classYou can use a graphic object as a label using the setGraphic() method of the Label class (inherited from javafx.scene.control.Labeled class). This method accepts an object of the Node class representing a graphic (icon).Exampleimport javafx.application.Application; import javafx.scene.Group; import javafx.scene.Scene; import javafx.scene.control.Label; import javafx.scene.image.Image; import javafx.scene.image.ImageView; import javafx.scene.paint.Color; ...
Read MoreJava Program to Call One Constructor from another
In this article, we will understand how to call one constructor from another. The keyword 'this()' is used to invoke a constructor.Below is a demonstration of the same. We will displaying sum and product of two numbers while using this() −InputSuppose our input is −The numbers are defined as 12 and 30OutputThe desired output would be −The sum is: 42 The product is: 360AlgorithmStep 1 - START Step 2 - Declare an integer value namely my_sum Step 3 - In the main class, we define a ‘this’ reference to the numbers which would be used as input. Step 4 - This ...
Read MoreWhat happens if we try to extend a final class in java?
In Java final is the access modifier which can be used with a filed class and a method.When a method if final it cannot be overridden.When a variable is final its value cannot be modified further.When a class is finale it cannot be extended.Extending a final classWhen we try to extend a final class that will lead to a compilation error saying “cannot inherit from final SuperClass”ExampleIn the following Java program, we have a final class with name SuperClass and we are trying to inherent it from another class (SubClass).final class SuperClass{ public void display() { ...
Read Morefinal, finally and finalize in Java
The final keyword can be used with class method and variable. A final class cannot be inherited, a final method cannot be overridden and a final variable cannot be reassigned.The finally keyword is used to create a block of code that follows a try block. A finally block of code always executes, whether or not an exception has occurred. Using a finally block allows you to run any cleanup-type statements that you just wish to execute, despite what happens within the protected code.The finalize() method is used just before object is destroyed and can be called just prior to object ...
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