Advantages and Disadvantages of Abstraction in Java

Abstraction involves hiding the complex features of a system and showing only the essential features, making it easier to understand by the user. Java abstraction has various advantages and disadvantages that will be covered in this article. Advantages of Abstraction in Java Increasing Understandability of the Code Abstraction is a technique that makes it easier to understand complex systems by converting the complete code into relatively smaller parts that can be managed & understood easily. Since we are hiding the

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Advantages and Disadvantages of Encapsulation in Java

The word “Encapsulation” means that closing something like we put the main power of the tablet inside the capsule. It is a mechanism that is done to bind the data and protect it from being used by everyone. After doing encapsulation, the variables and the data of one class cannot be used in another class and this data can be used by the member functions of the same class. Encapsulation can be achieved by adding the private specifier to the

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Solved Error: cannot be cast to java.lang.Comparable

This article will look at how to solve the above-given Class Cast Exception. This ClassCast Exception occurs at runtime when we improperly typecast an object of a class to a related class of which it is not an instance. Now, what does it mean when the exception says: cannot be cast to java.lang.Comparable. Let us first have a brief look at what is Comparable. We use Comparable Interface mainly when we need to sort an Array of Custom Objects. In

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Java Program for Employee Details using Class and Object

In this article, we will talk about the Java program for employee details using class and object. An Employee is a person or also be referred to as an entity that consists of various attributes such as – emp_id, emp_name, emp_salary, emp_department, emp_email, emp_address, and many more. We use the getter (to receive Employee details) and setter (to set Employee details) method in this program. In the main class, we will create an object of the EmployeeDetails class and with

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Advantages and Disadvantages of Inheritance in Java

Inheritance is one of the pillars of the Java programming language. Learning OOP (Object Oriented Programming) without knowing and understanding the concept of Inheritance, its pros and cons are incomplete. Inheritance is a process in which a class acquires all the data members and its parent class methods. The basic idea behind it is that you create new classes based on the existing classes with additional data and methods. Example:

In the above example, there are two classes SuperHello

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Solve Error “the import org.apache cannot be resolved” in Java

How can you resolve the import org.apache error from your program? Nowadays, when developers are preparing some codes in Java, the common error is import org.apache error takes a lot of time to resolve. This is because of the minor mistake you may do while coding, and no apache library is installed on them. Apache library is crucial for coding on Java and requires several corrections to develop a program efficiently. Most developers face this common issue in their developing

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Hill Cipher in Java [Encryption and Decryption]

Here you will learn about hill cipher in java with program and algorithm. To start with the program directly is not a good idea here. Until you don’t have a brief understanding of Hill cipher algorithm, their programs will merely a code to copy paste. As per Wikipedia, Hill cipher is a polygraphic substitution cipher based on linear algebra, invented by Lester S. Hill in 1929. Basically Hill cipher is a cryptography algorithm to encrypt and decrypt data to ensure data security. Also Read: Caesar Cipher in

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Java Program for Shortest Job First (SJF) Scheduling [Preemptive & Non-Preemptive]

Here you will get java program for shortest job first (sjf) scheduling algorithm, both preemptive and non-preemptive. Shortest job first scheduling algorithm can also be known as shortest job next scheduling. It is very easy to implement and efficient in reducing average response time. Now we will see how it will work with the example and its implementation. In shortest job first, we should know the execution time of each process before running. This we can estimate in many ways.

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