Frame Class in Java

Switch Case Java

With the help of the Java programming language's switch case statements, programmers can easily build complicated decision-making logic. In this section, we'll look at the syntax of switch case statements, discuss why they're better than if-else statements, and give some usage examples. Syntax The basic syntax of switch...

6 min read

Quick Sort in Java

Quick sort is a sorting algorithm that uses the divide and conquer technique. It picks a pivot element and puts it in the appropriate place in the sorted array. Divide and conquer is a technique of breaking down the algorithms into subproblems, then solving the subproblems,...

8 min read

How to create an instance of abstract class in Java

This article aims to explain how to create an instance of an abstract class in Java. We will look at the different ways to create an instance of an abstract class and the pros and cons of each approach. We will also discuss the importance of...

6 min read

Sort An Array According To The Set Bits Count in Java

An array containing natural numbers is given to us. Our task is to sort the input array as per the number of set bits in the binary representation of the elements present in the input array. That is, a number that has a greater number of...

9 min read

How to Create Test Cases for Exceptions in Java

In Java, creating test cases for exceptions is not a difficult task. The JUnit testing tool of Java provides a way to track the exception handling of code. We can write the test cases to check whether the code throws a desired exception or not. In order...

4 min read

Java CORS Error

Web browsers ent websites from making requests to a domain other than the one that hosted the original website by utilizing a security feature known as CORS (Cross-Origin Resource Sharing). By limiting web apps to only interact with resources from their origin unless specifically permitted by...

2 min read

Convert String to Map in Java

Handling key-value-based data is a common requirement in various Java applications. Often, data arrives as Strings or String arrays, and it becomes essential to convert them into Maps for efficient processing. In the same context, Map provide an easy way to access and manipulate data with...

5 min read

Reverse String with Special Characters in Java

If you're given a string that has both an alphabet (from "a" to "z" as well as "A" to "Z") as well as a special character, you need to reverse the string without changing the special character. Example: Input: s = "j,s$v" Output: s = "v,s$j" Take note that neither...

6 min read

Structure of Java Program

Java is an object-oriented programming, platform-independent, and secure programming language that makes it popular. Using the Java programming language, we can develop a wide variety of applications. To make Java handy So, before diving in depth, it is necessary to understand the basic structure of Java program in detail. Let's see which elements...

6 min read

Kahn's algorithm for Topological Sorting in Java

Kahn's algorithm is a popular method used to perform topological sorting on a directed acyclic graph (DAG). Topological sorting is ordering the vertices in a DAG, such that for every directed edge (u, v), vertex u comes before vertex v in the ordering. In other words,...

8 min read