Employee Management System with core Java

Introduction The Employee Management System will manage employee records, including features to add, update, delete, and display employees. It will use Java 8 features like Lambda expressions, streams, and the Observer design pattern. Part 1: Requirement Gathering and Feature Discussion Read More …

Simple Banking System Using Core Java

Introduction The Simple Banking System will manage customer bank accounts, including features to create accounts, deposit money, withdraw money, and view account details. This project covers Java fundamentals like classes, inheritance, and exception handling. Part 1: Requirement Gathering and Feature Read More …

Library Management System

Introduction The Library Management System will help students manage books in a library. It will include features to add, view, update, and delete books. This project covers Java fundamentals like classes, methods, lists, and basic file I/O. Part 1: Requirement Read More …

Student Management System Using Code Java

Let’s create a comprehensive Java project for class 10 & 12 students that covers core Java concepts and features. We’ll develop a simple “Student Management System” which can manage student records, including adding, viewing, and deleting student information. This project Read More …

Understanding Hashing: Hash Tables and Hash Functions

Introduction Hashing is a fundamental concept in computer science used to efficiently map data of arbitrary size to fixed-size values, known as hash values or hash codes. This process involves the use of hash functions and hash tables, which enable Read More …

Understanding Binary Search: A Step-by-Step Guide

Introduction Binary Search is a fundamental algorithm in computer science, widely used due to its efficiency in finding elements in a sorted array. Unlike linear search, which checks each element sequentially, binary search divides the search interval in half repeatedly, Read More …

Backend Code Design Discussion

Explore the intricacies of our backend code design as we delve into the architecture, services, and key components shaping the foundation of our system. Join us for a focused discussion on the elegance, scalability, and efficiency embedded in our backend Read More …

Building a Java Application with MyBatis and PostgreSQL Integration

Overview This tutorial provides a detailed walkthrough of building a Java application that interacts with a PostgreSQL database using the MyBatis persistence framework. The tutorial covers setting up the project, creating MyBatis mapper interfaces and XML configurations, and implementing a Read More …

Java Program For Student

Average of three number Calculate Area of a Circle Factorial Calculation Check if a Number is Prime Fibonacci Series Palindrome Check Sum of Digits Matrix Addition Reverse a String Armstrong Number Check Binary to Decimal Conversion Factorial using Recursion Check Read More …

Binary Search Algorithm in Java (Student)

Introduction Binary search is a more efficient search algorithm compared to linear search, especially for sorted arrays. It divides the array into two halves and eliminates half of the remaining elements at each step. Java Code Explanation: This program demonstrates Read More …

Linear Search Algorithm Implementation in Java (Student)

Overview Linear search is a simple searching algorithm that iterates through the elements of a list or array in a linear manner to find a specific value. It is straightforward but may not be the most efficient for large datasets. Read More …

Java Sorting Program for Student

Introduction A sorting algorithm is a step-by-step method used to arrange a list of items in a specific order. One common sorting algorithm is the ‘Bubble Sort.’ In Bubble Sort, the algorithm compares adjacent elements in the list and swaps Read More …

Java Interview Program Example(s)

Introduction This blog contains information related to interview coding problems implemented using Java programming language. Please find the examples below – This program helps to find the Duplicate records from a given Integer Array.

Google Java Code Formatter for IntelliJ IDEA

Google Java Code Formatter is a tool that helps you format your Java code according to the Google Java Style Guide. If you want to configure it in IntelliJ IDEA, you can follow these steps: Now, IntelliJ IDEA should format Read More …

Spring Boot and React JS TODO Application

TODO Application Overview This proof of concept application helps to learn Spring Boot and React JS technologies. The user will be able to perform given action items – Creating a complete todo application with Spring Boot (for backend) and React.js Read More …

How does a Java Microservice and .NET Microservice can talk with teach?

Java microservices and .NET microservices can communicate with each other using various methods, such as: Overall, the choice of communication method depends on factors such as the nature of the application, system requirements, performance considerations, and the available tooling and Read More …

How to install filebeat agent on docker container

To install Filebeat on a Docker container and use it as an agent for forwarding logs to an Elasticsearch or Logstash server, you can follow these steps: That’s it! Filebeat should now be running within your Docker container and forwarding Read More …

GRPC Overview

The gRPC (gRPC Remote Procedure Calls) is an open-source remote procedure call (RPC) framework developed by Google. It enables efficient communication between different applications running on various platforms and environments by using protocol buffers (protobuf) as the interface definition language. Read More …

How do you ensure that Microservices are scalable and resilient?

Ensuring scalability and resilience in microservices architecture involves implementing certain best practices and employing specific techniques. Here are some key considerations to help achieve scalability and resilience: By applying these principles and techniques, you can enhance the scalability and resilience Read More …

How to handle service discovery and registration in a Microservices architecture?

In a Microservices architecture, service discovery and registration are essential components for enabling communication between services. The primary goal is to allow services to locate and connect with each other dynamically, without hard-coding specific endpoints or configurations. Here are some Read More …

How to handle deployments and rollbacks in a Microservices architecture?

In a Microservices architecture, managing deployments and rollbacks can be challenging due to the distributed nature of the system. However, with proper planning and the right tools, you can handle deployments and rollbacks effectively. Here are some best practices to Read More …

How to handle service communication and data sharing in a Microservices architecture?

In a Microservices architecture, service communication and data sharing are critical aspects that need to be carefully designed and implemented. Here are some approaches and best practices for handling service communication and data sharing in a Microservices architecture: Remember that Read More …

Advantages & Disadvantages of Microservices Architecture

Microservice architecture is an approach to software development where an application is broken down into smaller, loosely-coupled services, each independently deployable and manageable. While microservices offer several advantages, they also come with some challenges. Here are the pros and cons Read More …

How to monitor and troubleshoot Microservices?

Monitoring and troubleshooting microservices can be challenging due to their distributed nature. However, there are several best practices and tools available to help you effectively monitor and troubleshoot microservices. Here’s a step-by-step guide: Remember, monitoring and troubleshooting microservices is an Read More …

How to handle service versioning and backward compatibility in a Microservices architecture?

Handling service versioning and backward compatibility in a Microservices architecture is crucial to ensure smooth evolution and maintenance of your system. Here are some best practices for managing service versioning and backward compatibility: By following these practices, you can effectively Read More …

How to handle service governance and lifecycle management in a Microservices architecture?

Handling service governance and lifecycle management in a microservices architecture involves implementing various practices and tools to ensure effective management, scalability, and maintainability of the services. Here are some key steps and considerations: Remember, microservices governance and lifecycle management are Read More …

How to handle service resiliency in case of failures?

Handling service resiliency in case of failures involves implementing strategies and best practices to ensure that your system can recover from failures and continue operating with minimal disruption. Here are some key approaches to consider: Remember that the specific strategies Read More …

Is java technologies dying?

No, Java technologies are not dying. Java continues to be one of the most widely used programming languages and is still heavily utilized in various domains, including enterprise software development, Android app development, and large-scale web applications. It has a Read More …

Can you Explain Event-Driven pattern and how is it used in Microservices architecture?

Event Drive Architecture Pattern Certainly! The Event-Driven pattern is a software design pattern that emphasizes the production, detection, and consumption of events. An event can be defined as a change in the state of a system or an occurrence of Read More …

Can you Explain Sidecar pattern and how is it used in Microservices architecture?

Sidecar Pattern The Sidecar pattern is a design pattern used in the context of microservices architecture to enhance the functionality of a service without modifying its code. It involves attaching an additional container, known as the sidecar, to the main Read More …

How to prepare a RFP Document and proposals

Introduction ABC Pvt Ltd is seeking proposals from qualified vendors to provide a comprehensive digital healthcare system. We aim to enhance our healthcare services and streamline processes by adopting advanced digital solutions. This RFP outlines our requirements and expectations for Read More …

What are the difference between Springboot and Springboot Cloud?

Spring Boot and Spring Cloud are related but distinct frameworks within the broader Spring ecosystem. Here are the key differences between Spring Boot and Spring Cloud: In summary, Spring Boot is focused on simplifying the development of standalone Spring applications, Read More …

What is Swagger?

Swagger is an open-source software framework that helps developers design, build, document, and consume RESTful web services. It provides a set of tools and specifications for creating and working with APIs (Application Programming Interfaces). At its core, Swagger is a Read More …

What is Spring data ?

Spring Data is a project within the larger Spring Framework ecosystem that aims to simplify the development of data access layers in Java applications. It provides a consistent and unified API for interacting with different data storage systems, such as Read More …

How to analyze software application production issues?

Analyzing software application production issues requires a systematic approach to identify, isolate, and resolve the problems. Here’s a step-by-step guide on how to analyze software application production issues: Remember, software application production issues can be complex and may require iterative Read More …

How to analyze software application performance issues?

Analyzing software application performance issues typically involves a systematic approach to identify and resolve performance bottlenecks. Here’s a general step-by-step process for analyzing software application performance issues: Remember that performance analysis is an iterative process, and it may require multiple Read More …

Difference Between Springboot and Quarkus?

Introduction Spring Boot and Quarkus are both popular frameworks used for developing Java applications. While they serve similar purposes, there are some key differences between them: In summary, Spring Boot is a mature and widely adopted framework with extensive features Read More …

Quarkus Database Connectivity Example

Sure! Quarkus is a popular Java framework for building cloud-native applications, and it provides excellent support for database connectivity. Here’s an example of how you can connect to a PostgreSQL database using Quarkus: Add the necessary dependencies to your project’s Read More …

Sample Project Using Quarkus Framework

Certainly! Here’s a step-by-step example of creating a simple Quarkus application: Step 1: Set up your development environment Step 2: Create a new Quarkus project Step 3: Open the project in your IDE Step 4: Implement the REST resource Step Read More …

What is Quarkus?

Introduction Quarkus is a framework for building cloud-native, lightweight, and efficient Java applications. It is designed to optimize Java applications for containerized environments, serverless architectures, and Kubernetes. Quarkus aims to provide fast startup times, low memory usage, and high throughput, Read More …

Hospital Management System application development code using springboot microservice and mongo database

Introduction This document helps our developer to understand and start developing springBoot and MongoDB-based applications. This is a very simple project and users can copy and extend it. Here’s an example of how you can develop a Hospital Management System Read More …

Serverless implementation using Springboot

Introduction We can provide you with an example of a Serverless architecture using Spring Boot. In this example, we’ll create a simple RESTful API using Spring Boot and deploy it to AWS Lambda using the Serverless Framework. Here are the Read More …

How to write a spring batch program?

To write a Spring Batch program, you’ll need to follow a series of steps. Here’s a general outline of the process: Step 1: Set up the project Step 2: Define the Job Step 3: Define the Steps Step 4: Define Read More …

Realtime Project Code From GitHub Repository

Introduction Hello Friends, Welcome to knowledgeWala.com.This blog contains all information related to various project ideas and source code available in the GitHub Repository. The user has to create an account in GitHub to get the benefits of open source code. Read More …

Code Peer Review Checklist

The code peer review is an important process in the software development life cycle. It should be implemented and followed properly.This Video blog helps our development team to prepare and use a code peer review checklist to streamline the code Read More …

Java Stream Creation Code Example

This Java Program helps to create Stream from various collections like List, Set, Array, etc. This Java Program helps to understand the way the Java Stream process can be processed. The developer can generate a Stream process from a Collection Read More …

Online Pet Store and Services Ltd.

Introduction Welcome to Online Pet Store and Services Ltd.  This business plan is to get and prepare detailed information about the “OPSS” Application. The OPSS business helps customers to utilize the various services by just clicking on the mouse using Read More …

Programing Practical Assignment

This tutorial consists of important Programming Practical Assignment which can be used in academic assignment as well in the work environment. These assignments problems are collected from various sources and implemented by KW Team. Please add your assignment in the Read More …

LIST OF JAVA PROGRAMS For Student

Introduction This tutorial contains a variety of Java Program which is more useful for the student of 10th and 12th. The student will get the full program code developed using the eclipse IDE. Also, the student can copy the program Read More …

Java Program to Encoding a word into Pig Latin

Introduction This program helps to encode an input word to Pig Latin. Pig Latin is a way to encode a word. A Pig Latin is an encrypted word in English, which is generated by doing the following alterations: The first Read More …

Java Program – Check two strings are Anagram

Introduction The Two string will be anagram to each other if and only if they contain the same number of characters (order of the characters doesn’t matter). We have written this program using Java technologies, please find the code in Read More …

Java Program to reverse a Map Key to Value and Value to Key

Introduction This program helps to reverse Key to Value and Value to Key for a Map Data Structure. There are various ways to write the program and the KW team will prepare a program using a few of them. Please Read More …

Java Program – Pick the Element by interval from the List

Introduction This program helps to retrieve a list of the objects from another list of objects based on initial index value and Interval. This is a very common requirement when a developer wants to generate the sample report from a Read More …

Java Certified Enterprise Architect (SCEA) Sample Questions

Introduction This document contains a questions with answers related to Java Enterprise Architecture Exam. Please go through the docs below and let us know your feedback. These are sample questions to understand the exam pattern. As per our understanding, Everyone Read More …

Difference Between Java and Python

Introduction There are plenty of software programming languages available right now. It is a challenging task to compare one programming language with the other. Every programming language has its own pros and cons. Many developers faced problem while selecting the Read More …

The Best Practice to Solve a Problem

Introduction There are various ways to solve a problem. All ideas need some set of predefined steps to follow. Also, it is really critical to document all step to get the proper solution with an efficient fashion.As per our opinion, Read More …

Java Program – Compare Text File(s) to Check duplicate Content

Introduction This program helps to read multiple files from the system and compare the contents to check the duplicate records. This is a sample program written using Java Programming language. We used a very simple algorithm so everyone can understand Read More …

Java Program – Reshuffle the Objects in the List Randomly

Introduction This Program helps to reshuffle the list of object randomly so the developer can get the different results on each and every execution of the Program. It is very useful when the client wants some report which picks the Read More …

IBM Cúram Batch execution through eclipse

Introduction IBM Cúram Batch process execute as a standalone process and complete the job without impacting the online application. The developer can use any batch scheduler to schedule the IBM Cúram Batch job. All Batches will use the transactional (Same Read More …

Java Program – Quadratic Equation Solution Application

Introduction This Java Application helps to find out the value of X for a quadratic equation using the Shridharacharya formula. Sridhar Acharya (c. 870, India – c. 930 India) was an Indian mathematician, Sanskrit pundit andphilosopher. He was born in Read More …

Java Comparator Example

Introduction The Java Comparator class helps to understand how a comparator implemented in Java programming language. This program has Reporter class which and the object of this class will be used to sort by age. Please find the entire program Read More …

Java Swing – Fahrenheit to Celsius Conversion Application

Introduction This Java Swing Program helps to convert Fahrenheit to Celsius. The user has to enter the Fahrenheit and hit the enter button to allow the program to convert to Celsius.   Program Code KWFahrenheitApp.java   package com.kw.javaswing; import javax.swing.JFrame; Read More …

Java Swing Program to generate Jtable with Add, Delete & Update Operation

Introduction The Java Swing is very important Programming skills nowadays as it helps Developer to develop Java Program with GUI. This Java Swing Program helps to generate JTable. The user will add, update & delete the contents of the Table. Read More …

Java – Calendar Generator App Project using Core Java

Introduction This Application helps to generate Calendar from January to December for any year which user want to generate. The user can generate calendar for the past as well for the future. There are no restrictions to generate the Calendar Read More …

Automate Build Script – From SVN Download To Ant Target

  Introduction There is a huge and painful job when the project is big and required a lot of ant target to be executed to build the project. IBM Cúram is also a very big project and required to execute Read More …

Eclipse : Set Java File Format And Set Font Size

Introduction Eclipse is very popular IDE (Integrated Development Environment) tool which used by more than 80% of Java/J2ee developer in across the world. There are many functionalities which developer can set so it can benefit while developing a project. Every Read More …

Java Program to Send Mail

Introduction This Program will help to send mail to others using Java Program. The Develop can use this  program to build an application or APP which can send notification when any action happened like task assignment, task removal, comment on Read More …

Abstract Factory Design Pattern & Implementation Using Java

Introduction The Abstract Design Pattern is a creational Design Pattern and used to create Family of Objects. The abstract design pattern is very important to design pattern and used in a situation where the user wants to create a family Read More …

Java Program to add and display address From Address Book

Introduction This Java Program will help to add and display address from the Address Book. It is just a simple java program which helps to understand Java Technology. There may be many different ways to write a program and we Read More …

Eclipse: Update variable value in debug perspective at runtime

Introduction This is a common question asked by many developers to update the value of the variable at runtime in eclipse. This article will help to explain possible ways to update the variable values at runtime. It was a long Read More …

Java Program to Read Specific Content From File(s) OR Folder

  Introduction This program helps to read any specific Text or Contents from the file or multiple files from the folder location. This program can be used when we want to search any specific records like – There are specific Read More …

Software Engineer Interview Questions for entry and Mid Level – Part3

Introduction This post will have most important interview questions which used to ask in most of the reputed companies like Google, Amazon, NetApp, Wells Fargo, Wipro, Infosys, TCS, SAP etc. We are just adding Questions to this post and the Read More …

Software Engineer Interview Questions for entry and Mid Level – Part2

Introduction This post will have most important interview questions which used to ask in most of the reputed companies like Google, Amazon, NetApp, Wells Fargo, Wipro, Infosys, TCS, SAP etc. We are just adding Questions to this post and the Read More …

Software Engineer Interview Questions for entry and Mid Level – Part1

Introduction This post will have most important interview questions which used to ask in most of the reputed companies like Google, Amazon, NetApp, Wells Fargo, Wipro, Infosys, TCS, SAP etc. We are just adding Questions to this post and the Read More …

Programing/Coding Interview Questions

Introduction This post will have most important interview Coding and analytics questions which used to ask in most of the reputed companies like Google, Amazon, NetApp, Wells Fargo etc. We are just adding Questions to this post and the technical Read More …

Interview Questions for Experience Software Engineer

Introduction This post will have most important interview questions which used to ask in most of the reputed companies like Google, Amazon, Net App, Wells Fargo etc. We are just adding Questions to this post and the technical reader will Read More …

Java Program to Read Specific contain from Files

Introduction This program helps us to verify and retrieve some information based on specific text available in the file. it will verify text against the file and will retrieve next few lines of information from the same type of files Read More …

Java DB Setup with Example

Introduction Sun Microsystems recently announced that it is distributing and supporting Java DB based on the 100 percent Java technology, open-source Apache Derby database. Derby was previously available under its earlier name, Cloudscape, from its former owners: Cloudscape, Informix, and IBM. IBM Read More …

Java Program to find frequency of every digit in a number

Introduction This program helps to retrieve Frequency of the digits from provided number. Like number 52458 is having below frequency: Digit Frequency 2 1 4 1 5 2 8 1   FlowChart Please find the flowchart of program below – Read More …

Java Program to check for Automorphic Number

  Introduction This program helps to check that entered number is a Automorphic Number or not. In mathematics an automorphic number (sometimes referred to as a circular number) is a number whose square “ends” in the same digits as the Read More …

Java program to check Special 2 Digit Number

  Introduction This program helps to check whether it is special two Digit number or not. Special Two Digit Number are number for which sum of it’s  sum of it’s digits and product of it’s digits is equal to the Read More …

Java Program to check Fibonacci Series

Introduction In mathematics, the Fibonacci numbers are the numbers in the following integer sequence, called the Fibonacci sequence, and characterized by the fact that every number after the first two is the sum of the two preceding ones. Example: 0,1,1,2,3,5,8,13,21,34,…………………… Read More …

Java Program to check for Disarium Number

Introduction This program helps to check Disarium Number for a given number. In a simple word we can say “A number will be called Disarium if the sum of its digits powered with their respective position is equal with the Read More …

Java Program to Remove Duplicate Characters from a Word

Introduction This program helps to remove duplicate character from the input string. Like we passed String as “Dharmendra” and a is duplicate in the string so result will be “Dharmend“. Flowchart Please find sample flowchart diagram for this program as Read More …

Java program to find the GCD (Greatest Common Division) of two numbers

Introduction This program helps to find Greatest  Common Division from two given number. First of all we have to understand GCD, it is called as Greatest or highest common different in mathematics. In Simple World we can say – the Read More …

Java Program to check Harshad Number

Introduction This program helps to check that entered number is Harshad Number or not. Before start writing code we have to understand Harshad Number and how it calculated. Harshad Number is a positive integer which is divisible by the sum Read More …

Important Java Program(s) for Professional and Students

Introduction Java programming is very important and it is getting more popular day by day.  Learning Java is also easy now a days as many website available and providing good tutorials, Learner can go though those website to get basic Read More …

Java Program to check Pronic Number or Heteromecic Number Program

Introduction This tutorial will help you to understand Pronic Number or Heteromecic Number Program. In-order to start writing any program we have to understand business requirement and what is the problem. As we know that Pronic Number or Heteromecic Number Program Read More …

eclipse: Findbugs Plugin Configuration on eclipse

Introduction FindBugs is an open source project for a static analysis of the Java bytecode to identify potential software bugs. Findbugs provides early feedback about potential errors in the code. This helps the developer to access these problems early in Read More …

Java Program to check for Duck Number

Introduction This program helps to check weather number is a Duck Number or not. A Duck number is a number which has zeroes present in it, but there should be no zero present in the beginning of the number.    Read More …

Factory Design Pattern & Implementation Using Java

  Introduction Factory design pattern is very important and useful design patter and used in various industrious & technologies. Factory design pattern is useful whenever we want to hide the object creation logic from the outside world. It is hiding Read More …

Singleton Design Pattern Using Serialization

Introduction Singleton Design Pattern is complex to implement at Distributed environment, Where we have multiple JVM install. Multiple threads will invoke the Singleton class from various environment simultaneously which cause multiple object creation. We need to implement Serializable interface in Read More …

Singleton Design Pattern Using Java

  Introduction This tutorial will highlight the importance of Singleton Design pattern using java implementation. It explains various ways of implementation with flaw in the implementation. Singleton design pattern is one of the most common patterns you will see in Read More …

Design Pattern with Examples for Java/J2EE

Introduction Design Patterns are very popular among software developers. A design pattern is a well described solution to a common software problem. Some of the benefits of using design patterns are: Design Patterns are already defined and provides industry standard Read More …

Oracle Database Connection With Examples

To achieve this, JDBC specifications are agreed upon within the Java community–and each database vendor is then left to implement these specification to work with their product. Oracle Drivers Oracle provided two types of Drives. Thin OCI OCI   The OCI Read More …

DB2 Database Connection With Examples

An Example of connecting to DB2 Database using JDBC Driver. A typical example code of connect to database will look like this Class.forName(jdbcClassName); Connection connection = DriverManager.getConnection(url, user, password);   Listed below are connection examples for three common JDBC drivers Read More …

Java database connection Code Examples

Introduction JDBC is an unofficial acronym for java database connectivity. JDBC helps us to connect to a database and execute SQL statements against a database. JDBC api provides set of interfaces and there are different implementations respective to different databases. Read More …

MySQL Database Connection With Examples

Introduction MySQL is a popular open source database which can be used free of charge. MySQL is a relational database. Web applications can use this database to store persistence data. This post explains how to set up Java applications to Read More …

Eclipse Part2– Useful Configuration and Settings For Eclipse

Introduction: This post explains about eclipse useful and important configuration and setting which required for every developer who used eclipse as primary IDE(Integrated Development Environment) for project development.   Effective Eclipse – Shortcut Keys The less you touch the mouse, Read More …

Eclipse Part1– Useful Configuration and Settings For Eclipse

Introduction: The static code analysis tools Code Formatter, Findbugs, PMD and Checkstyle are widely used in the Java development community. Each has an own purpose, strength and weaknesses. This post explains about eclipse useful and important configuration and setting which required Read More …

Student Information System Using Core Java

Introduction The main purpose of this post is to provide overview of Student Information System application to end user. This application used in all educational institution for knowing student information including student name, roll number, address, parents details, fee details, marks in Read More …

Sample Software Engineering Projects

Introduction Software programming (Software Engineering) courses are most often complemented by a software engineering project where a team of students has to develop a large/mini software system. Project development required a lot of efforts and guideline to develop best project. Read More …

Library Management Project using Core Java

Introduction This page contains Library management system project developed using Core Java technologies only to maintain library and Books details. This project is having basic features and it helps the developer to understand core java functionality and start the project. Read More …

Core Java Examples For Practice

Core Java Examples for Practice This section explains Core Java examples for beginners. User can practice these example in their local system. Also, students who started java as their programing skills will get help to enhance their skills. Factor of Read More …