Hire Dedicated Java Developers as Per Experience

Have a complex Java project that you need a project manager to handle? Or are you looking for an additional Java talent that can contribute to your Java Development Team for finishing the project faster? Whatever your requirements, we have dedicated Java Developer of every experience level for hire.


Senior Java Developer

  • 4+ Years of Java Experience
  • 5-6 Project Managed
  • 1200+ Development Hours Completed
  • Suitable for General Level Projects


Full-Stack Java Developer

  • 5-8 Years of Java Experience
  • 8-10 Project Managed
  • 1400+ Development Hours Completed
  • Suitable for Advance Level Projects


Java Project Manager

  • 8+ Years of Java Experience
  • 10-12 Project Managed
  • 1800+ Development Hours Completed
  • Suitable when you Hire Java Team

Skilled Full Stack Java Developers,OnDemand

Hire core Java Developers from Aglowid that are proficient in various Java frameworks such as Hibernate, Struts, Spring, Blade and others. Our dedicated Java programmers can also integrate Java with other popular web app frameworks to provide you with a full-stack Java solution.

Docker Java Experts

Hire Java experts from us to dockerize your Java project for easing and speeding up your Java app development process across various environments.

Oracle Java Consultants

Hire Java architects from Aglowid to design and deploy modern, fast, reliable and resilient Java apps by using Oracle JDBC drivers for your custom Java project.

MongoDB Java Professionals

Hire Java programmers from Aglowid to setup a secure database with powerful querying and analytics features by integrating MongoDB in your Java app.

PostgreSQL Java Programmers

Our dedicated Java engineers can easily integrate PostgreSQL in your Java app using the JDBC API to power your Java app with object-oriented database features.

React Java Developers

Create a full-stack Java solution by integrating React on the frontend and Spring Boot on the backend by availing top Java coders for hire from Aglowid.

Hadoop Java Coders

Enable Internet of Things in your Java app by hiring Java professionals from Aglowid who have proven expertise in configuring Hadoop in your Java application.

Angular Java Engineers

Make your robust and secure app more appealing to the users by pairing it with one of the most popular frontend frameworks – Angular, by hiring our Java programmers.

Frameworks Our Java Developer for Hire, Skilled With

Java development is a broad spectrum with many possibilities and varied solutions. If you want to hire Hibernate Developer or hire Struts Developer or other such Java framework specific talent, you can hire remote developers at cost-effective rates from Aglowid. We have a pool of dedicated Java Developers for you to find the right Java talent for your project.

Blade Developer

Hire Blade Developer from Aglowid to leverage the lightweight open-source template engine for creating complex enterprise-grade web apps on Java. Using Blade, we can integrate features of Laravel in your Java project to expand its features.

J2EE Developer

Hire J2EE developer from Aglowid that are proficient in using EJB for J2EE to make use of functions like memory management, threading, security and concurrency in your custom enterprise level Java based web solution.

Spring Boot Developer

Hire Spring Boot Developers from Aglowid to get instant access to professionals in Spring Boot framework and the wide range of Spring Boot development services to power your modern Java based web app solution.

OpenXava Developer

Have an urgent project that requires complex database handling and needs to be launched faster to market? Hire OpenXava developer and augment them in your app Development Team to speed up your Java project completion.

Core Java Developer

Get end-to-end core Java development services by hiring certified Core Java developer from Aglowid who can handle the design, development and complete management of your Java-based web application projects.

Struts Developer

Hire Struts Developer from Aglowid who are experts in Java based services like developing elegant flexible, maintainable & extensible modern web apps, database design, app customization & other enhancements.

Hibernate Developer

We have pre-vetted Hibernate Developers for hire that know how to leverage ORM, and JPA for powering any JPA-specific Java projects. They are also proficient in writing scalable code, developing responsive websites and microservices that can interact with databases.

Groovy Developer

Hire Groovy Developer from Aglowid who are highly skilled in designing & developing vital Java systems, automating tasks & preparing Java pipelines, working on chaining, asynchronous operations and carry out other Java functionalities.

Java Play Developer

Hire professional software engineers at Aglowid who have experience and expertise in using Play framework for developing robust, scalable & responsive web applications. Our Java Play Developers know how to use it's reactive programming, CoC & other features.

Need Multiple Profiles or an Entire Team?

Find Java Programmers With all Set of Skills

From Java packages to entire production, our professional Java
Engineers possess strong exposure in every segment of Project development & support.

Get Java Expertise

Certified Java Developers as per Project Requirements

Are you looking to hire a Java programmer to work on your existing Java project, or are you finding Java developer team to start a new Java project from scratch? Whatever your Java requirements, Aglowid has flexible engagement models to get Java programmers that match it.

Start New Java

Starting a new Java Project? Why not to get a free consultation. Book a absolutely free consultation call with our Java consultants to get your Java project development roadmap and hire Java coders as per your custom project requirements.

Upgrade Legacy
Java Project

Have an existing Java project that you want to upgrade to the latest Java version, but unsure how to? Hire Java experts from Aglowid for seamlessly upgrading your legacy Java project to the latest Java version without any risk of data loss.

Migrate to
Java Ecosystem

Have an existing web app based on other backend frameworks? Want to shift to Java but worried about potential risks and vulnerabilities? Hire Java engineers from Aglowid to make this process effortless and secure.

Java Team Augmentation Services

Have an existing Java Development Team, but running short on resources? Hire a Java professional with excellent communication skills from Aglowid and easily onboard them in your team within 48 hours.

Our Java Developers Rates Starting @ $20/hr

With Aglowid, you get the three most efficient hiring models to hire Java developer per your needs. Our Java developer can be hired on Full Time, Part Time and Hourly basis.

Hourly Hiring

Start work in 48 hours


8 Hrs/Day

Minimum Days

30 Days



Full Time Hiring

Start work in 72 hours


8 Hrs/Day

Minimum Days

30 Days



Part Time Hiring

Start work in 48 hours


80 Hrs/Month

Minimum Days

30 Days



Services You Can Avail With Offshore Java Programmers

Extend your dev strength with the best pre-vetted Java Talents at Aglowid who can provide you with a diverse range of Java backend solutions. Find and hire Java Developers for any specific niche or requirement. Our dedicated Java coders expertise in -

Custom J2EE/J2ME

Develop high quality scalable and robust enterprise solutions utilizing latest Java technologies based on J2EE/J2ME and other frameworks such as Spring, Hibernate, Sturts.

Java Cloud

Hire proficient Java Cloud Developers with prolonged experience in integrating & managing popular cloud technologies such as AWS based EC2, ElastiCache, DynamoDB, Lambda, Redshift etc.

Java Android

Develop a native Android Mobile App with our dedicated Java mobile app developers for hire and get an interactive, secure, scalable, and robust Java based mobile application.

Java iOS

Build a secure yet elegant iOS apps based on Java frameworks with our certified Java iOS developer and enjoy the cost-effective smoother native iOS interface experience that appeal your user's interest.

Java API

Integrate your existing projects with the powerful, robust APIs. Hire Java API Experts at Aglowid and get the most secured yet robust performance driven APIs for your business project.

Java Consulting

Looking for result-oriented Java Based Solutions? Our Dedicated Senior Java Coders are always there to consult you with any type of Java based query for your project.

Java Migration

Looking to migrate your existing project to Java? Our Senior Java Architects are well experienced in migrating the existing projects to other platforms without disturbing the existing work.

Java Support / Maintenance / Testing

To ensure a workable project, one needs on-time support for maintenance. Hire Remote Java Developers from us to ensure the workability of your project.

Skills & Abilities of Our Java Developer

At Aglowid, we only hire the top 1% of Java engineers after putting them through a tedious screening and selection process. Our dedicated development team is comprised of professional Java Developers who are not only well-versed in Java development best practices but also possess the necessary skills required for handling Java projects of any complexity. Aglowid Java Developers also consistently stay updated with the latest advancements and skillsets in the Java ecosystem, making them the right choice:


Java Developers Skills

  • Hands-on experience with Core Java
  • Proper understanding of OOPS concepts with exception handling and memory management
  • Experience in working with relational and non-relational databases like MySQL, MongoDB etc
  • Experience in using Java IDE Tools like IntelliJ IDE, Eclipse
  • Understanding of latest project management concepts like SCRUM, Agile, Waterfall
  • Familiarity with Java Libraries
  • Ability and practice in following Java best coding practices


Java Developers Skills

  • Verbal and non-verbal communication skills
  • Team Player attitude and ability to interact with teammates
  • Ability to understand and respond to client requirements
  • Important leadership traits such as self-awareness, integrity, empathy, learning agility, respect
  • Ability to accept and act upon constructive criticism
  • Efficient time distribution between various tasks
  • Should stay up-to-date with the latest changes in Java
  • Experience working in an Agile development environment
  • Experience in using different communication tools

Hire Dedicated Resources

To Build Developers TEAM

Flexible Hiring Models | Cost-Effective Rates | No Long-term Lock-Ins

Build My Dream Team

Hire Dedicated Talents

To Scale Remote Team

Flexible Hiring Models | Bulk Hiring Discounts | No Long-Term Lock Ins

Add Dedicated Talents

Tech-Stack Expertise Our Java Developers for Hire Hold

All our professional Java Developers follow all best practices in Java development and have absolute understanding of core Java principles. They also are proficient with many Java development tools available for smoother Java development process.


  • Spring
  • Hibernate
  • Struts
  • Vaadin
  • Blade
  • JSF


  • Alfresco
  • Magnolia
  • LogicalDOC
  • Asbru
  • OpenCMS
  • Walrus


  • Apache Commons
  • Google Guava
  • Jackson
  • JAXB
  • SLF4J
  • Log4j2


  • Dropwizard
  • MicroProfile
  • Micronaut
  • JHipster
  • Spark
  • Vertx

Cloud Services

  • AWS
  • Heroku
  • Google Cloud
  • Microsoft Azure
  • Aruba Cloud
  • OVH


  • Oracle
  • MySQL
  • MongoDB
  • PostgreSQL
  • Microsoft SQL Server
  • IBM DB2

Why Hire Java Developers from Aglowid?

Benefits of Hiring Java Developers from Aglowid

  • Instant access to pre-vetted and experienced Java Developers
  • Flexibility to work as per your time-zone
  • Flexible Engagement and Hiring Models as per your requirements
  • Complete confidentiality with signed NDA and complete code ownership
  • Agile Development with sprints and transparency in Project Updates
  • Guaranteed on-time delivery
  • Cost-effective Java Developers for hire at 1/4th market price
  • Reliable maintenance and support services post-deployment
  • Easy and Seamless Migration Services
Why Aglowid

Hiring Java Programmer from Aglowid vs In-House vs Freelance

When you hire Java Programmer from Aglowid, you get the benefits of a dedicated Java developer team at the most cost-effective rates, that overcomes the limitations of hiring in-house Java Developers and freelancers. Get assured quality work with important documents such as signed NDA, code ownership, Service Level Agreements and hire the best talents in Java development for your project today.

In-House Freelancer
Hiring Model Full Time Monthly, PartTime & Full-time Weekly, Hourly
Time to Get Right Developers 4 - 12 weeks 1 day - 2 weeks 1 - 12 weeks
Time to Start a Project 2 - 10 weeks 1 day - 2 weeks 1 - 10 weeks
Recurring Cost of Training & Benefits $10,000 -$30,000 0 0
Time to Scale Size of the Team 4 - 16 weeks 48 hours - 1 week 1 - 12 weeks
Pricing (weekly average) 2.5 X 1.5 X 1 X
Project Failure Risk Low Extremely low, we have a 98% success ratio Very High
Developers Backed by a Delivery Team Some Yes No
Dedicated Resources Yes Yes No
Shadow Resource Costly Yes No
Project Manager Extra Cost Minimal cost No
Quality Assurance Check Extra Cost Assured No
Query Support High 24 Hours Assurance No
Tools & Environment Depend on Team High Uncertain
Agile Development Methodology May Be Yes No
Impact Due to Turnover High None High
Structured Training Programs Some Yes No
Communications Seamless Seamless Uncertain
Termination Costs High None None
Assured Work Rigor 40 hrs/week 40 hrs/week Not Sure

Gain the Technological Edge

Hire Offshore Java Developers from Aglowid

Pre-vetted | Java Best Practices | Cost-Effective Rates Starting @ $20/Hr

Hire Java Experts Today

Hire Java Developers in 4 Easy Steps

Choose your
Engagement Model

Pick the right engagement model as per your project needs – Full Time, Part Time or Hourly.

Screen & Select
Java Developers

Pick the best candidates from our top Java Developers' Profiles to continue.

One-on-One Interview

Interview the selected candidate where you can assess their skills via theoretical & practical questions.

Java Developers

Now, the selected final candidate will onboard your team within 24–48 hours after final confirmation.

Java Hiring Guide – How to find and hire Java Developers?

Finding the right candidates to fill your Java developer vacancy can be a challenging process that requires proper strategical planning and execution. Here is the ultimate hiring guide you can refer to when you are looking to hire Java developers for your next venture –

Critical Aspects to Keep in Mind before Finding Java Developers

Before you step out to find Java programmers for your project, you should prep a little to have a better opportunity of finding the right talent(s) effectively and in shorter duration. It helps having clarity about –

  1. What are your Project Goals and Objectives?
  2. What is the role of the Java Developer you want to hire in achieving those goals?
  3. Do you need any specific integrations? Ecommerce, Social Logins or others?
  4. Is your project complex? Will it require a small team of entry-level Java developers or a dedicated team of experienced Java programmers?
  5. How much can you invest in this project? Do you have any time constraints?
  6. What is the engagement model you want to hire them for? Part Time, Hourly, Full-Time?

How to Find and Hire Professional Java Developers?

One you have your (PRD) Project Requirements Document ready, you should focus on where you can find professional Java developers at. There are multiple ways you can search for Java developers online and offline. Some of them are -

  1. Attend Local and International Java Developer Conferences.
  2. Make use of professional networking platforms like LinkedIn & Twitter (Presently known as X).
  3. Freelancing websites such as Upwork, Freelancer and Flexiple.
  4. Find remote Java Development Companies online.
  5. Search for offshore, remote and other such keywords.

How to check a Java Developer’s Technical Expertise?

Java has been around since ages, and it has undergone several transformative changes in this duration. When looking for Java Developers, you need to assess their fundamental concepts of Java as well as knowledge about latest Java frameworks, libraries, rules, coding best practices, security setup and other such important aspect. Here are some key technical skills to look for when hiring Java developers –

  1. Make them participate in popular coding platforms like HackerRank, LeetCode or Code Signal.
  2. Provide real-word scenarios and assess their problem-solving capabilities.
  3. Request for their code samples or ask them to solve a basic Java problem during interview.
  4. Ask questions about searching, sorting, trees, linked lists and other such fundamental concepts.
  5. Check their knowledge regarding Java testing frameworks such as JUnit and Mockito for Unit Testing, Spring Boot Test for integration testing & other test-driven practices.
  6. Ask questions about their experience and knowledge using Java development tools, frameworks and libraries such as Spring Framework, Maven/Gradle, Java EE & more.
  7. Ask questions about Java Collections Framework, Exception Handling, Multithreading, Synchronization and JVM internals.
  8. Ask questions about implementation of a binary search algorithm, reversed linked list and other such concepts in Java.

How to assess a Java Developer’s Interpersonal and Communication Skills?

Next, it is also important to check the communication and team skills of the Java developers you are screening to join your team. Here are some effective ways to assess their communication skills –

  1. Ask them about their past experiences working with a team. Try to gauge their ability to solve conflicts with peers and come up with innovative solutions.
  2. Pay attention to how they explain the technical concepts. If they can articulate and explain it well, their fundamentals would be clearer than ones who can’t.
  3. Inquire about their experience working in Agile and Scrum work environments.
  4. Observe their ability to actively listen through their responses or doubts.
  5. Request them to show any code samples they have developed for past projects.
  6. Ask them if they have any client handling/interaction experience.

How to gauge a Java Developer’s cultural alignment?

Cultural alignment, or cultural fitness is as important as the developers technical and interpersonal skills. If the talent isn’t a right fit as per your company’s working culture, it is likely to cause riffs, arguments and delayed project deliverables. Hence it is important to know their cultural believes before making them an offer. Here is how you can test Java developers’ cultural alignment –

  1. Define your work culture, company’s values and mission so they have a clear understanding of your expectations.
  2. Mention such traits as collaboration, innovation, team player and other keywords in your job description.
  3. Pose a hypothetical situation that tests their decision making and emotional intelligence based on their choices.
  4. Ask them about their experience with company traditions or rituals.
  5. Assess their ability to adapt to different working environments if they have worked at multiple companies.
  6. Get feedback from their references or other ex-team members.

How to make an effective and appealing offer to the Java Developer(s)?

Everything checked out so far? Great! Now you need to also make sure the developer takes interests in your offer! To do so, you need to strategize how to approach them while making your offer that holds their interest but at the same time doesn’t cost you a fortune beyond your comfort budget range. Here’s how you could go further with negotiations –

  1. Learn the market pulse
  2. Always learn from market. Check the prices offered for the role you’re screening them for. For instance, you are looking for Java Architects, check the average annual salary or hourly rates they are been offered through studies, job portals and other credible sources.

  3. Internal Equity
  4. Self-assessment is just as necessary. Check what you’re offering to other developers in the same league as the candidate you’re looking to hire. Refer to their salary negotiation structures to be better prepared for negotiations.

  5. Comprehensive Benefits
  6. Build a proper salary package with non-monetary benefits included such as health insurance, dental and vision coverage, retirement plans, planned leaves and other such perks your company can afford to offer.

  7. Challenging Projects
  8. Provide them with a glimpse of some challenging projects they will get to be a part of. Make sure to showcase your commitment to experimenting and using latest Java developer tools.

  9. Recognition and Rewards
  10. If your company has policies for employee recognition rewards, bonuses or any such programs, highlighting them will give you an edge in further negotiations.

  11. Work-Life Balance
  12. Discuss how your company approaches work-life balance and how much does it value it. Employees look for companies that understand the importance of work-life balance.

How to onboard and integrate Java Developer in your Dedicated Development Team?

Once every other process is out of the way, you should focus on effectively onboarding the Java developer/developers in your team. Here are some good practices you can follow for doing so -

  1. Send a proper welcome package with company documents, technology stack, and some goodies
  2. Setup the hardware and software needed for the developer to carry out their tasks prior to their arrival
  3. Assign a buddy/mentor that would help them navigate the company’s processes, work environment and projects
  4. Start by giving them responsibility for certain tasks
  5. Acknowledge their inputs and appreciate valuable ones
  6. Point of areas of improvements and see how they respond to criticism

Java Developer Hiring Contract Outline

I. Outline Employment Term
What to Include Sub-details
Position Details Job Title, Job Role, Project Details
Work Schedule Defined working hours, working days, leaves entitlement.
Location On-site, remote or combination of both.
Start Date Define expected start date
Duration of Employment Permanent, Contractual or Temporary
II. Salary and Other Perks
What to Include Sub-details
Salary Expected Salary, Frequency of Payment
Benefits Health insurance, Retirement Plans, Paid Leaves, Vacation Days & other Perks
Bonuses & Incentives Performance Based Bonuses, Employee Referral Incentive and other such monetary perks.
III. Job Contract
What to Include Sub-details
Job Description Detailed Job Description which includes Key Responsibilities, Expectations and other required skills.
Terms and Conditions Clearly outline the Terms and Condition of Employment. Make sure it includes – Termination Clauses, Probation Duration, NDA and Non-Compete Agreements.
Confidentiality Agreement Add a confidentiality agreement to protect the company's sensitive information if needed.
Dispute Resolution Specify how to resolve a dispute if one ever arises between the employee and employer.
Legal Compliances Make sure the job contract complies with relevant employment laws and regulations.
IV. Final Steps and Contact Information
What to Include Sub-details
Test Project/ Pilot Task Provide topic and submission deadline for any test task (if any).
Legal Paperwork Ask the candidate to provide all important documents to start onboarding.
Contact Information Provide a PoC – Point of Contact to whom the candidate can reach out if they have any queries.

Hire Java Developer - Interview Questions

Why is Java a platform independent language?

Java is considered as a platform independent language because it makes use of JVM – Java Virtual Machine that abstracts the underlying hardware and operating system. By translating the platform independent Java bytecode into machine-specific code, Java programs are able to run on any platform that supports JVM. Hence Java programs are able to run on almost any platforms without needing much intervention from the developer to modify the Java codebase to work on a platform.

This concept is known as decoupling the language from the hardware and OS. Most languages compile directly to machine code, whereas Java compiles to an intermediate format known as bytecode which can be executed on any platform through JVM. This enables Java to be a ‘Write Once, Run Anywhere’ library, which makes it a truly platform independent language.

Why is Java not a pure object-oriented language?

The reason Java cannot be called a pure object-oriented language is that it supports primitive data types like int, byte, long and more which are not objects. Java mixes objects and primitive data types, meaning not everything in Java is an object. This goes against the qualities of pure object-oriented language.

Additionally, Java has features like static fields and methods that can be used without having to create any instance of a class. This defies the principle of encapsulating data and behavior within objects, which is an essential part of object-oriented programming.

Even if Java is not a pure object-oriented programming language, it still provides impressive support for OOPs, making it ideal for developing large-scale applications.

Difference between Heap and Stack Memory in java. And how java utilizes this.

Stack and Heap Stack Memory are two types of memory used by Java programs during execution. Both are useful towards establishing a proper memory management system in place and avoiding memory leaks or inefficient resource utilization.

Stack memory is where the data is stored temporarily whereas Heap memory is used for dynamic memory allocation. It is a pool of available memory that is used by the program, and it can grow or shrink as per memory allocation and freeing.

Stack and Heap Memory in Java differ in terms of –

Aspect Stack Memory Heap Memory
Size Management Fixed Size, Determined at the initializing stage of execution Flexible size, changes during the program’s lifecycle
Storage Purpose Control info, local variables, function arguments Objects, Data Structures with dynamic lifespans
Data Accessibility Only accessible during active function call Accessible until Java developer manually deallocates it or the program ends
Memory Management Automatically managed Manually managed by the Java programmer
Localization Near the CPU, better access times Further away, slower access times
Garbage Collection Not required Requires garbage collection for avoiding memory leaks
Lifetime Limited to the scope of a function Dynamic, can exist beyond the scope of a function

What are the default values assigned to variables and instances in Java?

In Java, variable and instances of classes get assigned default values when not explicitly initialized. The default value would depend on the type of variable. Here are some default values for common data types in Java –

Numeric Types:

  • ‘byte’ , ‘short’, ‘int’, ‘long’:O
  • ‘float’ , ‘doube’:O.O

Character Types

  • char ‘ :\u0000’ (null characters)

Boolean Types

  • ‘boolean’: ‘flase’

Object References

  • For objects (instances of classes): ‘null’

These are the default values that get automatically assigned by Java runtime system when you declare a variable without explicitly initializing it. Local variables need to be explicitly initialized before they are used or the code could run in a compilation error.

Difference between static methods, static variables, and static classes in java.

Java makes use of the word ‘static’ for defining class elements rather than class instances. Static keywords can be utilized with classes, methods, variables and also blocks. By making a member static, it can be accessed without ever needing to create a class.

A static variable will be a class-level variable that has only a single copy and gets shared by all class instances. When you modify static variable by one object, it gets reflected in all others. This is useful for sharing data between multiple class instances.

Static method refers to a method that belongs to the class and not the object. You aren’t required to call an object and it isn’t able to access non-static variables/methods.

And a Static Class is a class in Java that cannot be instantiated and all its members are static. Such a class refers to a collection of static methods and variables.

Quick Tabular Comparison b/w Static Method, Static Variables and Static Classes

Feature Static Method Static Variable Static Classes
Purpose Defines behavior related to the given class Store data shared by all instance of a class Grouping related functionality, never instantiated
Access Can only access static data members and static methods Able to access both instances and static data members Static classes cannot be instantiated
Memory Allocation Fixed in the RAM, single allocation Dynamic, allocated as per instance Static classes cannot be instantiated
This Keyword Can’t use Can use Static classes cannot be instantiated
Access Modifiers Can use public, private, internal, protected modifiers Can use public, protected and private modifiers Static classes cannot be instantiated

Can the static methods be overridden?

No, you cannot override a static method in Java. The concept of overriding in Java applies to instance methods and not static methods. It is used for situations where a subclass wants to provide a different implementation for a method then the one already provided by its superclass.

Static methods are not polymorphic in nature. Hence, if a subclass defines a method with the same signature as the static method in its superclass, it is not considered an override. It becomes a new static method with the same name.

The subclass can access the static method of its superclass by using the keyword super.

Difference between overloading and overriding in Java

Method Overloading allows Java developers to define multiple methods within a single class with the same name. But each overloaded method needs to have different number or type of parameters. This is useful as you can use the same method name to perform various tasks as per the parameters provided.

public class OverloadingExample {
// Method overloading with different number of parameters public int sum(int a, int b) { return a + b; } public int sum(int a, int b, int c) { return a + b + c; } // Method overloading with different types of parameters public double sum(double a, double b) { return a + b; } public static void main(String[] args) { OverloadingExample example = new OverloadingExample(); System.out.println("Sum of 3 and 5: " + example.sum(3, 5)); System.out.println("Sum of 3, 5, and 7: " + example.sum(3, 5, 7)); System.out.println("Sum of 3.5 and 5.5: " + example.sum(3.5, 5.5)); } }

Method Overriding is used for achieving runtime polymorphism. Poly in Polymorphism means “many” and “morphs” refers to “multiple forms”. Hence, polymorphism in Java allows developers to use a child class object instead of a parent class object. For overriding a method in Java, the child class needs to define a method with the same name, return type and parameters of that of parent class method. The child class method also needs to contain the ‘override’ keyword.

class Parent {
    void show()
        System.out.println("parent class method");
        class Child extends Parent {
            void show()
                System.out.println("child class method");
public static void main(String args[])
    Parent ob = new Child();;

When can you use super keyword?

We use the ‘super’ keyword in Java for calling methods or constructors in a superclass or for accessing members of a superclass that are hidden by members in a subclass. Here are the three use cases where we would use the ‘super’ keyword –

Calling a method in the superclass:

Here we can use the ‘super’ keyword to call a method in the superclass from the subclass.

public class Birds {
    void makeSound() {
        System.out.println("The birds makes a sound");
public class Kingfisher extends Birds {
    void makeSound() {
        super.makeSound(); // Call the makeSound() method in the Birds class
        System.out.println("The kingfisher makes a kik-kik sound");

As you can see, the ‘Kingfisher’ class extends the ‘Birds’ class. The ‘Birds’ class overrid the ‘makeSound()’ method from the ‘Birds’ class. Inside the overridden ‘makeSound()’ method in the ‘Birds’ class, the ‘super.makeSound()’ statement calls the ‘makeSound()’ method. This first executes the ‘makeSound() method in ‘Birds’ class and later executes the rest of the code in the ‘Kingfisher’ class.

Hence, when you create the ‘bird’ object and call the ‘makeSound()’ method, you will get the following output:

The bird makes a sound.
The Kingfisher makes a kik-kik sound.

Calling a constructor in the superclass

Here we will use the ‘super’ keyword to call a constructor in the superclass from the subclass.

public class Birds {
    private String name;
    public Birds(String name) { = name;
public class Kingfisher extends Birds {
    private int age;
    public Kingfisher(String name, int age) {
        super(name); // Call the constructor in the Birds class
        this.age = age;

In this example, ‘Kingfisher’ class extends to ‘Birds’ class. The ‘Birds’ class uses a constructor that takes two parameters – ‘String’ and ‘int’. Inside the ‘Birds’ constructor, the ‘super(name)’ statement is used for calling the constructor in the ‘Birds’ class. So, when a ‘Kingfisher’ object is created, it executes the constructor ‘Birds’ class and then executes the remainder of the code in the ‘Kingfisher’ constructor.

Accessing a hidden member in the superclass:

In this instance, we will use the ‘super’ keyword for accessing a member of the superclass that is hidden by a member of the subclass.

public class Birds {
    protected String name;
    public Birds(String name) { = name;
public class Kingfisher extends Birds {
    private String name;
    public Kingfisher(String name) {
        super(name); // Call the constructor in the Birds class = name;
    public void displayName() {
        System.out.println("Name of the Kingfisher: " +;
        System.out.println("Name of the birds: " +;

Here the ‘Kingfisher’ class extends the ‘Birds’ class. The ‘Kingfisher’ class uses a private ‘name’ variable to hide the ‘protected name’ variable in the ‘Birds’ class.

Inside the ‘displayName()’ method the ‘Kingfisher’ class has ‘’ statement that is used for accessing the ‘name’ variable in ‘Kingisher’ class and the ‘’ statement is being used for accessing the ‘name’ variable in the ‘Birds’ class.

Define Copy constructor in java.

Copy constructor in Java refers to a constructor used for initializing an object via another object of the same class. The changes made to the existing object won’t affect the new copy.

What are shallow copy and deep copy in java?

When we copy some entity for creating two or more entities in a way that the changes in one entity reflects in the other entity as well, it is called a shallow copy. Since the changes are reflected and mimicked on all shallow copied entities, new memory allocation never happens for the other entities. Only the reference of that entity is copied to the other entities.

On the other hand, Deep copy is when we copy some entity to create two or more entities in a manner that changes made to one entity doesn’t reflect in other entities. Since the reference of one entity doesn’t get copied to the other, each entity has its independent reference. Also new memory allocation takes place for each deep copy entity.

How java supports inheritance?

Java supports inheritance which is a mechanism in which one object acquires all the properties and behaviors of a parent object. It is an important aspect of the Object-Oriented Programming System. The purpose behind inheritance is to create new classes built upon existing classes. This allows reusing the methods and fields of the parent class while adding more fields in the current class if needed. Java supports multiple types of inheritance such as

Single Inheritance –

when a derived class or a subclass inherits from a single base or superclass.

Multi-level Inheritance –

this is a situation where there is more than one level where the class inherits from a base class and this derived class in then inherited by another class.

Multiple Inheritance –

this is a type of inheritance where a class is able to inherit properties and behavior from more than a single parent.

Hierarchal Inheritance –

this type of inheritance creates a sense of hierarchy where a super class is inherited by more than one class.

Hybrid Inheritance –

when you combine one or more types of inheritance, it is called hybrid inheritance.

What is Java Singleton?

Singleton is an important design pattern in Java. Its purpose is to ensure that a class should only be allowed to have one object. The class needs to ensure that only a single instance should be created and single object is allowed to be used by all other classes. There are two types of Java Singleton patterns – Early Instantiation and Lazy Instantiation. Singleton Pattern is mainly used for multi-threaded or database-driven applications.

What is Servlet?

Servlet is a Java class that manages, processes and replies to requests with responses. It is used for extending the capabilities of servers that host applications that are accessed via request-response style of programming. Servlets are most commonly used for building web apps and provide a solution to create dynamic content on the web server and interact with client requests.

What is Beans?

JavaBeans is a design pattern that comes with a set of conventions for building reusable and modular components. They represent data in object-oriented manner and are commonly used in GUI development.

Explain the difference between Multiprocessing vs Multithreading in Java.

Multiprocessing as the name suggests, refers to multiple processes running independently with their own allotted memory space. They don’t share memory and any communication between them is achieved through inter-process communication mechanisms.

Multithreading on the other hand runs multiple threads within the same process, sharing memory space. Since these threads are within the same process and they share memory, they are able to communicate much more efficiently with each other.

What are access modifiers in java?

Access modifiers in Java are keywords which specify the accessibility and visibility of classes, methods, variables and other components of a Java program. They are mainly used for controlling the level of encapsulation and restricting access to certain components of a class.

There are four major access modifiers in Java –

  • Public : Public declared classes are accessible by another class. They have no access restrictions.
  • Private : Private declared classes are only accessible only within the same class. Other classes can’t see them even if they are in the same package. Private classes provide high level of encapsulation.
  • Protected : Members declared as protected are accessible within the same class and other class in the same package and subclasses. Protected classes provide limited level of visibility.
  • Default : If no access modifier is applied, Java takes the package-private method which makes the member accessible within the same class and other class in the same package. It restricts access from classes outside the package.

Frequently Asked Questions

We have very cost-effective development rates, and you can hire our world's top-class Java developers starting from $20/hour (Rates varies with respect to the developer’s experience). They build your extraordinary application/website right in the deadline.

We understand one size does not fit all, and hence we have a set of flexible pricing models to avail our Java talent based on the client's preferences. Choose your preferred pricing model from;
  • Fixed Cost Pricing Model
  • Time and materials Pricing Model
  • Pay as you use/Pay per unit
  • Mixed Mode Pricing Model
Check Our Pricing Models for details.

There is no defined time for any project, as it entirely depends on the size and model of the project. Generally, a Java project may take 3 to 8 weeks to complete while in some cases it will take a whole year, depending on the size, customization, integration, feature, and functionalities you want to have on your Java based project.

First, we follow agile methodology. Besides, we have some set of the customized web app development process which involves;
  • Project Ideation
  • Project Analysis and Research
  • Choosing defined technologies
  • Choosing the right development tools
  • Transform through proven development process
  • Debugging & Testing
Check Our Development Process in Details.

It's very simple as you are always in the loop while we develop your project -thanks to our dedicated project management strategies and the use of tools. Besides, we are also open to your preferred medium to communicate.

We have dedicated project management tools in place, such as Trello, Skype for Business, Microsoft Project, Jira, Slack, and so much more. We are open to adopting our client's choice -what they preferred and comfortable with.

That never happens; Client Satisfaction is our first priority, and we dedicatedly work to keep our call. Still, if you are not satisfied with our work, just talk to us at the same moment, and we will work out on possible solutions which suit your requirements or what makes you satisfied.

That's possible, though changing developers in the mid of project development may delay the project. The newly deployed developers may need some time to understand the projects. However, we keep a backup plan ready for such a situation.

This is a matter of consultation, but we can assure you that you will get something more than expected. Here you will get an experienced team of Java developers along with a project manager who can reduce your overall burden to manage the project.

You can check our developers' skills and expertise by taking their interviews over Skype call. We are open to prove our expertise. Feel free to give test tasks so that you can check our coding standards.

Absolutely Not! Our all policies are transparent; we don't have any hidden policies. We make everything clear right in the beginning. But yes, you might get charged for the use of 3rd Party Add-ons on your website, which will be informed to you at the initial stage.

Yes, we do. You will get a signed NDA document along with confidential letters and other MoUs.

A complete ownership is guaranteed to our clients for their projects. Along with the project, you will get the following:
  • Copyright
  • NDA
  • Intellectual Property
  • Source code and more

Yes, we understand the importance of after-sales services; we provide constant support to clients until the projects get successfully implemented. It also depends on the project we provide free as well as quick, responsive after-sales for a predefined amount of time. Once that time is completed, we will charge you for further support.

If you are opting for particular resource hiring, then 30% of the payment needs to be done upfront. The rest needs to be paid on the given date after handing over the project. Payment can be transferred to the account or done online too. For other queries, feel free to call us anytime.

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