Category Archives: java training in pune,

Get Hired with One of The Best Java Training Institute In Pune

“Get Hired, Not Just Certified”

If not anything else, you must have at least heard the word Java. No wonder it does not require any separate introduction.

Still, for those who are new to the field of computers or are totally unaware, here are some key points about Java programming language.

James Gosling is known to be the creator of Java. He developed the language at Sun Microsystems. Some major characteristics of Java are- it is object oriented, class-based and concurrent. It is known to have very few execution dependencies that make it the first choice for a variety of applications all over the world. Not to tell differently that it is amongst the most widely used programming languages.

What developers’ like the most is the fact that it has the principle of write once, run anywhere. This means that a Java code post compilation can run on all platforms. No need to recompile time and again.

The sole intention behind this was to make you acquainted with the world of Java before you go for a Java class in Pune for further training.

Thus, Core Java training would be your initial step before you move on to the next level. What better place than CRB Tech for Core Java training in Pune?

About CRB Tech Java Training :-

Java training course in Pune will help clear your Java related concepts and thus make you an expertise in Java development. CRB Tech stands amongst the best institute for Java in Pune. This is evident from the fact that we have provided 100% placements to our candidates and speaks for the quality of training we provide.

Therefore, if you are looking for best Java classes in Pune, for your Java coaching, then CRB Tech has to be your first choice. It happens to be the best Java training institutes in Pune.

Why CRB Tech Java Training is best?? Here is Ans:-

CRB Tech’s Java developer course in Pune has a number of highlights that make it stand out from its peer courses conducted at other Java training institutes in Pune. These are as follows:

1. 100% job guarantee:

We practice such high standards in our training and placement activities, that we provide a 100% job guarantee on a legal stamp paper. We boast of it!!! Very few Java training institutes are known to do the same.

2.Placement Records :

Many of our candidates have got placed in renowned companies like Capgemini, Amdocs, Mindgate, Vyomlabs etc. A total of almost 400+ of our students have been placed in this year.

See our students Reviews here:CRB Tech Students Speak

3.LOI (Letter of intent):

We at CRB Tech provide LOI or you can call it a company offer letter at the start of the training itself. So, you have a job at hand right then.

4.Placement clients:

Our association with a number of placement clients provides you with a sea of opportunities while getting your dream job.

5.German language coaching:

German language skill set will help you while getting a job abroad in a country like Germany.

6.Interview calls:

Students undergoing Java language training start getting interview calls from the first month of enrollment itself. Till he or she is placed, calls continue to pour in with no restriction on their numbers.

So, if you are dreaming for such dream companies, you ought to Enroll today for Java Training


Our corporate like infrastructure is one aspect that takes us into the list of one of the best Java training institutes in Pune. Our aim behind providing such an infrastructure is that our students should get a feel of the corporate world, right from their training days.

 8.Focus on industry oriented training:

At CRB Tech, we teach you the skills that are required by the industry. Due to this, it becomes easier for the candidates to adapt to the real time work they do at their jobs. Practical application of the knowledge becomes easier. As our students pass out, they become industry ready.

9.Emphasis on technical knowledge:

As Java is a programming language, having good conceptual knowledge of coding is utmost necessary. Therefore, special attention is given on this, and students are given a lot of programming assignments during their Java classes in Pune. This helps them turn into expert coders.

10.Guidance from industry expert mentors:

At CRB Tech, the best Java institute in Pune, we have on board experts from the industry, that share their knowledge and experience with the students. They also give valuable tips that help to crack interviews.

11.Soft skill training:

Most of the times, this becomes a weak link for the students. Good English communication is necessary when you enter the corporate world. Therefore, soft skill training is given to the students to boost their confidence. Many of our students have benefited from this.

12.Aptitude training and mock interviews:

Aptitude preparation is a part of the training program and it helps the job seeker to crack the hardest of the aptitude tests, when they go for Java jobs in Pune. Mock interviews are also conducted, which give them important tips for cracking the company interviews.


We provide the interested candidates assistance, for their Java Sun certification exam.These were a few highlights of our Java training Pune.

Eligibility criteria for our Java course:

A career in Java programming is promising, and anybody can learn Java as long as:

Any candidate who owns a degree in the field of computer science or at the end of the day, B.E/B.Tech or B. Sc Computers and even masters degree owners are preferred and recommended for this course.

Duration and Financial assistance:

The duration of the training and placement program at our Java developer institute in Pune is of

4 months. The Java classes in Pune run for 7-8 hours on weekdays.

Talking about the financial options:
  • Loan options:

Loan and installment options are made available for payments of fees.

  • Credit Card:

Students can opt the option of EMI payment on their credit cards.

  • Cash payment:

Fees can also be paid in easy cash options.

We Design Special Corporate syllabus for Students:

Lets go through the Java course syllabus over here. It will give you a feel of what all is covered as a part of the Java training class. The syllabus is designed extensively beginning from the basics and gradually progressing towards the more advanced topics.

The module-wise structure and breakup of the Java programming course in Pune conducted by us,

is mentioned below:

Introduction To OOPS:

  • Need of Object Oriented Approach

  • Understanding Object Oriented Approach

  • Understanding Objects

  • Object Characteristics

  • Object Model

  • Major Pillars And Minor Pillars

  • Group Discussion

Introduction To Java And SDE:

  • Introduction To Java Programing Language

  • Java History

  • Java Features

  • Hello world Program

  • Introduction To Eclipse

  • Simple POJO & this Keyword

  • Group Discussion

Language Fundamentals:

  • Java Literals, Keywords, Identifiers

  • Java Datatypes

  • Type Casting

  • Operators

  • Flow Control Structures

  • Looping Control Structures

  • Scanner Class

  • Arrays

  • Foreach Loop

  • Group Discussion

Introduction To Classes And Objects:

  • Classes, Objects And Instance Variables

  • Constructors

  • Object Instantiation And Reference Variables

  • Static Variables And Methods

  • Anonymous Block, Static Block

  • Group Discussion


  • Inheriting A Class

  • Super Keyword

  • IS-A ,HAS-A Relationship(Containment)

  • Object/Reference Casting

  • Object Class

  • Static And Anonymous Inner Class

  • Group Discussion


  • Method Overloading

  • Method Overriding

  • Method Hiding

  • Abstract Method

  • Abstract Classes

  • Final Keyword

  • Group Discussion

Garbage collection:

  • Understanding Garbage Collection

  • Finalize Method


  • Inheritance And Diamond Problem

  • Need For The Interface

  • Understanding Interfaces

  • Extends And Implements

  • Abstract Class Vs Interface

  • Instance Of Operator

  • Group Discussion


  • Creating Packages

  • Using Multiple Packages

  • Java Packaging Structure

  • Access Specifiers

  • Static Import

  • Group Discussion


  • Understanding Reflection

  • Using Reflection

  • Important Classes In java.lang.reflect


  • String Class

  • Interned Strings

  • String class Vs Interned String

  • String Constructors And Methods

  • StringBufffer Class

  • StringBuffer Constructors And Method

  • String Vs StringBuffer

  • StringBuilder Class

  • Group Discussion


  • Understanding Exceptions

  • Exception Hierarchy

  • Handling Exceptions

  • Blocks And Clauses

  • Throw And Throws Keywords

  • Checked And Unchecked Exceptions

  • Custom Exception

  • Group Discussion

Wrapper classes:

  • Need Of Wrapper Classes

  • Wrapper Classes For Primitives

  • Wrapper Classes Hierarchy

  • Wrapping And Unwrapping

  • Strings And Wrapper Classes

  • Autoboxing And Unboxing


  • Introduction To Collection Framework

  • What Is Framework

  • Collection API

  • Generic Collections

  • ArrayList Class

  • LinkedList Class

  • Group Discussion

  • HashSet,LinkedHashset,TreeSet

  • HasMap,LinkedHashmap, TreeMap

  • Usage Scenarios

  • Hashcode and equals method

  • Comparable And Comparator Interfaces

  • Legacy Collections

  • Some Other Important Classes(Date,Arrays,Collections,etc)

  • Group Discussion

GUI and Swing Basics:

  • Introduction to AWT

  • Introduction to Swing

  • Difference between AWT and Swing

  • Event

  • Handling Events

  • Listener interface and adaptor classes

  • Group Discussion


  • Process,Thread, Context Switching

  • Multiprocessing Vs Multi threading

  • Program As An Single Thread

  • Creating Thread By Extending Thread Class

  • Implementing Runnable Interface

  • Group Discussion

  • Thread States

  • Synchronization

  • Inter thread Communication

  • Demon Thread

  • Thread Group

  • Group Discussion

File I/O:

  • Understanding Stream And It’s Advantages

  • IO Hierarchy

  • Input Stream And Output Stream Classes

  • Filter Streams

  • Buffered Streams And Data Streams

  • Readers Hierarchy

  • Serialization

  • Some Other Important Classes(File)

  • Group Discussion


  • Undersanding JDBC

  • JDBC Drivers


  • JDBC Type 1

  • JDBC Type 4

  • Prepared Statement

  • Callable Statement

  • Working with multiple databases

  • Batch Updates

  • ResultSet and Database Metadata

  • Group Discussion


  • Annotations Overview

  • Built In Annotations

  • Custom Annotations

  • Group Discussion

Java Updates:

  • Enum With Methods (Jdk 1.5)

  • Navigable Maps And Navigable Sets (Jdk 1.6)

  • Varargs (Jdk 1.5)

  • JDBC 4.0 features (Jdk 1.6)

  • String in switch (Jdk 1.7)

  • Multiple exception handling, Try with resource (Jdk 1.7)

  • Lambda expression (Jdk 1.8)

  • Pipelining and Streams(Jdk 1.8)

  • Date and Time API(Jdk 1.8)

  • Default method(Jdk 1.8)

  • Group Discussion

What are you waiting for? Book your seats in one of the best Java courses in Pune, now !

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Explain In Detail About Kotlin Frameworks

For JVM and Android development, Kotlin is the statically typed alternative Java language which exhibits signs of developing it into the big leagues which gets the assistance in development frameworks. Kotlin is now assisted by the Spring Framework for instance and new frameworks such as Javalin and Ktor are assisted by Kotlin.

1. Kotlin frameworks: Spring Framework Assistance :

The most familiar and respected Java framework exhibits dependency injection which assists in the Spring 5.0 version unveiled this year. Kotlin extensions are assisted by Spring 5.0 which offers an alternative to the utility classes and Koltin specific class hierarchies along with additional Koltin features to Spring itself.

In Spring 5.0, a routing domain-specific language called DSL developers use the Spring Functional Web API for accessing Spring’s functional web framework.

For writing annotation-based applications you can use Kotlin for writing for the companion Spring Boot technology which constructs production-ready, standalone Spring applications.

Read More :  Top 4 Java Web Frameworks Built For Scalability
2. Kotlin frameworks: Support in the Vert.x framework :

Kotlin is assisted by the version 3.5 of the Eclipse Foundation’s Vert.x JVM framework for performing asynchronous events and processing. For the purpose of web development and enterprise, Vert.x is event-driven and nonblocking and therefore applications can manage concurrency with fewer threads and at scale.

3. Kotlin frameworks: Spark Framework for web apps :

Kotlin DSL is added by Spark which is a web framework for Java development which is meant for building Kotlin and Java 8 applications. For Java and Kotlin developers, Spark offers a venue for building costly web apps with small boilerplate code through a declarative syntax.

It is not similar to Apache Spark project for data processing, Spark can be meant for building REST APIs and it also assists template engines. Microservices are developed with Spark for serving JSON in less than ten lines of code.

Read More  : Java’s Spring Framework gets a new competitor
4. Kotlin frameworks: Ktor framework for connected apps :

Kotlin developer JetBrains has developed the new Ktor framework for JVM scenarios and it accepts the Kotlin’s strongly typed nature and provides strongly typed endpoints and the ability for exchanging data with classes shared among platforms. A multiplatform application framework is offered by it for the development of connected applications.

Pipeline capabilities of Ktor for HTTP processing requests and APIs use Kotlin coroutines for providing an asynchronous programming model. Lambdas function calls are Ktor APIs.

5. Kotlin frameworks: Javalin REST API library for web apps :

In early November, having just reached its version 1.0 stable and Javalin is considered a lightweight web framework for Java and Kotlin taking inspiration from the Koa and Spark web frameworks. A full framework is not a Javalin but a REST API library. It relies on Kotli along with a few functional interfaces written in Java.

Read More :  Best Frameworks Programmers Should Learn in 2018

Model View Controller (MVC) concept in Javalin is not available rather it assists template engines, web sockets, and static file serving. An embedded jetty server is also present as a template and markdown render.

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How To Become A Successful Java Developer

Here are few tips mentioned on how to become a Java developer and how to learn Java programming skills and become a professional in Java coding:

1) Good knowledge of Oops principles and basic foundation:

The basic foundation of Java is object-oriented programming and Java developers must be strong in it. There is no possibility of admiring the beauty of Java language without OOPS knowledge. When the developer is not that experienced in OOPs concept, it is not possible to appreciate Java language. It is not just about learning the definitions and principles of OOPs because of the knowledge that the developers acquire and posses speaks a lot in designing the OOP solution.For becoming an excellent Java developer, there must be a sound knowledge possessed by the developer in polymorphism, design patterns, inheritance, object modeling and other basics.

2) Skilled in core API’s:

Java developer must be skilled in few portions like constructs and core APIs. You can exhibit yourself as an excellent Java developer, the developer must possess good experience on core APIs like collections, java.lang, I/O, Threads, Exceptions, generics, and JDBC. It does not matter what kind of framework is used for web application development because a very good knowledge of JSP and servlets is very much required.

7 Important Ways To Learn Java Programming Faster

3) Practice Coding:

It is quite simple and easy to look about Java theoretically. It is possible for you to become a good Java developer for implementing the approach and the language limitations and best design practices. The best way for learning Java programming is coding and it helps in becoming a Java specialist.

4) Forum subscription:

You can find lots of people in the world that are working on the same Java technology and struggling for gaining a presence as the best Java developer. Simple concepts and projects are not offering actual real challenges. On a real-time project if a developer actually works then the useless part is there are no solutions found in the official documents. The actual aspect to be achieved by the developer is for subscribing the technology forums when working with new technology. While working there are few issues that needs to be faced by someone else somewhere.

Best Tips For Safe java Programming

5) Blogs and responses:

In the global using Java there are various enthusiastic technology freaks. You can find the varied perspective of the technology on the blog and can be found where lots of bloggers can be found blogging for insights. In this place you can find the way people actually speaking great of the technology and few people speaking rubbish with regards to the framework and giving the reason for the same. Both good and bad aspects are exhibited by a blog of the technology and therefore few of the ones are actually followed and replied.

6) Thorough learning of Java:

A good Java developer is called as the usage of framework. The source code will be understood only by an outstanding developer for various successful frameworks where you can get to know about the internal mechanism and the best practices. In an operational way, this framework can be used.

10 Reasons To Learn Java

7) Developments in technology:

There is a constant change in open source software development. An insight must be gained for getting a full idea on framework where a framework actually comes up in the brand new set of features. To get the solution must be the major issue over here with the current network where a brand new network problem actually solves with a single line of introduction and configuration.

8) Code snippets and utilities must be easier:

The same code may be repeated again and again therefore more time and patience is require for the Java developer. Log4. Properties, JDBC configurations and utilities like reflectionUTils, StringUtils and DBUtils quite handy. For understanding in a better way, this may not be the reason for you to help your colleague who needs a value of a property from object collection. As a Java developer this can make you outstanding.

Learn java programming | Short Introduction to Java

8) Different methodology and development:

There are various methodologies demanded for development currently. Java developer must be proficient in this language with the latest methodology and updating of knowledge like a waterfall, Agile, XP, SCRUM. Agile is required by some of the clients and few of them are satisfied with waterfall model and therefore a good developer must be the best in all the methodologies.

10) Record thoughts:

There are lots of ideas one needs to learn as a Java developer and they would find it better for handling few issues. All you need to do is just record such thoughts and just spread it across the group as it will be beneficial for other Java programmers.

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Best Programming Languages To Learn In 2018

The prime goal of being a programmer is to understand new technologies and programming languages but still there comes a question which language you must learn? Here are few languages that are important and beneficial for you to learn:

1) Kotlin :

If you are considering to learn Android App development then this is the right programming language for 2018. This is the ideal thing to happen in the Android World. Although Java is the best-chosen language by me, there are lots of support received from Koltin and IDEs for eg: IntelliJ IDEA and Android Studio which assists Kotile with Android development.

2) Python :

Java is knocked down currently by Python and it has to become the best programming languages in Academica and Universities. This language has lots of power and is very good to generate scripts. For everything you consider, you can find a python module for whatever you think.

Read More :  Android application development
3) JavaScript :

This language stands the first on the web. It is very much popular because of the rise of frameworks like Angular JS, jQuery, and React JS for making JavaScript quite famous. It is very wise to learn JavaScript sooner as you cannot stay away from the web. There are other libraries apart from Angular JS or React JS like Jquery that rely on JavaScript and this is the reason it is number one language for client-side validation.

4) Java :

One of the very popular, effective and strong programming languages is none other than Java. There are lots of features in Java 8 and now JDK 9 is also released and is a must language to learn in 2018.

Read More :  6 Reasons Not to Switch to Java 8 Just Yet
5) Go :

This is another interesting language to learn in 2018 and it is quite famous and on the later part of this year its usage will definitely increase and the competition among Go developers is also quite less because of less number of people. There are only few Go developers in the world, therefore, you can bag this opportunity right away.

6) C# :

This is definitely a wonderful language for you to learn in 2018 especially for developer GUI. Just refer books like Complete C# Unity Developer.

7) Swift :

If iOS development is what you are thinking about then iPhone and iPad must be taken into account on a serious basis in the year 2018. iOS apps can be developed and it replaces Objective C as the best-chosen language. It has outnumbered objective C.

Read More :  7 Important Ways To Learn Java Programming Faster
8) Rust :

It is quite ideal to learn among the developers. The most loved programming language is the title given to it and has won the price in a Stack Overflow Developer Survey in 2016 and 2017. This is ideal for you even if you are an experienced programmer.

9) PHP :

It is definitely a very good surprise and doesn’t consider it as dead, it is quite lively. PHP is used for making 50 % of the internet websites and therefore you cannot leave away the PHP power. Beginners can learn it as a good starting point.

10) C/C++ :

Last but not the least C and C++ are evergreen languages and being strong with academics alone will not be satisfied. It is good to learn it better from an online course now.

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7 Important Ways To Learn Java Programming Faster

Irrespective of you being in a computer science degree or a developer who is self-proclaimed or self-made a student who is wanting to achieve big in life in the programming industry must definitely make use of these tips to master it:

1) Enjoy doing the code

The mentality of the learner or beginner must be to play with the code irrespective of the subject and this will help you to grasp the concepts in a quicker and interesting way. Although you glance through the complete chapter and understand the theoretical concept you will end up hitting your head on the wall while coding for the first time. You will ponder about the syntax once again to mention to make it work.

2) Learn the fundamentals of gaining the benefits

At first, they may appear easier but the fundamentals of programming always must come first and if you understand them well then it will be easier for learning more concepts. Most of the students just skip through the first chapter but actually, it is the main focus for web development fundamentals and this is the reason you get stuck while learning the advanced step and therefore before ignoring the first chapter please get to know its value and the benefits you will reap in the future.

Learn java programming | Short Introduction to Java

3) Do the coding with hand and the proficiency sharpens as you may need it to secure a job

Nowadays as you can see that Computer monitors are less weighed and hard drives are small and there are lots of powerful programming languages but it is still very difficult to code by hand and is one of the best methods for learning how to program. Irrespective of a whiteboard or notebook you need to be cautious about coding and the syntax. It is not like a computer that you can easily debug the code because you are writing it on a paper and it is very difficult to test its workability. It is very much time consuming but it will help you to groom yourself into the best programmer.

4) You may need help do not hesitate to ask

For becoming the next Steve Jobs you need to learn the program in a faster way with peer feedback from the mentors. You could easily learn all the difficult topics through the course from a totally different perspective. Just be clear about the objectives and do ask questions and doubts. There are lots of developers with passionate individual enjoyment for sharing the knowledge with the peers.

Java: The Most Secure Programming Language?

5) Look out for online resources and wealth of content

If there is no meaning for a specific sense irrespective of codeacademy, lecture, or textbook for having a good confidence and look for different resources to know about the same content. As one source is not easy to learn, it is good to learn different kinds of stuff. This implies you are not clicking on the material delivery. For learning computer programming there are lots of online resources and there are always a post and blog explanation with youtube tutorial for making the material at hand very crystal clear.

6) Avoid the sample code

It is very difficult to understand the working of the sample code. You must run the code and work it out for developing a good understanding. Apart from the additions of instructions and comments the sample code is packed for easy grasping of the reader. Both reading and understanding are quite different therefore you need to write the code on your own for facilitating the learning process more inquisitively.

Career Java Programming: Quick Learning Tips To Master Java Programming

7) Take breaks for debugging

At the time of debugging just avoid or take a break from the bug for a time period and bounce back with a fresh view. This will help you to fix the problem and save you from a headache. This is mostly used when there is no help or assistance available to the fix the issue.

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Best Frameworks Programmers Should Learn in 2018

Just read on the famous frameworks you need to know in the year 2018. There are lots of modifications in developing the Angular JS and React JS and it is the correct time for you to know about them.

1) Angular JS :

This is regarded as a JavaScript framework and it is on the prime list of things to think about it in 2018. A client-side solution is offered by it. Angular JS can be used by you for creating dynamic web pages on the client side. Dependency injection, declarative templates, and integrated practices solve the development challenges on the client side.

2) Node.js :

It is quite clear that JavaScript is the first programming language and Node.js which has a great thing to play on. On the client-side, JavaScript is traditionally used and it is used with HTML for offering dynamic behavior on the client side. A web browser is a basis for running it but Node.js permits you for JavaScript running on the server side.

Read More: Using Javascript Frameworks and Google’s Crawling Suggestion

It is also regarded as an open-source and for executing JavaScript code server-side the cross-platform JavaScript run-time is used. Node.js can be used by you for creating dynamic web pages on the server side before sending them to the client.

3) Spring Boot :

Spring framework has been used by since a long time and when Spring boot was first introduced with relative lack of configuration, a composition of Spring-based Java application with the help of Spring boot was quite easy using the main() method and that is why it is quite important to learn in 2018.

4) React :

Another JavaScript library or framework called as React for building user interfaces. This is why Instagram, Facebook and a group of individual developers and corporations. Web developers are permitted to develop large web-applications for changing over time and there is no need to reload the page.

Angular and React is split with the web development world and it depends on you to choose it. It runs based on the circumstances for instance if you React is what you are working on then it is important for you to learn React.

Read More :  A Brief Introduction To Spring Framework

5) Bootstrap :

For designing websites and web application it is another famous open-source and front-end web framework. Twitter brought this and HTML and CSS based design templates were offered by Bootstrap for forms, typography, navigation, buttons and other interface components along with optional JavaScript extensions.

6) jQuery :

For ruling the world, this JavaScript framework is used. Since a long time jQuery is used and every developer must know about jQuery. Client-side scripting can be done easily.

7) Spring Security 5 :

Security does not have any substitute and in the year 2018, this is quite significant. Both web security and spring security mean the same and therefore it is very important to brush yourself above it in 2018.

Read More :  Introduction to Apache Spark

8) Apache Hadoop :

The prime target of 2018 is Big Data and Automation and this is the reason most of the companies are into it. If you want to become a programmer then you need to use Hadoop and Spark. A framework called as Apache Hadoop permits distributed processing of big data sets among clusters of computers with the help of simple programming models.

9) Apache Spark :

Popularity is gained with the help of another big data framework and it is fast, in-memory data processing engine with expressive and elegant development. Datasets must be accessed in a fast and interactive way by SQL workloads therefore in such cases API is the best thing to use for the data workers.

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Best Java Exception Handling Interview Questions

1) Explain an exception?

The logical errors are represented by the objects called as exceptions that occur during run time and happens during run time and it enters into the ambiguity state.

JVM creates the objects automatically for representing these run time errors called as Exceptions.

2) Explain the difference between an error and an exception?

Serious problems are indicated by an error called subclass of throwable that is a reasonable application must not try to catch.

A subclass of Throwable is called an error that shows the serious problems of a reasonable application must not try to catch. There are lots of errors with strange conditions.

3) Explain the way exceptions are handled in Java?

With the help of try catch blocks, exceptions can be handled.

For generating the exceptions, the statements need to have try block because when there is an exception shown in a try block it will be assigned with the next exception class object in catch block.

Read More :  Do you know about Exception Handling in Java?
4) Explain the super class of Error and Exception


5.Exceptions are defined in which java package


6.Explain throw keyword in java?

An exception is thrown manually with the help of throw keyword.

For suspending the execution, whenever needed the functionality relies on the user-defined logical condition for throwing the keyword to throw the exception.

7. Is it possible to have try block without catch block?

You can use try block without catch block by using finally block

Try with finally block is assisted by Java

It is quite familiar that block will get to know when there is an exception that happened in a try block, Except System. Exit () will have its execution always.

8. Explain unreachable blocks in Java

Unreachable blocks are regarded as block of statements to which the control cannot reach in any case.

Java doesnot support unreachable blocks.

Read More :  What is Exception Handling in Java?
9. Explain user defined exception or custom exception in Java

Custom exceptions can be defined by us over here by extending the Exception class

A constructor must be written by us for passing the message.

User defined exception in Java.

10. Explain the various ways of print exception message on console

In Java there are three ways to find the details of the exception.

They are:

1. Using an object of java.lang.Exception

2. Using public void printStackTrace() method

3. Using public String getMessage() method.

11. Is it possible to write return statement in try and catch blocks

It is possible to write return statement of the method in try and catch block

For using it there is a need to follow few rules.

12. In finally block is it possible to write return statement?

In finally block, there is a possibility to write return statement of the method.

Read More :  Java Exceptions Handling
13. Explain the difference between throw and throws

User defined exceptions are thrown with the help of throw keyword.

The information about unhandled exceptions of the method to the end user is done with the help of throws keyword and it can explicitly offer this kind of an information.

14. Is it possible for us to change an exception of a method with throws clause from unchecked to checked while overriding it?

Not possible

In sub class, if super class method throws exception then you need to mention the throws with the same class or the sub class exception.

Therefore it is not possible to change from unchecked to checked.

15. Explain the rules for following the overriding in super class method for throwing the exception

If checked exception is thrown by the sub class then the super class must throw the same or super class exception of this.

If checked or unchecked exceptions are thrown by the super class method then it is not necessary to put throws in a sub class overridden method.

In sub class, if super class method throws exceptions then you need to mention the throws for using the same class or its sub class exception.

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Best 10 Spring Boot Interview Questions

In this article, you will 10 Spring Boot Interview questions with answers. Let us see few Spring Boot Interview questions:

1) Explain Spring boot

For making production ready, the Spring boot will make it simple for you and it has an excellent view of developing Spring application quickly. Convention over configuration is followed by it. In easier terms, there is default configuration for lots of Spring projects and there is no need for lots of bootstrap for any spring application.

2) Explain the usage of a boot in your application?

Spring application can be created with spring boot to make it simple as mentioned earlier and it can save a good amount of time and efforts.

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3) Explain the disadvantages of Spring boot

For turning your old spring application to Spring boot it is not a direct approach and takes a lot of time.

4) How is it possible to override the default properties in Spring boot project?

There are lots of properties offered by Spring boot that can be overridden by giving them with application properties.

5) Explain the running of Spring boot application on a custom port?

In application properties, there is a need to simply put server port properties.

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6) Explain Spring boot starter and its usage?

There are lots of starters that is present in Spring boot which is a group of convenient dependency descriptors that can include your prom.xml.

7) Can Spring boot be used by us with applications that are not using Spring?

It is not currently feasible. Spring applications are the basis for Spring boot.

8) Explain the configuration name file for you to use in Spring boot?

In Spring boot projects, configuration files are used along with properties. It is quite significant for usage to override various default configurations.

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9) Explain the actuator in Spring boot?

The most significant feature of Spring boot is Spring boot actuator. It is used for accessing present state of running an application in production environment. You can find lots of metrics for you to check the present state of the application.

10) How is spring security implemented with Spring boot application?

In Spring boot application there is a usage of Spring security for very little configuration. In pom.xml there is a need for you to include spring-boot-starter-security. You must also create Spring config class for extending WebSecurityConfigurerAdapter and override method for requiring to achieve security in Spring boot application.

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Best Java Libraries For Developers

Currently, there are lots of Java libraries available for you but tried and tested libraries are the most preferred by the developers. Here are few essential third-party Java libraries that developers must understand.  They are free and exhibit wonderful features that are useful for all developers from freshers to professional coders.

1) Commons Math

A free mathematics library offering various numerical analysis, geometry, complex numbers, linear algebra and more is none other than Commons Math. There are statistical and mathematical components with self-contained and lightweight for addressing programming issues like linear equations solving systems, machine learning, curve fitting and much more.


For the purpose of designing Java games, LWJGL 3 (Lightweight Java Game Library) is a cross-platform library. High performance and direct access are offered by this library which is a standalone platform to native APIs for graphics development (OpenGL), audio (OpenAL), and parallel computing(OpenCL) applications.

3) Jsoup

HTML is parsed in Java with the help of HTML parser library in Jsoup to the same DOM like modern browsers. It permits parsing HMTL from a URL, string or file and manipulating HTML elements, attributes, and text. For the purpose of manipulating and extracting data, there are convenient API for the best CSS, DOM, and jquery-like methods. For data extraction, there are several selector syntaxes like Jquery-like and regex.

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4) SWT

For Java, there is an open-source widget library designed called as the Standard Widget Toolkit or SWT. For offering efficient and portable access it was designed with user interface elements of the operating system where it is used. There are lots of development tools from widgets, sample snippets, documentation, and examples.

5) FreeHEP

High Energy Physics is involved for developing applications that are quite a useful library for use. Java code’s sharing and reusability are encouraged by FreeHEP in high energy physics and various other components like a vector graphics, HepRep, PostScript Viewer and much more. Only certain parts can be used by you without the need for an entire library by FreeHEP to decrease the dependencies.

6) Apache Log4j

Loggin is enabled by Java and for this purpose Apache Log4j, a logging library is used without the need for changing the application binary. The log statements are designed by the Log4j package to stay in the shipping code without heavy performance costs.

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7) Jackson

A standard JSON parser library for Java called Jackson is the rapid and user-friendly library which comprised of a suite of data processing tools for Java and JVM like the JSON parser, data-binding library and other data format modules like CBOR, BSON, AVRO, CSV, XML and more.

8) JfreeChart

A robust API is featured by a free Java chart library called as JfreeChart to assist help developers to express professional looking charts on both server and client-side applications. Bar charts, pie charts, Gantt Charts, histograms etc are created by it. There are various output formats like JavaFX components and Swing which is supported by it.

9) Google Guava

There are lots of Java-based projects which have an open source Java libraries called as Google Guava like primitives support, functional programming, string processing, common annotation, etc. The ultimate motto is to make Java more pleasant language by testing preconditions easily and the implementations must be simplified by it for object methods and simplifications of exception and error propagation and examination.

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10) Hibernate ORM

Database tables and Java classes can be mapped by the object or relational mapping library called Hibernate ORM. For developing applications the developers are permitted and persistent classes are developed by the data with the help of natural object-oriented idioms.

11) Java WordNet Library (JWNL)

The WordNet relational dictionary is accessed by the JWNL Java API for developing NLP applications. Java generics, dictionaries, and improved database support are assisted by the extended library.

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Explain The New Features In Java 7

There are lots of features introduced by Java 7 in Java programming language and they are trying catch with a resource, String in Switch etc and with the introduction of new file API in Java further there are lots of modifications in Java Development API and apart from that, there are lots minor changes.

1) Permit using String in Switch Case :

In the earlier versions of Java, it was not possible to use String in Switch or a case statement. Since the enum was unveiled in Java 5, the idea for using String in Switch case was present. It was possible to use Enum in Switch case but it is not possible to do the same thing with String. After the entry of JDK 7, String can be used in the Switch case.

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2) Various Exception in one catch block :

It is one of the prime features which bags the thought in your mind when listing Java 7 features. There is a possibility to catch multiple Exception in one catch block in JDK 7. In Java 7, it is called as multi-catch block feature. In Exception handling, a significant enhancement called Java 7 has been made as it will decrease the clutter in Exception handling code in Java.

3) Automatic resource management or ARM blocks :

This feature is similar to the ones in previous Java 7 version called as Automatic resource management (ARM blocks) which also implies try with resource block is another important enhancement in the field of Exception handling in Java. Automatic closing of a resource is allowed by ARM blocks eg: Streams, Files, etc which is unveiled inside try block.

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4) Fork-Join framework in Java 7 :

This feature is mostly asked in the Java interview questions there is a possibility for Fork join framework in Java 7 but it is an individual JSR. In Java 7 it has been included as a new feature to make it part of standard Java 7 core library. Codes can be written with the permission of Fork join and this benefit of multiple cores is present in modern servers.

5) Diamond operator <> for type interface :

Generics in Java are introduced by Java 5 where the programmers are not happy with the verbose and produce duplicate code which is apt due to object creation of para class in Java and you need to give type parameters in both right and left-hand side. A new Java 7 feature called diamond operator <> offers type interference while making Generic class objects. It is possible to get type interference without the Java 7 usage creating Factory method in Java. Type interference can be achieved easily with the help of diamond operator in Java 7.

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