How to Read a File in Java: A Comprehensive Tutorial

In this Tutorial, we will learn about how to read a file in Java. File manipulation is a fundamental aspect of programming, especially when dealing with data processing and storage. Java provides robust libraries and classes to handle file operations efficiently. In this in-depth tutorial, we will explore the various techniques and best practices for reading files in Java.

Understanding File Processing in Java

Before delving into file reading techniques, it’s crucial to understand the basics of file processing in Java. Files are represented by the class, which encapsulates the path to a file or directory. Java offers multiple classes like FileReader, BufferedReader, and Scanner to facilitate reading operations.

Reading Text Files Using FileReader and BufferedReader

Using FileReader and BufferedReader Classes

The FileReader class is used for reading character files. It works at the byte level, reading streams of characters. BufferedReader class, on the other hand, reads text from a character-input stream, buffering characters to provide efficient reading.


public class TextFileReader {
    public static void main(String[] args) {
        String filePath = "example.txt";
        try (BufferedReader reader = new BufferedReader(new FileReader(filePath))) {
            String line;
            while ((line = reader.readLine()) != null) {
        } catch (IOException e) {

In this example, we read a text file line by line using FileReader wrapped in a BufferedReader.

Reading CSV Files Using Scanner Class

CSV files are widely used for storing tabular data. Java’s Scanner class simplifies the process of reading from various sources, including files. Let’s see how we can read data from a CSV file.

Reading CSV File Using Scanner

import java.util.Scanner;

public class CSVFileReader {
    public static void main(String[] args) {
        String filePath = "data.csv";

        try (Scanner scanner = new Scanner(new File(filePath))) {

            while (scanner.hasNext()) {
                System.out.print( + " ");
        } catch (FileNotFoundException e) {

In this example, the Scanner reads the CSV file and separates values using a comma (,).

Best Practices and Error Handling

Handling Exceptions

When dealing with file operations, exceptions such as FileNotFoundException and IOException must be handled properly to ensure graceful error recovery and prevent application crashes.

Using Try-With-Resources

Java 7 introduced the try-with-resources statement, which ensures that each resource is closed at the end of the statement. It simplifies resource management and reduces the chance of resource leaks and related issues.

try (BufferedReader reader = new BufferedReader(new FileReader(filePath))) {
    // Read file content here
} catch (IOException e) {


In this extensive tutorial, we explored various techniques for reading files in Java, ranging from basic text files to more complex CSV files. Understanding the classes and methods provided by Java’s I/O packages is essential for effective file processing.

Remember to handle exceptions diligently and use try-with-resources to manage resources efficiently. With the knowledge gained from this tutorial, you can confidently read and manipulate files in your Java applications, ensuring smooth and reliable data processing.

By incorporating these practices and techniques into your Java projects, you are well-equipped to handle a wide array of file-reading scenarios, making your applications more versatile and robust. If you face any problem to read a file using java programming then you can search for Java assignment help. Happy coding

Java Database Connectivity (JDBC) – A Simple Tutorial for Students

Welcome, future developers! If you’re looking to connect your Java applications with databases, you’re in the right place. Java Database Connectivity, commonly known as JDBC, is the bridge that links them together. It’s a powerful tool in a developer’s toolkit, allowing seamless interaction between Java and various databases. Dive into this tutorial, and by the end, you’ll have a clear understanding of the basics. Let’s embark on this journey together!

JDBC Architecture

When you think of JDBC, visualize it as a bridge. This bridge connects your Java application to a database. Central to this are the JDBC Drivers – they facilitate the actual connection. As for the inner workings, the JDBC API provides key components: DriverManager manages a list of database drivers, Connection connects to the actual database, Statement lets you run SQL queries, ResultSet fetches results, and PreparedStatement helps with pre-compiled SQL statements.

JDBC Architecture Diagram

Setting Up Your Environment

Before we dive deep, let’s set the stage. First, you’ll need to install a JDBC driver specific to the database you’re using. Now, balancing coding with school can be overwhelming. If you’re swamped with assignments, consider using services like Essay Pro to manage your workload. This way, you can allocate more time to coding. Once you’re set, proceed to set up a database for testing. This foundation is crucial for hands-on learning ahead.

Establishing a Connection

First things first: to chat with our database using Java, we need to establish a connection. Begin by loading the JDBC driver – think of it as dialing a friend’s number. Once that’s done, you can actually ‘call’ or connect to the database. It’s like establishing a direct line of communication between your Java code and the database.

try (Connection connection = 
        DriverManager.getConnection(URL, USERNAME, PASSWORD)) {
} catch (Exception e) {

Executing SQL Statements

Now that we’re connected, let’s converse! Start by creating a Statement object. This is your tool to “speak” SQL. Whether you want to ask the database a question (query) or tell it to do something (update), the Statement object has your back.

Statement statement = connection.createStatement();
String query = "SELECT * FROM book";
ResultSet books = statement.executeQuery(query);

Working with ResultSet

So, you’ve asked your database a question. Where’s the answer? Enter ResultSet. As you iterate through the ResultSet, it’s like flipping through the pages of a book, gathering the information you asked for. Want specifics? You can retrieve data based on the column, making it easy to pinpoint exactly what you’re after.

while ( {
    System.out.println(books.getString("isbn") + ", " +
            books.getString("title") + ", " +

Using PreparedStatement

Imagine sending a tailor-made invitation; it’s more efficient and safer. That’s what PreparedStatement offers over regular statements. This nifty tool lets you create SQL statements with placeholders, reducing errors and speeding things up. Once your structure is set, you can easily customize the message by filling in specific parameters. It’s like having a template for smoother, more personalized database interactions.

String orderDetailQuery = """
        INSERT INTO purchase_order_detail (order_id, product_id, quantity, price)
        VALUES (?, ?, ?, ?)

PreparedStatement detailStmt = conn.prepareStatement(orderDetailQuery);
detailStmt.setLong(1, 1L);
detailStmt.setInt(2, 1);
detailStmt.setInt(3, 10);
detailStmt.setBigDecimal(4, new BigDecimal("29.99"));

Handling SQL Exceptions

Even in the world of coding, things don’t always go as planned. When your Java application and the database have a miscommunication, SQL exceptions occur. But don’t fret! By catching an SQLException, you’re prepared to deal with these hiccups. This allows you to gracefully handle any bumps in the conversation. And the best part? You can retrieve specific error information, give you insights to troubleshoot and keep the conversation flowing smoothly.

Batch Processing with JDBC

Ever thought of sending multiple messages at once instead of one by one? That’s batch processing for you. In JDBC, this means executing multiple SQL commands in a single go. The perks? Faster operations and reduced server round trips. With addBatch() you line up your messages, and executeBatch() sends them all together in a neat package.

try (Statement statement = connection.createStatement()) {
    statement.addBatch("INSERT INTO product (code, name) " +
            "VALUE ('P0000006', 'Championship Manager')");
    statement.addBatch("INSERT INTO product (code, name) " +
            "VALUE ('P0000007', 'Transport Tycoon Deluxe')");

    int[] updateCounts = statement.executeBatch();
    System.out.println("updateCounts = " + Arrays.toString(updateCounts));
} catch (SQLException e) {

Transactions in JDBC

Think of a transaction as a promise. You’re telling the database, “I’ll make a series of changes, and if everything goes smoothly, let’s finalize them.” If something’s amiss, you can revert to the start, ensuring data integrity. This commitment is done using the ‘commit’ command. However, if there’s an issue, ‘rolling back’ undoes the changes, keeping your data safe and sound.

try (Connection conn =
             DriverManager.getConnection(URL, USERNAME, PASSWORD)) {

    String orderQuery = """
            INSERT INTO purchase_order (username, order_date)
            VALUES (?, ?)

    try (PreparedStatement stmt = conn.prepareStatement(orderQuery,
            PreparedStatement.RETURN_GENERATED_KEYS)) {
        stmt.setString(1, "jduke");
        stmt.setDate(2, new Date(System.currentTimeMillis()));

        ResultSet keys = stmt.getGeneratedKeys();
        long orderId = 1L;
        if ( {
            orderId = keys.getLong(1);

        // This is an invalid statement that will cause exception to
        // demonstrate a rollback.
        String orderDetailQuery = """
                INSERT INTO purchase_order_detail (order_id, product_id, quantity, price)
                VALUES (?, ?, ?, ?)

        PreparedStatement detailStmt = conn.prepareStatement(orderDetailQuery);
        detailStmt.setLong(1, orderId);
        detailStmt.setInt(2, 1);
        detailStmt.setInt(3, 10);
        detailStmt.setBigDecimal(4, new BigDecimal("29.99"));

        // Commit transaction to mark it as a success database operation
        System.out.println("Transaction commit...");
    } catch (SQLException e) {
        // Rollback any database transaction due to exception occurred
        System.out.println("Transaction rollback...");
} catch (Exception e) {

Connection Pooling

Remember those kiddie pools filled with balls? Connection pooling is kinda like that, but for database connections. Instead of making a new connection each time, you just grab one from the pool. It’s faster and conserves resources. When you’re done, toss it back! And setting up? It’s a one-time thing to ensure a reservoir of ready connections.

Closing Resources and Best Practices

Always tidy up after a chat! In JDBC, this means closing the Connection, Statement, and ResultSet to free up resources. Ever heard of the try-with-resources statement? It’s a Java gem that ensures resources are closed properly. And a quick tip: if managing JDBC feels overwhelming with your academic load, consider the best dissertation writing service to help with school, so you can focus on coding right.

try (Connection conn =
             DriverManager.getConnection(URL, USERNAME, PASSWORD);
     Statement stmt = conn.createStatement();
     ResultSet rs = stmt.executeQuery("SELECT * FROM product")) {

    while ( {
        String code = rs.getString("code");
        String name = rs.getString("name");

        System.out.println("Code: " + code + "; Name: " + name);
} catch (SQLException e) {

JDBC Limitations and Alternatives

JDBC is great, but it’s not perfect. For complex applications, it might feel a bit low-level or verbose. Enter ORM tools. They offer a more intuitive way to interact with databases, abstracting away much of the SQL. Think of them as an evolved, sophisticated version of JDBC for certain use cases.

Summary and Next Steps

And that’s a wrap! You’ve journeyed through JDBC’s landscape, grasped its core, and glimpsed its limitations. What’s next? Dive deeper, explore more advanced resources, and keep building. The coding world awaits your creations!

10 Best Career Options for Java Developers in 2023


The programming world is changing, and opportunities await aspiring coders. With robust support from major technology giants and an ever-expanding job market, now is the time to start your career as a Java developer.

Whether you’re a professional looking to break into the field or a beginner with no experience who wants to get a java developer job with no experience, we’ve rounded up ten exciting options that are sure to put you on your way to success. From mobile app development to software engineering, this article explores the best career options for you in 2023!

Will Java Developers Still Be in Demand in 2023?

If the ever-increasing number of job posts—specifically for Java developers at Jooble is anything to go by, Java developers will have no shortage of job offers in 2023. Also, as an open-source language, Java is widely used for enterprise development, mobile applications, web applications, and artificial intelligence projects.

In addition, its inventor – Oracle –has regularly added new features to the language over the last two decades. This has allowed Java developers to stay ahead of the curve when it comes to coding skills.

Moreover, as technology advances, more organizations are turning to Java developers to meet their needs. For example, many businesses are transitioning their entire infrastructure from monolithic services and adopting microservices architectures.

This trend requires skilled Java developers who understand how microservices work and can develop them effectively. The same goes for AI-driven systems that rely heavily on Java development expertise.

All things considered, it means there will still be plenty of demand for talented Java developers in 2023 and beyond. Here are ten of the best career options for Java developers in 2023:

1. DevOps Engineer

A DevOps Engineer is a software engineer who works collaboratively with development and operations teams. They ensure that digital projects are delivered quickly, efficiently, and without errors.

They are responsible for deploying software, maintaining application stability, and automating workflows. Essentially, they are the bridge between development and operations teams, ensuring communication flows within an organization.

Becoming a DevOps Engineer requires knowledge of programming languages like Java, and scripting languages like Ruby or Python. It also requires an understanding of automation tools like Jenkins or Chef; source code management platforms like Git, and cloud-based solutions such as Amazon Web Services or Microsoft Azure.

Becoming a DevOps Engineer could be a great choice for Java developers looking for the best career options in 2023. This is because there is an increasing demand for this role in organizations worldwide.

2. Artificial Intelligence Engineer

Artificial Intelligence (AI) is a rapidly growing field. As a result, companies are looking for developers with expertise in AI technologies to help them stay competitive.

AI Engineers are responsible for creating intelligent systems that can perform tasks independently and operate with human-like accuracy and speed. Becoming an AI Engineer requires knowledge of Java, Python, R programming language, Natural Language Processing (NLP), Machine Learning algorithms, and more. For Java developers in 2023, this could be a great option, as AI technologies will only increase in the coming years.

3. Solution Architect

A Solution Architect is a technical leader who designs and implements software solutions to solve business problems. They create high-level designs that integrate various systems, applications, and services, maximizing efficiency and scalability.

To become one, you’ll need to understand software engineering fundamentals such as object-oriented programming (OOP) and system design concepts like architecture patterns and frameworks. Additionally, you’ll need to be well-versed in the latest technologies and trends in the industry, such as Kubernetes and microservices.

To become a Solution Architect, the best approach is to start by gaining experience with coding; then pursue additional training focused on system architecture principles and design patterns. Having some relevant certifications will also give you an edge over other candidates applying for positions.

4. Data Scientist

Data Scientists manage, analyze, and interpret data to extract valuable insights. They use various technologies and methods such as big data analytics, machine learning algorithms, natural language processing (NLP), statistical analysis, etc.

Becoming a successful Data Scientist requires good knowledge of programming languages like Java along with strong mathematical and statistical skills. You’ll also need to be well-versed in databases, machine learning tools, data visualization frameworks, and modern algorithms such as deep learning neural networks. Data Scientists are in high demand these days due to organizations’ ever-increasing use of data-driven decisions.

5. Scrum Master

A Scrum Master is a role that is essential for software development teams that employ agile methodology. A Scrum Master is responsible for organizing and managing a team’s workflow during the phases of development.

They’re responsible for ensuring that tasks and deadlines are met. They also facilitate conversations around potential roadblocks or issues.

For Java developers looking to become a Scrum Master in 2023, it is essential to understand the fundamentals of agile software development, such as its core tenets and techniques, before attempting to take on the role. Being fluent with related frameworks, like Extreme Programming and Lean Development, can also be beneficial. It would also help to have good communication and interpersonal skills and knowledge of your team members’ strengths and weaknesses to manage their assigned tasks effectively.

6. Mobile Developer

Mobile Developers specialize in creating applications for mobile devices such as smartphones and tablets. They use coding languages like Java, HTML5, and CSS3 to create user interfaces and write code that interacts with an application’s backend systems.

In 2023, the demand for Mobile Developers is projected to increase exponentially. Mobile applications will become increasingly crucial for businesses as more organizations move their processes and services online.

To become a successful Mobile Developer in 2023, you’ll need to understand software development and mobile design basics. Additionally, understanding modern trends such as augmented reality (AR) can also be beneficial.

7. Project Manager

Project Managers are responsible for overseeing the development process from start to finish. They work closely with teams of software developers, UX/UI designers, marketers, and other professionals to ensure that each project is completed on time and within budget.

Project managers need strong communication skills and an understanding of software development processes. They should be familiar with popular project management tools like JIRA and Trello.

8. Database Administrator

Database Administrators are responsible for creating, maintaining, and securing databases. They use programming languages like Java to develop database applications.

In 2023, Database Administrators will need to be experts in a wide range of technologies such as SQL, NoSQL, OLTP/OLAP systems, and cloud computing platforms. Additionally, knowledge of related areas such as machine learning and big data can also be beneficial.

9. Security Analyst

Security Analysts are responsible for protecting networks and systems from cyber threats such as malware, viruses, and unauthorized access. They use programming languages like Java to develop security protocols, monitor networks for suspicious activities, investigate incidents and analyze system vulnerabilities.

To succeed in this role in 2023, Security Analysts need to understand cyber-security best practices thoroughly. They should also be knowledgeable about the latest threats and technologies, such as biometrics, artificial intelligence (AI), and blockchain.

10. Cloud Solutions Architect

Cloud Solutions Architects design and implement cloud-based systems for businesses. They need to understand the fundamentals of cloud computing, including infrastructure as a service (IaaS), platform as a service (PaaS), and software as a service (SaaS).

In 2023, Cloud Solutions Architects should have experience with popular cloud computing providers such as Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform. Additionally, they should know the principles of DevOps, microservices, and containerization.

In summation, these are the ten best career options for Java Developers in 2023. With a good understanding of software development principles and the latest technologies, you can pursue any of these roles and excel in them. Good luck!

Frameworks in Java

Do you know some frameworks of Java? Have you ever thought about the frameworks available in the Java programming language? Let’s experience & know briefly about the frameworks of Java.

But before we start discussing the types of frameworks in Java & what is frameworks for Java, let us come to know what is a framework called in normal life.

The framework is a type of template by which we can reduce our work. This means the frame of the previous work is ready. You just need to modernize it. Then you can prepare a new thing.

Finding it is quite difficult to understand. Let us take one example to clear the idea.

Suppose, yesterday you prepared a panner dish for your parents. But after taking the dinner, you find out that there is a large amount of gravy left in the pot. But there is not any panner left in the pot. The dish was so well-prepared.

So what will you do in such cases? Do you throw the remaining gravy off the dish?

No! you have decided to preserve the gravy. And the next morning, you modernize the gravy & prepared a new dish having chicken from that gravy.

This is the proper example of a framework. The gravy of the panner dish was your framework. You just modernize it, added chicken to the dish & prepared a new dish. This same thing happens in frameworks for Java.

What Is Frameworks

The framework is the predefined snippet of the code. It is very difficult to complete an application program by any developer. That is why in the framework a series of classes & functions are developed according to the necessity of the developers. Developers just need to put their written codes there. The remaining things will be completed by the framework. There are different frameworks are present for different programming languages.

Like frameworks of Java, there are JavaScript frameworks also. JavaScript framework performs the same operation. It is like the gravy of the dish which we have stated above. Just we need to add codes in the frameworks. As we have added chicken to the gravy in the above example.

Frameworks Of Java

We used to write our codes in the Java programming language by simple Java programs. But those simple Java programs will not be needed in the companies. The companies will not pay for developing a calculator in Java programming language. There we need to develop a large size of code. Developing such codes is very difficult. For that purpose, there are frameworks of Java.

These frameworks work as the model. We need to design the model on our own. We have to complete the model structure in such a way that it will fulfill the necessity of the company. Frameworks of Java are like the structure of a building. We need to build the walls; we need to decorate to live in them. If you want to get homework help Java then you can contact and pay for coding homework help.

Types Of Frameworks In Java

There are many types of frameworks in Java. According to the need of the developer, they can choose the desired framework. As per the necessity of the developer, they can choose the proper framework. Choosing an improper framework creates problems while developing the application. Here, we are going to make a list of the frameworks which play an important role in every life of Java developers.

1. Spring Frameworks Of Java

The Spring framework of Java is essential. Any Java application can develop with the help of Spring. Sometimes there may be a problem related to coupling. Due to tight coupling, there may be some issues in different classes in Java. Spring helps to create loose coupling. This change in one class, will not affect the other class.

2. Hibernate Frameworks Of Java

Sometimes there may be a problem related to the database usage by Java. The JDBC application sometimes creates difficulties while developing a table at the object level of the database. These developers need to use Hibernate. The query language used by Hibernate is known as the Hibernate Query Language (HQL). The object-level relationship can be easily made up by the Hibernate.

3. Struts Frameworks Of Java

Struts is completely an open-source platform. Anybody can download & use it for free. It helps to develop a convenient application. It helps to view the model through the easy process & user interaction. There is an XML file that helps to generate & gather the result of the analysis in a better way.

4. Dropwizard Frameworks Of Java

Dropwizard is another type of framework in Java. It is a wizard. It helps to complete the application by configuring it. It helps to complete the application by logging, configuring & changing the metrics of the application. It takes libraries to form the Java ecosystem & provides a single framework interface.

5. Grail Frameworks Of Java

It is the most important type of framework in Java. It is appropriate for beginners. Beginners who want to learn the frameworks of Java, first need to know the Grail. But it is not able to run with Java programming language. It runs with the Groovy language. Groovy language is similar to the Java programming language. But it has more features than Java. Also, it is very easy. That is why it is advisable to start the journey of the Frameworks of Java with Grail.


As we saw the frameworks of Java are very important. It is advisable to clear the basic concept of Java programming language in a good manner. It is a very important first step.

Frameworks for Java are the building boxes for developing applications related to the Java programming language.

EduBirdie Code Writing Services for Students – Review

We can all agree that computer programming significantly influenced the way our lives look today. There are so many things we use and rely on that would not exist without code writing. The whole online realm would still be an advanced idea. The term source code stands for the layers of knowledge, creativity, and constant effort to make products better in every sense of the word. Most of us, consumers, can’t even conceptualize this building process. We use it without knowing how to make a program or what it takes to reach the final product. For that reason, the slight mystic aura around people who mastered code making is more than well deserved.

Code writing as a profession

To reach a high level of professionalism students who choose this career have to put a lot of work and time into it. This is where EduBirdie and other services can make a huge difference by providing experienced insight. Programming is the set of many tech-related activities that surpasses the simple term “writing code”. In the beginning, the learning curve might go down due to the number of programming languages with Java, C++, PHP, and Python being the most popular ones. There are numerous functions, procedures, concepts, and variables to adopt and apply.

Photo by Christina Morillo

According to programmers, learning how to write code is not the most difficult ever. Once the first phase passes and the logic behind programming have been fully comprehended things will get much easier. In their opinion, the two most important factors are finding the right sources to learn from and a good mentor. A college degree is equally important as practical knowledge, experience, and a smartly built portfolio.

Learning computer programming with EduBirdie

With code writing college assignments even the most confident students can get stuck with the problem that they just can’t find the solution for. Online is the first place new generations are going, to find reliable professional help. Unfortunately, not every online service is trustworthy and responsible. Same as for any other business, the smart thing would be to check edubirdie reviews, users’ ratings, and other useful sources to learn about the level of service quality and customer satisfaction. EduBirdie exists since 2015 so there is plenty of positive feedback that positions them as experts in providing this type of service. For any student that seeks assistance with code writing assignments maintaining communication with customer service and code writer in person are among the most praised qualities. In terms of educational values, EduBirdie can provide reliable sources of knowledge and experience. Simultaneously, its code writers play the mentoring role by offering examples and possible solutions to the assignment issues.

Review of EduBirdie code writing service

Let’s start with the ratings on the review websites. The scores always maintain between 4.6 and 5 stars and place it among the three most popular services. The rating is based on several thousand users’ reviews.

Probably the most painful fact, EduBirdie is not the cheapest option on the market. Also, unlike most writing services it has a bidding pricing system that can be confusing, especially for first-time users. However, this also means that this service is capable of hiring experts and high-profile professional code writers.

EduBirdie claims that all the work is unique and original, and offers revision as an option. Furthermore, a student can pick the same code writer for different assignments and extend the learning journey under the same guidance. Another positive thing is the opportunity for students to release their deposit once the quality of the work meets the requirements.

While browsing through the reviews we couldn’t find any complaint about confidentiality or delivery schedule. The only objection that was repeated in the older reviews is the lack of discounts. Judging by the latest first order promotional code, EduBirdie reacted to these comments and is actively changing the discount policy.

A significant number of positive reviews are addressed to customer service. It seems that EduBirdie is seriously determined to be online available 24/7, highly responsive to calls, and supportive in resolving potential issues.


The number of customers seeking assistance speaks loud enough about their legitimacy and professionalism. Since the quality of the work depends on the skills of the particular code writer, the system might resemble a lottery. Due to only a few negative reviews, it’s safe to assume that EduBirdie chooses its code writers with great care.