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Learn Java

If you are an experienced coder or are a novice straight out of high school, Career Karma has everything you need to learn Java. Not only are there excellent guides to books, resources, courses, and events, but there are plenty of articles with quizzes, exercises, and projects to help you practice Java. Furthermore, there are articles and guides to advanced Java practices.

Learn Java: Best Courses, Books, and Resources for Learning Java
Java is one of the most widely known programming languages in the world. If you learn how to code in Java, you will have access to a wide range of opportunities. Professionals who know how to learn Java and apply…
Best Java Events to Learn and Get Support
Would you like to attend the best Java conferences or meetups happening soon? The best Java events are exciting opportunities for you to explore ideas, network with peers, and observe where the industry is going. They are engaging opportunities for…
Glossary of Java Terminology: A Beginner’s Guide
Every developer should have a strong understanding of Java terminology if they want to excel in their field. Java currently runs on over three billion mobile devices, making it one of the most popular programming languages in the world. As…
The Best Exercises and Quizzes to Help You Learn Java
Java is one of the most popular programming languages and one of the best you can start with when entering the world of programming. It is the foundation for many network applications and software including mobile apps, games, and enterprise…
Is Java Worth Learning? 5 Reasons to Learn Java
Despite being around for over 25 years, Java is still one of the most popular computer languages today. However, with computer language choices increasing every year, is Java worth learning in 2022?  Learning a coding language is challenging, so it…
Java Online Compiler Guide: How to Choose the Best Compiler to Run Java Online
Coding can be a lengthy and tricky process, making it easy to overlook compilation errors that can impact the quality of the outcome. This is why development tools have been introduced to help alleviate the stress of the process and…
Java IDE: What Are the Best IDE for Java Beginners?
Java is a general-purpose, high-level, object oriented programming language with few implementation dependencies. It was created in the 1990s by James Gosling and is primarily used for creating internet-based applications. It can also be used as a server-side language for…
How Hard Is It to Learn Java?
Java was first introduced in 1995 when James Gosling and his team decided to create a general-purpose language for televisions. However, it was soon discovered that Java functionality extended beyond programming cable televisions to developing applications for web and smart…
Java Best Practices, Guidelines, and Resources for Your Web Development Career
Java is a popular programming language used to build applications. Developers prefer it because it offers flexibility and allows them to write code that can work on any machine, regardless of the platform or architecture. It was built to be…
Java Apprenticeships: Programs, Jobs, and Salary
In 2021, you can make money while learning to code by joining an apprenticeship program. These formal training programs are excellent at helping professionals break into tech regardless of their level of education and experience.  This guide features top Java…
Print Java ArrayList: A Complete Guide
ArrayLists have been a trending topic in Java. They provide you with many more benefits than standard arrays. ArrayLists allow you to efficiently store objects in a row and clear them off when not needed. They also help you to…
Java: Could Not Find Or Load Main Class
When working with Java, the final execution of code happens via pre-compiled classes. Once you write a class in Java, the compiler converts your high-level source code into a low-level scheme called bytecode. For each class that you write, an…
How to Solve java.lang.NullPointerException Error
You must have come across something called a NullPointerException if you have worked on Java-based applications. The Null Pointer Exception is one of the most common errors in Java application development. This exception is usually the result of a human…
Kotlin: Courses, Trainings, and Other Resources
Have you ever wondered how Android applications work? How are the apps that help you in your day-to-day activities created? There certainly is a whole ecosystem of frameworks and languages to help create these apps, but which one is recommended…
How to Learn Scala
Are you interested in data science and scalability? Do you want to learn an in-demand programming language that you’ll be paid well to use? And finally, are you familiar with Java or willing to learn a language that is very…
Java indexOf(): A How-To Guide
The Java indexOf() method finds the index position at which a specified string begins. This method lets you find a string within another string. If the value you specify is not present in the string through which you are searching,…
Java Selection Sort: A How-To Guide
The Java selection sort finds the smallest item in a list and moves that value to the start of the list. This happens repeatedly until every element in the first list has been sorted. The selection sort returns the sorted…
Java break Statement: A How-To Guide
A Java break statement halts the execution of a loop. When a break statement is run, a program starts to run the code after a statement. If a break statement is used in a nested loop, only the innermost loop…
Java Ternary Operator: A Step-By-Step Guide
The Java ternary operator lets you write an if statement on one line of code. A ternary operator can either evaluate to true or false. It returns a specified value depending on whether the statement evaluates to true or false.…
Java Regex: An Introduction
There may come a time in your application development journey where you need to find patterns in strings. Some methods can take time to execute, while others save you time. One time-saving technique called regex — regular expressions — can…
Learn to Sort ArrayList in Java
The Collections.sort() method sorts a Java ArrayList in ascending order. Collections.reverse() reverses the order of a Java ArrayList. You need to import the Java Collections package to use these methods. How to Sort an ArrayList in Java You may encounter…
How to Use the Java continue Statement
The Java continue statement stops one iteration in a loop and continues to the next iteration. This statement lets you skip particular iterations without stopping a loop entirely. Continue statements work in for and while loops. Java for and while…
How to Convert a Java String to Char Array
The toCharArray() method converts a string to a char array in Java. This method lets you manipulate individual characters in a string as list items. Spaces, numbers, letters, and other characters are all added to the char array. When coding,…
Java User Input and Scanner Class: A Step-By-Step Guide
The Scanner class is used to read Java user input. Java Scanner is built into the java.util package, so no external libraries are needed to use it. Scanner reads text from standard input. This text is returned to the main…
A Step-By-Step Guide to charAt in Java
The Java charAt() method returns a character at a specific index position in a string. The first character in a string has the index position 0. charAt() returns a single character. It does not return a range of characters. When…
How to Use Java Math.random
The Math.random()Java method generates a pseudorandom number between 0.0 and 1.0. The resulting random number can be multiplied to get a range outside 0-1, and the result can be 0 but is always less than 1.  When you’re programming, there are…
Java Substring: A How-To Guide
The Java substring() method returns a portion of a particular string. This method accepts the start and end index values of the characters you would like to retrieve from a string. The original string on which substring() is applied is…
How to Use Enum in Java
A Java enum is a data type that stores a list of constants. You can create an enum object using the enum keyword. Enum constants appear as a comma-separated list within a pair of curly brackets. An enum, which is…
Java Stack Class
A Java stack is a last-in, first-out data structure. The first item removed from a stack is the item last added to the stack. A stack data structure adds new items to the end of the stack. Java stacks extend…
Java Web Development: A Guide to Creating Websites with Java
If you have an interest in web development, you’ll come across the first hurdle many people in this field face: choosing exactly how to develop your websites. There are several programming languages, frameworks, and programs for web developers to utilize.…

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