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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.

Java Hello World: A Guide for Beginners
Welcome to the Java programming language. The first task any beginner should take on is the “Hello, World!” script. In this task, you have to print a message to the console. This is another way of saying make a line…
Java Compilers: A Step-By-Step Guide
Five to ten years ago, learning Java wasn’t as accessible as it is now. Back then, you had to download a Java Development Kit (JDK) that contained the compiler and interpreter to run on your machine. Now there are a…
Is Java Game Development Worthwhile?
The field of video game design is exploding. As more and more games are being made and gaining traction, the need for more game designers and developers is only increasing. It’s also a profitable business, with the median annual wage…
Java Quicksort: A Beginner’s Guide
It can be difficult to wrap your head around the quicksort sorting algorithm. It’s not as intuitive as other sorts like an insertion sort or a bubble sort. Quicksorts are an efficient way of sorting smaller lists. In this guide,…
Fibonacci Java: A Guide
A Guide to the Fibonacci Java Algorithm The Fibonacci Sequence is a sequence where the next number is calculated by calculating the sum of the previous two numbers. This sequence has its claim to fame in mathematics. It also appears…
Top Java Projects to Sharpen Your Skills and Build Your Java Portfolio
Java is one of the most popular programming language in the world and is used by several top tech companies. So, why not master Java skills and become a sought-after candidate in the backend development job market?  This article will…
Java String replace() Method: A Step-By-Step Guide
The Java string replace() method will replace a character or substring with another character or string. The syntax for the replace() method is string_name.replace(old_string, new_string) with old_string being the substring you’d like to replace and new_string being the substring that…
How to Convert a Char to String in Java
To convert a char to a string in Java, the toString() and valueOf() methods are used. The toString() and valueOf() methods are both used to convert any data type to a string. For converting a char to a string, they…
Java String Contains: A Step-By-Step Guide
The Java contains() method checks if a string contains another substring. The contains() method returns either True or False. Java contains() accepts one parameter: the substring to search for in your string. Often, when you’re working with strings, you’ll want…
Java Initialize Array: A Step-By-Step Guide
To initialize an array in Java, assign data in an array format to the new or empty array. Initializing an array in Java involves assigning values to a new array. Java arrays can be initialized during or after declaration. In…
Java Compare Strings: A Step-By-Step Guide
There are three ways to compare strings in Java. The Java equals() method compares two string objects, the equality operator == compares two strings, and the compareTo() method returns the number difference between two strings. String comparison is a crucial…
Lambda Expressions in Java: A Guide
How to Use Lambda Expressions in Java Have you ever thought that some methods could fit on one line, if only it weren’t for the verbose Java syntax that you’ve got to use to declare a method? You’re not the…
Java Random Number: A Beginner’s Guide
How to Generate a Java Random Number 5. 7. 22. For us humans, it’s easy to generate a random number. All we have to do is ask ourselves for a number, and one pops into our mind. If only it…
Java Bubble Sort: A Guide
How to Write a Java Bubble Sort When programmers talk about bubble sorts, they are not talking about the water bubbles that you’ve probably blown at some point in your life. They are talking about a sorting algorithm that is…
Java Boolean: A Beginner’s Guide
How to Use Booleans in Java True or false. We’re not talking about a question on a standardized test. True and false are the values that can be stored inside the Boolean data type. In programming, Booleans are used to…
Binary Search Java: A Guide
How to Write a Binary Search Algorithm in Java Computers do not search through items like humans do. Whereas humans can change their approach to finding something, computers need to be given specific instructions on how to locate a particular…
Java Variables: A Guide for Beginners
How to Use Java Variables What is a variable, you ask? It's an essential concept of programming, and without it developing applications would be significantly more difficult. A variable is a way to label values that you’re using in your…
How to Use Java Classes and Objects
What do we mean when we talk about a class in Java? It’s certainly not a class like you’d have in school, with students and teachers. A class is a blueprint for an object in your code. Java is an…
Java Array: A Guide for Beginners
What if there was a way that you could declare one variable that stores multiple values? There is? That's great. In Java, there's a concept called an array that allows you to do exactly this. You can store multiple values…
if…else Java: A Beginner’s Guide
When you think about it, there’s a lot of “ifs” in our lives. If the grocery store is open, we can go in and buy groceries; otherwise, we cannot. If it’s 12 noon, then it is time to take a…
Java String: A Guide for Beginners
When you think of string, you may see a cat playing around with a ball of yarn. It’s true that a ball or yarn is string, but when programmers use the word string they mean something different. In programming, a…
ArrayList Java: A Beginner’s Guide
Are you tired of having to declare the size of an array before you can use it? You’re not the only one, as it’s not always convenient to have to define how many values an array should store before you…
How to Initialize ArrayList in Java
The Java Arrays.asList() method and ArrayList class are used to initialize arrays in Java. The normal List interface cannot be used to create arrays, so the ArrayList class is required to create an empty array. The Java Arrays.asList() method allows…
6 Reasons Why You Should Learn Java
“What is the best programming language to learn?” is a common question asked by beginners who are thinking about learning to code. It’s a good question, too. Learning how to code is intense and a big challenge, so you’ll want…
Essential Java Frameworks for 2020
In our current business environment, software engineers are a hot commodity, and the folks who know Java are in particularly high demand. If you work in Java, using a framework helps you in your tasks and makes your work reliable…
What Is Java Used For? Top Java Tasks
If you’ve spent any time investigating web design bootcamps or looked into self-study to get yourself ready to jump to a programming career, you’ve probably heard about Java. Java is one of the most popular coding languages around and provides…
The Absolute Best Java IDEs for Programming
Java is one of the most popular programming languages around. It’s no coincidence that there are tons of Java bootcamps—it’s a flexible and powerful code that you can use for all sorts of tasks. Working with an integrated development environment…
Top Java 8 Interview Questions You’re Likely to Hear
In today’s job market, people who have web development skills command fantastic salaries and get to work on fascinating issues. One of the key languages to learn during your studies is Java 8, which sees usage in all kinds of…
Java Static
How to Use the Java Static Keyword When you’re working with classes in Java, you usually need to create an instance of the class before you can access its members. However, you may encounter a situation where you want to…
Java Array Contains
When you’re working with arrays in Java, you may encounter a situation where you want to check whether an array contains a particular value. For instance, if you are building a program that tracks your bird-watching progress this season, you…

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