Java is a mature and well-designed programming language with a wide range of uses. One of its unique benefits is that it is cross-platform: once you create a Java program, you can run it on many operating systems, including servers (Linux/Unix), desktop (Windows, macOS, Linux), and mobile operating systems (Android, iOS).
In this tutorial, you’ll create a simple “Hello, World!” program in Java. The “Hello, World!” program is a simple and complete first program for beginners, and it’s a good way to make sure your environment is properly configured. By creating a “Hello, World” program, you’ll start learning Java’s basic syntax as well as the compilation and execution process of a Java program. Once you’re finished, you’ll be able to write and run basic Java code.
Java is a statically typed programming language. This means that when you create a variable, you must also specify its data type, which is the type of information it stores. Java has two data types: primitive and reference (also known as non-primitive). In this tutorial, you will use variables to store and use information in a Java program to learn about some of the commonly used data types in Java.
An operator is one or more symbols in combination — from the well-known arithmetic operators such as minus and plus to the more advanced
instanceof. When you apply operators on values or variables, you get a result from the operation. In this tutorial, you will use unary, binary, and ternary operators in a range of scenarios.
Conditionals statements change the program flow. Conditional statements are also called branching statements because when a condition is matched, the flow goes one way into one branch of the code. If a condition is not met, another condition is evaluated, if there is one, and so on. In this tutorial, you will write conditional statements in Java and learn about each type’s use cases, benefits, and drawbacks.
Writing repetitive tasks is common in programming. Loops are structures for controlling repetitive program flow. Depending on their syntax and logic, there are two main types of loops:
for loops. In this tutorial, you will use both types to create repetitive tasks and learn about the benefits and drawbacks of each one.
Learn how to work with arrays in Java. In this tutorial, you’ll use a char array to store a password securely while learning the intricacies of arrays in Java.