Java Basics
The foundation Java code is built on
This section brings together the basic language constructs that gradually form complete programs. First, you will see what simple Java code looks like and how it is run, then you will learn to store data, work with it, and control which actions the program performs next.
After that, we will move on to ways of organizing code and working not only with individual values, but also with collections of data and text. You will need these topics in almost every later section of the course, so the goal here is to build a solid overall foundation.
What this section includes
- Your First Program. We will look at the main parts of a simple Java program and how to run your first code. This will give you a starting point for all the examples that follow.
- Variables and Types. We will see how a program stores values and why it matters to understand what kind of data we are working with.
- Operators. You will learn how to perform actions on values: calculate, compare, and produce new results.
- Conditions. We will learn how to describe situations where a program needs to choose one of several possible execution paths.
- Loops. We will see how to repeat actions without copying the same code again and again.
- Methods. We will explore how to split a program into clear parts and reuse actions that have already been written.
- Arrays. We will move from individual values to working with groups of data and learn how to access their elements.
- Strings. We will finish the section by working with text, one of the most common kinds of data in everyday programs.
How the topics fit together
These topics are not arranged as a random list. Variables give a program data, operators let you work with it, and conditions and loops control the flow of execution. Methods help organize growing code, after which arrays and strings provide the first convenient tools for working with more meaningful data.
By the end of the section, the individual constructs will stop feeling isolated: you will start to see how small elements come together to form a complete program.