Java Tutorial for Beginners
Programming with Mosh
Mosh is a software engineer with over two decades of experience and
has taught over 3 million people how to code. He has designed this
course for anyone who wants to learn Java. If you're a beginner, don't
worry - Mosh promises to make Java super simple and hold your hand
through this course. He hopes you'll stick around and learn this
beautiful and powerful programming language.
The Anatomy of a Java Program
In this Java tutorial, we'll be looking at the basics of a Java program. The
smallest building block in Java programs are functions. If a function is a
block of code that performs a task, think of the buttons on the remote
control of your TV. Every Java program should have at least one function
and that function is called main.
Writing Java Code
After the parentheses, we have a pair of curly braces and inside these
braces, we write the actual Java code. Every Java program should have
at least one function and that function is called main. So, main is the
entry point to our programs. Whenever we execute a Java program, the
main function gets called and the code inside this function gets
executed.
Downloading IntelliJ IDEA
, IntelliJ IDEA is absolutely free and it's more than enough for this course,
so download it now.
Download IntelliJ IDEA
A class is a container for related methods, so we use classes to organize
our code. By the same token, we have a concept called package, and we
use a package to group related classes.
As our applications grow, we're going to end up with hundreds or even
thousands of classes, so we should properly organize these classes into
packages. The base package for a Java project is the domain name of
your company in reverse.
The code editor might look a little bit intimidating at first, but trust me
it's really easy and you're going to learn about it throughout this course.
For now, just type a base package for your project; it can be your name
or whatever, it doesn't really matter.
Marsh has put together a comprehensive cheat sheet with summary
notes that you can download below this video.
IntelliJ is building our application and we can see the result in this little
terminal window. So, here's our "Hello World" message. That was our
first Java program.
Programming with Mosh
Mosh is a software engineer with over two decades of experience and
has taught over 3 million people how to code. He has designed this
course for anyone who wants to learn Java. If you're a beginner, don't
worry - Mosh promises to make Java super simple and hold your hand
through this course. He hopes you'll stick around and learn this
beautiful and powerful programming language.
The Anatomy of a Java Program
In this Java tutorial, we'll be looking at the basics of a Java program. The
smallest building block in Java programs are functions. If a function is a
block of code that performs a task, think of the buttons on the remote
control of your TV. Every Java program should have at least one function
and that function is called main.
Writing Java Code
After the parentheses, we have a pair of curly braces and inside these
braces, we write the actual Java code. Every Java program should have
at least one function and that function is called main. So, main is the
entry point to our programs. Whenever we execute a Java program, the
main function gets called and the code inside this function gets
executed.
Downloading IntelliJ IDEA
, IntelliJ IDEA is absolutely free and it's more than enough for this course,
so download it now.
Download IntelliJ IDEA
A class is a container for related methods, so we use classes to organize
our code. By the same token, we have a concept called package, and we
use a package to group related classes.
As our applications grow, we're going to end up with hundreds or even
thousands of classes, so we should properly organize these classes into
packages. The base package for a Java project is the domain name of
your company in reverse.
The code editor might look a little bit intimidating at first, but trust me
it's really easy and you're going to learn about it throughout this course.
For now, just type a base package for your project; it can be your name
or whatever, it doesn't really matter.
Marsh has put together a comprehensive cheat sheet with summary
notes that you can download below this video.
IntelliJ is building our application and we can see the result in this little
terminal window. So, here's our "Hello World" message. That was our
first Java program.
