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.
Next, I'm going to explain how Java code gets executed under the hood.
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.
Next, I'm going to explain how Java code gets executed under the hood.
