Course 1

Verifying

When you have JDK configured, you can execute command javac --version in your terminal, and you can see the version of the compiler like this below:

Meet JShell

Before we write code with a file, we prefer to use a REPL (Read-Evaluate-Print Loop) environment to easily run our code.

Open JShell with jshell, and you can see the information:

Now it's our time!

Printing

You can print something with System.out.println. This is a method that prints objects to the terminal.

To call a method, please add parentheses after the method name. Press Tab to auto-complete the context.

You can see an empty line printed after you called this method.