In the previous chapter, we created a Java file called Main.java, and we used the following code to print “Hello World” to the screen:
Main.java
public class Main {
public static void main(String[] args) {
System.out.println("Hello World");
}
}
Some PCs might have Java already installed.
To check if you have Java installed on a Windows PC, search in the start bar for Java or type the following in Command Prompt (cmd.exe):
C:\Users\Your Name>java -version
If Java is installed, you will see something like this (depending on version):
java version "22.0.0" 2024-08-21 LTS Java(TM) SE Runtime Environment 22.9 (build 22.0.0+13-LTS) Java HotSpot(TM) 64-Bit Server VM 22.9 (build 22.0.0+13-LTS, mixed mode)
If you do not have Java installed on your computer, you can download it for free at oracle.com. Continue reading Java Getting Started
Java is a popular programming language, created in 1995.
It is owned by Oracle, and more than 3 billion devices run Java.
It is used for: