How to run java program

How to run java program

1. First we need a java program, a simple Hello Java as an example:

public class HelloJava{
    public static void main(String[] args){
        System.out.println("Hello Java");
    }
}

After saving the above code as a .txt document, change the suffix name to .java (recommended study: java course)

Get the file as shown in the figure: it doesn’t matter if the icons are different, the suffixes are the same.

#2. Next, we hold down the shift right key in the directory of the file at the same level and open the command line

3. We use the javac command to generate a .class file that can be executed on the command line, as shown in the figure:

(Ps: Pay attention to the suffix when entering Bring your name with you)

After execution, the display is as follows:

You can see that a .class file with the same name has been generated on our desktop:

#4. So how do we execute it? Use the java command:

#You can see the output "Hello Java" required in our code.

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