What commands are needed to compile a java program?

#You need to use the javac command to compile a java program.

Let’s talk about how to use this command in detail.

For example, there is a java program Hello.java

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

We put the program in the test directory.

(Video tutorial recommendation: java video tutorial)

We open the command prompt and enter the directory where the java program is located

Then use the javac Hello.java command to compile

At this time we can see in the directory Go to the bytecode file Hello.class

Finally we run this bytecode again and enter the following command:

java Hello

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