Visual Studio Code – How do I edit the command to compile and run java file in vscode terminal?

Whenever I run a java program, both class name and filename have to be same, because the command to compile and run java in vscode terminal is:

cd "c:UsersuserDesktopJava" ; if ($?) { javac MyProgram.java } ; if ($?) { java MyProgram }

and when my class name is different from filename I have to edit the command to ...; if ($?) { java ActualClassname } in terminal every time I run the code.

So how do I change this command for running and compiling java program in vscode?

I just have to change it a little bit from:

cd "c:UsersuserDesktopJava" ; if ($?) { javac MyProgram.java } ; if ($?) { java MyProgram }

to:

cd "c:UsersuserDesktopJava" ; if ($?) { javac MyProgram.java } ; if ($?) { java MyProgram.java }

Adding .java in the end seems to solve my problem whenever I have different class name from filename.

Reason for asking this is some names for class were giving me errors
for example:

//reverse-string.java
import java.util.Scanner;
public class reverse-string //error:"invalid modifiers"
{
    public static void main(String[] args) {
        String str, rev="";
        char ch;
        Scanner in=new Scanner(System.in);
        System.out.println("Enter a String:");
        str = in.next();
        System.out.println("String = "+str);
        for (int i = 0; i < str.length(); i++) {
            ch = str.charAt(i);
            rev = ch + rev;
        }
        System.out.println("Reverse String = "+rev);
        in.close();
    }
}

So I used different names for class and file that’s why had to remove public from class:

//reverse-string.java
import java.util.Scanner;
class ReverseString
{
    public static void main(String[] args) {
        String str, rev="";
        char ch;
        Scanner in=new Scanner(System.in);
        System.out.println("Enter a String:");
        str = in.next();
        System.out.println("String = "+str);
        for (int i = 0; i < str.length(); i++) {
            ch = str.charAt(i);
            rev = ch + rev;
        }
        System.out.println("Reverse String = "+rev);
        in.close();
    }
}

and that worked both in vscode and command line using javac reverse-string.java and java ReverseString

After searching in the internet (chatgpt) I found out that changing the task.json in .vscode directory would change the command that is required to run the program. But I don’t know how do I change and even how do I open this task.json only for Java? It is very confusing.