错误：在 class Main 中找不到 Main 方法，请定义 main 方法

Question

I need help with the main method, I'm getting this error: while compiling the Project:

Error: Main method not found in class Main, please define the main method as:                                                 
   public static void main(String[] args)                                                                                     
or a JavaFX application class must extend javafx.application.Application

Also tried online Java compilers but no luck.

public class Main{
        
        String yourname = "Ayush Sahu";
        int mnumber = 25;
        
        public void justtest(){
            
            System.out.println("This is a test Method!!!");
        }
        
        
    }
    
    class testing extends Main{
        
        String fname = "Balamukunda";
        String lname = "Sahu";
        int age = 25;
        
        public void testing(){
            
            System.out.println("This is a test Method!!!");
        }
        
        public static void main(String[] args){
            
            //Accessing the Data of Class: Main
            
            testing myObj1 = new testing();
            
            System.out.println(myObj1.yourname);
            System.out.println(myObj1.mnumber);
            myObj1.justtest();
            
            
            //Accessing the Data of Class: testing
            
            myObj1.testing();
            
            System.out.println(myObj1.fname);
            System.out.println(myObj1.lname);
            System.out.println(myObj1.age);
            
            
        }
    }

Answer 1

If you want to run in IDE, right click in middle of testing class and find Run -> Run Application it the dropdown menu and click it. Try to separate each class in individual files. So you must have at least two files: Main.java and testing.java . I strongly recommend you to use Camel Case for class names and respect coding standard (which mean change testing to Testing or even better to Test ).

If not, You must change it in Manifest file or find run configuration in your IDE.