Error - at least one public class is required in main file

Question

Problem:

Hello Kodlogs,

I am a novice Java programmer. I just wrote my very first program a few minutes earlier. Now I want to write a program that can add two different integer numbers for me.
I guess I done my coding well but it says something wrong with my writing and throws back an error: “at least one public class is required in the main file”

Please find my code snippet below to understand my problem well.

Thanks all.

class AddingNumbers{
     public static void main(String []args){
         int x = 10;
         int y = 15;
         int sum = x+y;
        System.out.println("Sum is: " + sum);
     }
}

 

Answer 1

Hello Gavin, I hope you are enjoying programming with problem-solving. The problem occurred in the very first line of your program.

In java, you need to have at least one public class in your program otherwise it not gonna run. You may have multiple public classes but mandatory is t least one. I hope you get my point. Let’s write the program again with a public class,

public class AddingNumbers{
     public static void main(String []args){
         int x = 10;
         int y = 15;
         int sum = x+y;
        System.out.println("Sum is: " + sum);
     }
}

Now your program looks good and you are all set to go. This program should compile error-free and give an output:

Sum is: 25