Write A Program Where User Inputs A Month Between 1-12

I have an assignment where I'm supposed to write a program where the user inputs a month between 1-12 and then the right amount number in every month. I've tweaked the code a bunch of times, but I keep getting this error message:

insert "}" to complete StatementKALENDER_3.java
insert "}" to complete BlockKALENDER_3.java

The code:

import java.util.*;
import java.util.Scanner;
public class KALENDER_3
}
public static void main(String[] args){
Scanner scanner = new Scanner (System.in);
System.out.print("Skriv ett manadsnummer: ");

[code].....

I think I have just forgot to put in a few { } symbols, maybe an open loop?