can enyone tell me what is mistake exactly

Question

import java.util.Scanner;
class Mycl {
private int size;
public void setSize(int x) {
size=x;
}
public int getSize() {
return size;
}
public static int weight(int x) {
switch(x) {
case 50 :
System.out.println("weak");
break;
case 70 :
System.out.println("perfect");
break;
case 90 :
System.out.println("fat");
break;
default :
System.out.println("very fat");
}
}

Answer 1

method weight has no return value, missing "}" at the end, no main method, attribute size is nowhere initialized.

Answer 2

how ?? I couldn't understand that
but I have main method
public class Program {
public static void main(String[] args) {
Mycl cl =new Mycl();
System.out.print("please enter your weights");
Scanner scan =new Scanner(System.in);
cl.setSize(scan.nextInt());
System.out.println("you are :"+ cl.getSize());
}
}
and initialized size to 0
but
still not working
and I get error missing returne statement