Why the console gives me the message "You should need class or interface"

Question

Today I copy some Java codes from the webs,I paste them on the EmEditor
I run the program But the console give me the message "You should need class or interface" I think maybe i paste somes some errors on it So i type the program by myseif But aftering running it I get the same result "You should need class or interface"
here is my code:
public class foo
     static String s;
     public static void main(String[] args ){
          System.out.println("s="+s);
}

Answer 1

public class foo
     public static void main(String[] args )
String s="Hello";
          System.out.println("s="+s);
}run that, it will work.