preview 4/12 lecture sketch -- under construction

$public$ versus $private$ example:

    public class Fred {
        private static void eat() {
            String.out.println("fred eats");
        }

        public static void pigout() {
            eat(); eat(); eat(); eat(); eat(); eat();  // ok -- same class
        }

        public static void main(String[] args) {
            Temptation.main(null); // ok -- $Temptation.main$ is $public$
        }
    }

    public class Temptation {
        public static void main(String[] args) {
            Fred.pigout(); // ok -- $Fred.pigout$ is $public$
            Fred.eat(); // not ok -- private method called from different class
        }
    }

box scope picture:

    class Fred
    +---------------+
    | private eat   |
    | public pigout |
    | public main   |
    +---------------+
    
    class Temptation
    +---------------+
    | public main   |
    +---------------+