public class StaticProperty {
    public static class Person {

        static int staticProperty = 10;
        String name;

        public Person(String name) {
            this.name = name;
        }

    }

    public static void main(String[] args) {
        Person john = new Person("john");
        System.out.println(john.staticProperty); // 10
        john.staticProperty = 5;
        System.out.println(Person.staticProperty); // 5
    }

}