package aReflection; public class Person { @NotNull public String name; @NotNull @Range protected int age; public Person(){ this.name = "unnamed"; this.age = -1; } public Person(String name){ this.name = name; this.age = -1; } public Person(String name, int age){ this.name = name; this.age = age; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public String hello(){ return "hello, I am " + name; } }