public class Person {  private String name, comment;  private int age;  public Person(String n, int a, String c) {   name = n; age = a; comment = c;  }  public boolean equals(Object o) {   if (! (o instanceof Person)) return false;   Person p = (Person)o;   return age == p.age && name.equals(p.name);  }}
return super.hashCode();
return name.hashCode() + age * 7;
return name.hashCode() + comment.hashCode() / 2;
return name.hashCode() + comment.hashCode() / 2 - age * 3;