public PersonNode(String name, int age)
{
p = new person(name, age);
next = null;
prev = null;
}
public PersonNode(person p)
{
this.p = p;
next = null;
prev = null;
}
public PersonLinkedList(person p)
{
first = new PersonNode(p);
}
public PersonNode()
{
p = new person(null, 0);
prev = null;
next = null;
}
public person(person pre, person next, int val)
{
Prev = pre;
Next = next;
Val = val;
}