Java Programming

Hi, hope anybody can help me with this problem I'm having.

I've created a java bean called Category which looks something list this

public class Category
{
  private int id;
  private String name;
  private Vector children; // a vector of Category objects

  public Category(){};

  public void setId(int id)
  {
    this.id = id;
  }

  public int getId()
  {
    return id;
  }

  // rest of get and set methods
}

I've store the data inside a database table like the below

category id                      name                          description                           parent id
1                                category 1                   This is a base folder                  -1
2                                category 2                   This is also a base folder           -1
3                                sub category 1             This is a sub folder                    2
4                                sub category 2             ...                                            2
5                                sub sub category          ....                                           4 

I need to load this data back out of the database into a category array (Category[] cat) so I loop through the array and display all category (and child categorys) on a page.

Will I need recursive methods to retreive the data and display it on the screen? I'm trying to write one but I keep getting into an infinite loop!!!!

Can anybody help me out?