public class HashSetEntry<T> {
    public T data;                  // data stored at this node
    public HashSetEntry<T> next;    // reference to the next entry
    
    // Constructs a single hash entry.
    public HashSetEntry(T data) {
        this(data, null);
    }

    // Constructs a single hash entry, with reference to the next hash entry.
    public HashSetEntry(T data, HashSetEntry<T> next) {
        this.data = data;
        this.next = next;
    }    
}