// Warning! This class doesn't really belong in its own file.
// We plan to make it an inner class!
public class StringNode {
    private StringNode next;
    private String data;
    
    public StringNode( String d, StringNode n ) {
        this.data = d;
        this.next = n;
    }
    
    public static void main( String[] args ) {
        StringNode head;
        head = new StringNode( "ha", null );
        head = new StringNode( "ho", head );
        StringNode ptr;
        int num = 0;
        // traverse the list
        for (ptr = head; ptr != null; ptr = ptr.next) {
            num++;
        }
        System.out.println( num );
    }
}