Mine

/**
 * Write a description of class IntSLList here.
 * 
 * @author (your name) 
 * @version (a version number or a date)
 */
public class IntSLList {
    private IntNode head, tail;
    public IntSLList(){
        head = tail = null;
    }
    
    public void addToTail(int number) {
        if ( head == null)  {
            head = tail = new IntNode(number);

        }
        else {
            tail.next = new IntNode(number);
            tail = tail.next;  
        }
    }
    
    public void addToHead(int number) {
        head = new IntNode(number,head);
        if (tail == null)
            tail = head;
	}
    
    public int length()
    {
        int length = 1;
        if( head == null )
        {
            return 0;
        }
        IntNode temp;
        for( temp = head.next; temp != null; temp = temp.next )
        {
            length += 1;
        }
        return length;
    }
    
    public void addNode( int number , int place )
    {
        if( length() < place )
        {
            addToTail( number );
        }
        else
        {
            IntNode temp = head;
            for( int i = 1; i < place; i++)
            {
                temp = temp.next;
             }
            temp = new IntNode(number,temp);
        }
    }
    
    public void print()
    {
        IntNode temp = head;
        for( int i = 0; i < length(); i++ )
       {
           System.out.print(temp.info + ", ");
           temp = temp.next;
        }
    }
            
}

///////////////////////////////////////////////////////////////////////

public class IntNode  { 
public int info;
public IntNode next;
public IntNode (int i) { // constructor 1     
this(i,null);
}
public IntNode (int i, IntNode n) { // constructor 2
info = i;
next = n;
	}
}

///////////////////////////////////////////////////////////////////////