public int insert(Link l)
	{
		
		Link temp=head;
 
		if(head==null)
		{
			head=l;
		}
	
		while(temp.getNext()!=null)
		{
			if(temp.getNext()==null)
			{
				temp.setNext(l);
				l.setPrev(temp);
 
			}
			else
			{
				temp=temp.getNext();	
			}
		}
		return 0;
	}

getNext()

public Link getNext()
	{
		return next;
	}

i agree with Senthoorkumaran Punniamoorthy, and you can change the statements 

Link temp=head;

if(head==null)
{
	head=l;
}

//////////////////////////////////////////////				
//to
//////////////////////////////////////////////

if(head==null)
{
	head=l;
}
Link temp=head;


what do think of it ? or you can supply all your codes for our reference.