LinkList

 

public class LinkList {
	private Node firstNode; //head
	private Node currentLastNode;//tail
	private int size = 0;

	/*public void add(Object o) {
		if (firstNode == null) {
			Node n = new Node();
			n.setData(o);
			firstNode = n;
			currentLastNode = n;
			size++;
		} else {
			Node n = new Node();
			n.setData(o);
			currentLastNode.setNext(n);
			currentLastNode = n;
			size++;

		}
	}*/
	
	public void add(Object o) {
		Node n = new Node();
		if (firstNode == null) {
			n.setData(o);
			firstNode = n;
			currentLastNode = n;
			
		} else {
			n.setData(o);
			currentLastNode.setNext(n);
			currentLastNode = n;
		}
		size++;
	}

	public int size() {
		return size;
	}
	
	public String toString() {
		Node n = firstNode;
		String s = "";
		while(n != null){
			s = s + n.getData() + " ";
			n = n.getNext();
		}
		
		return s;
	}
	

}

import static org.junit.Assert.*;

import mypack4.LinkList;

import org.junit.Test;

public class LinkListTest {

	@Test
	public void test() {
		LinkList l = new LinkList();
		for (int i = 0; i < 15; i++) {
			l.add(i);
		}
		System.out.println(l);
		System.out.println(l.size());
	}

}