item.java

source codes to solve Hexpuzzle problem

import java.util.ArrayList;

public class Item {
	private char data;
	private int position;
	private ArrayList<Item> adjacentItems;
	
	Item(char data, int pos)
	{
		this.data = data;
		this.position = pos;
		adjacentItems = new ArrayList<Item>(); 
	}
	
	Item(Item item)
	{
		if(item != null)
		{
			this.data = item.data;
			this.position = item.position;
			ArrayList<Item> itemList = item.getAdjacentItems();
			
			if(itemList != null && itemList.size() > 0)
			{
				this.adjacentItems = new ArrayList<Item>();
				 
				for(int i = 0; i < itemList.size(); i++)
				{
					Item tmp = itemList.get(i);
					this.adjacentItems.add(tmp);
				}
			}
		}
	}
	
	public char getData()
	{
		return this.data;
	}
	
	public int getPosition()
	{
		return this.position;
	}
	
	public ArrayList<Item> getAdjacentItems()
	{
		return this.adjacentItems;
	}
	
	public void connectItem(Item item)
	{	
		if(item != null)
			this.adjacentItems.add(item);
	}
	
	public void swapItem(Item item)
	{
		if(item != null)
		{			
			char tempData = this.data;
			this.data = item.data;
			item.data = tempData;
		}
	}
	
	public boolean equals(Object obj)
	{
		Item temp = (Item)obj;
		if(this.getData() == temp.getData() && 
				this.getPosition() == temp.getPosition())
			return true;
		else
			return false;
	}
}