去掉集合中重複的元素

 

import java.util.ArrayList;
import java.util.Iterator;

/**
 * 去掉集合中重複元素
 * 
 * @author ilosingn
 * 
 */
public class ArrayListTest
{
	public static void main(String[] args)
	{
		ArrayList al=new ArrayList();
		al.add("Java1");
		al.add("Java2");
		al.add("Java4");
		al.add("Java4");
		System.out.println(SingleElements(al));
		
	}

	public static ArrayList SingleElements(ArrayList al)
	{
		ArrayList Newal = new ArrayList();
		Iterator it = al.iterator();
		while (it.hasNext())
		{
			Object obj = it.next();
			if (!Newal.contains(obj))
			{
				Newal.add(obj);
			}
		}
		return Newal;
	}
}