LinkedHashSet-有序&去重

 

List<String> list = new ArrayList<String>();
list.add("1");list.add("2");list.add("3");
list.add("4");list.add("4");

List<String> newList = 
		new ArrayList<String>(new LinkedHashSet<String>(list));
for(Iterator<String> iter = newList.iterator();iter.hasNext();){
	System.out.println(iter.next());
}

 输出：1,2,3,4