henterji's blog

版权声明：转载时请以超链接形式标明文章原始出处和作者信息及本声明
http://henterji.blogbus.com/logs/2951575.html

the best way to remove duplicates from a List in Java. This isn’t too tough to code up yourself (and there are a lot of examples on the net), but Java’s Collection classes actually make this a pretty easy task. Just add all the items in the list to a LinkedHashSet. Because it’s a set, duplicates won’t be added to the collection. Because it’s backed by a linked list, item order will be preserved. And because it uses a hashmap, checking to see if an item is already in the list should be pretty quick (near constant time).

Here’s the code: