java ɾ³ýList ÖеÄÖظ´Êý¾Ý

1. Ñ­»·listÖеÄËùÓÐÔªËØÈ»ºóɾ³ýÖظ´
public static List removeDuplicate(List list) {
for ( int i = 0 ; i < list.size() - 1 ; i ++ ) {
for ( int j = list.size() - 1 ; j > i; j -- ) {
if (list.get(j).equals(list.get(i))) {
list.remove(j);
}
}
}
return list;
}
2. ͨ¹ýHashSetÌß³ýÖظ´ÔªËØ
public static List removeDuplicate(List list) {
HashSet h = new HashSet(list);
list.clear();
list.addAll(h);
return list;
}
ÔÚgroovyÖе±È»Ò²¿ÉÒÔʹÓÃÉÏÃæµÄÁ½ÖÖ·½·¨, µ«groovy×Ô¼ºÌṩÁËunique·½·¨À´È¥³ýÖظ´Êý¾Ý
def list = [1, 2, 3, 2, 4, 1, 5]
list.unique() // [1, 2, 3, 4, 5]