摘要：
Listcards=Lists.newArrayList；ListcopyList=Lists.newArrayList（）；copyList=卡片；copyList.remove；System.out.println；System.out.println；使用等号的运算结果是卡片：[6,10,12,21,23,29,30,38,39,42,46,51,53,59,60]copyList:[6,10,1,22,23,29,30,38,49,43,46,51,53.59,60]List卡片=列表。newArrayList；ListcopyList=Lists.newArrayList（）；copyList.addAll；copyList.remove；System.out.println；System.out.println；add的结果卡片：[6,10,11,12,21,23,29,30,38,39,42,46,51,53,59,60]copyList:[6,10,12,23,29,30,38,42,42,43,46,51,53.59,60]当使用等号时，两个集合都将被操作，而add不会
List<Integer> cards = Lists.newArrayList(6,10,11,12,21,23,29,30,38,39,42,43,46,51,53,59,60);
List<Integer> copyList = Lists.newArrayList();
copyList = cards;
copyList.remove(2);
System.out.println("cards:"+cards);
System.out.println("copyList:"+copyList);
用了等号的操作结果是
cards:[6, 10, 12, 21, 23, 29, 30, 38, 39, 42, 43, 46, 51, 53, 59, 60]
copyList:[6, 10, 12, 21, 23, 29, 30, 38, 39, 42, 43, 46, 51, 53, 59, 60]
List<Integer> cards = Lists.newArrayList(6,10,11,12,21,23,29,30,38,39,42,43,46,51,53,59,60);
List<Integer> copyList = Lists.newArrayList();
copyList.addAll(cards);
copyList.remove(2);
System.out.println("cards:"+cards);
System.out.println("copyList:"+copyList);
用了add的结果
cards:[6, 10, 11, 12, 21, 23, 29, 30, 38, 39, 42, 43, 46, 51, 53, 59, 60]
copyList:[6, 10, 12, 21, 23, 29, 30, 38, 39, 42, 43, 46, 51, 53, 59, 60]
用等号操作时两个集合都会被操作，add不会