Which code, inserted at line 4, guarantees that this program will output [1, 2]?()
- A、Set set = new TreeSet();
- B、Set set = new HashSet();
- C、Set set = new SortedSet();
- D、List set = new SortedList();
- E、Set set = new LinkedHashSet();
正确答案:A
答案解析:有
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