1. import java.util.*; 2. public class Example { 3. public static void main(String[] args) { 4. // insert code here 5. set.add(new integer(2)); 6. set.add(new integer(l)); 7. System.out.println(set); 8. } 9. } 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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