问题:
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();
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]? ()
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