单项选择题
A.The set variable contains all six elements from the coll collection， and the order is guaranteed to be preserved.
B.The set variable contains only three elements from the coll collection， and the order is guaranteed to be preserved.
C.The set variable contains all six elements from the coll collection， but the order is NOT guaranteed to be preserved.
D.The set variable contains only three elements from the coll collection， but the order is NOT guaranteed to be preserved.
单项选择题 Which code， inserted at line 4， guarantees that this program will output [1， 2]？（）
单项选择题 A programmer must create a generic class MinMax and the type parameter of MinMax must implement Comparable. Which implementation of MinMax will compile？（）
单项选择题 A programmer iterates over the TreeSet and prints the name of each Drink object. What is the result？（）
