网友您好, 请在下方输入框内输入要搜索的题目:
1.importjava.util.*;2.publicclassTestSet{3.enumExample{ONE,TWO,THREE}4.publicstaticvoidmain(String[]args){5.Collectioncoll=newArrayList();6.coll.add(Example.THREE);7.coll.add(Example.THREE);8.coll.add(Example.THREE);9.coll.add(Example.TWO);10.coll.add(Example.TWO);11.coll.add(Example.ONE);12.Setset=newHashSet(coll);13.}14.}Whichstatementistrueaboutthesetvariableonline12?()
A.Thesetvariablecontainsallsixelementsfromthecollcollection,andtheorderisguaranteedtobepreserved.
B.Thesetvariablecontainsonlythreeelementsfromthecollcollection,andtheorderisguaranteedtobepreserved.
C.Thesetvariablecontainsallsixelementsfromthecoilcollection,buttheorderisNOTguaranteedtobepreserved.
D.Thesetvariablecontainsonlythreeelementsfromthecoilcollection,buttheorderisNOTguaranteedtobepreserved.
参考答案