单项选择题
What inserted at line 39, will sort the keys in the props HashMap?()
A.Arrays.sort(s); B.s = new TreeSet(s); C.Collections.sort(s); D.s = new SortedSet(s);
What is the result?() A.2,1,0B.2,1,1C.3,2,1D.3,2,2E.Com...
What is the result?()
A.2,1,0 B.2,1,1 C.3,2,1 D.3,2,2 E.Compilation fails. F.An exception is thrown at runtime.
Given that the elements of a PriorityQueue are ordered ...
Given that the elements of a PriorityQueue are ordered according to natural ordering, and: What is the result?()
A.apple pear B.banana pear C.apple apple D.apple banana E.banana banana
Which three code fragments, inserted independently at l...
多项选择题
Which three code fragments, inserted independently at line 6, will compile?()
A.list.add("foo"); B.Object o = list; C.String s = list.get(0); D.list = new ArrayList<String>(); E.list = new ArrayList<Object>();