Q73 Which of the following are valid double literals? f# Z" K0 B: h2 d4 T) h
A 1D
7 d, M) c7 M! V. j5 h; u% I B eE-5D7 k( |5 r! O6 c* y
C e2d! n' h: G* d' v+ a
D 1ed
9 [- P$ x% ], Q' v: i0 F0 b, r Q74 How can you force an object to be garbage collected?$ e: H: d! Q# r# S. g7 M
A Invoke its finalized() method
+ \8 J* q, p1 [! R( ~ B Remove all references to the object.
+ O/ \4 J$ S9 e: w# r$ N3 U" q C Use all memory that is available to the program." |% M3 c- S+ o
D You cannot force an object to be garbage collected.2 y# x0 r9 W! X% d
Q75 Which of the following are true?
8 d) ?/ C G/ x0 S7 o p7 ^ A TextComponent extends TextArea
$ R& v6 h$ V% m& c0 F B TextArea extend TextField
% e: P/ W5 b# w3 ^+ F$ U C TextField extends TextComponent
& a* N f, @ n. G2 l+ @1 } D TextComponent extends TextField7 X* M! I3 u6 ~7 A3 R
E TextArea extends TextComponent.
7 h# h- _3 v( e; o) |4 T Q073 AB; F2 T w- Y+ {+ ^$ w+ I5 V; W
Q074 D
7 \" A) `2 {. \ Q075 CE |
发表于 2012-8-4 12:33:16
