单项选择题
Floats=newFloat(0.9F);Floatt=newFloat(0.9F);Doubleu=newDouble(0.9);下列哪个表达式的结果是true?()
A.s==t
B.s.equals(t)
C.s==u
D.t.equals(u)
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多项选择题
Which of the following will definitely stop a thread from executing?()
A.wait()
B.notify()
C.yield()
D.suspend()
E.sleep() -
多项选择题
The ThreadGroup class instance()
A.Allows threads to be manipulated as group
B.Provides support for ThreadDeath listeners
C.May contain other ThreadGroups
D.Must contain threads of the same type -
多项选择题
下面哪些是J2EE中的23种设计模式?()
A.Adapter
B.Observer
C.Bridge
D.Singleton
