单项选择题
Which statements concerning the switch construct are true？（）
A.All switch statements must have a default label.
B.There must be exactly one label for each code segment in a switch statement.
C.The keyword continue can never occur within the body of a switch statement.
D.No case label may follow a default label within a single switch statement.
E.A character literal can be used as a value for a case label.
相关考题
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单项选择题
What will be the result of attempting to compile and run the following code？（） public class Q6b0c { public static void main（String args[]） { int i = 4； float f = 4.3； double d = 1.8； int c = 0； if （i == f） c++； if （（（int） （f + d）） == （（int） f + （int） d）） c += 2； System.out.println（c）； } }
A.The code will fail to compile.
B.0 will be written to the standard output.
C.1 will be written to the standard output.
D.2 will be written to the standard output.
E.3 will be written to the standard output. -
多项选择题
Whichstatementsconcerningthecorrelationbetweentheinnerandouterinstancesofnon-staticinnerclassesaretrue？（）
A.Member variables of the outer instance are always accessible to inner instances， regardless of their accessibility modifiers.
B.Member variables of the outer instance can never be referred to using only the variable name within the inner instance.
C.More than one inner instance can be associated with the same outer instance.
D.All variables from the outer instance that should be accessible in the inner instance must be declared final.
E.A class that is declared final cannot have any inner classes. -
多项选择题
Whichstatementsconcerningthemethodsnotify（）andnotifyAll（）aretrue？
A.Instances of class Thread have a method called notify（）.
B.A call to the method notify（） will wake the thread that currently owns the monitor of the object.
C.The method notify（） is synchronized.
D.The method notifyAll（） is defined in class Thread.
E.When there is more than one thread waiting to obtain the monitor of an object， there is no way to be sure which thread will be notified by the notify（） method.
