单项选择题
How do objects pass messages in Java？（）
A.They pass messages by modifying each other’s member variables
B.They pass messages by modifying the static member variables of each other’s classes
C.They pass messages by calling each other’s instance member methods
D.They pass messages by calling static member methods of each other’s classes.
相关考题
-
多项选择题
Given that Thing is a class， how many objects and reference variables are created by the following code？（） Thing item， stuff； item = new Thing（）； Thing entity = new Thing（）；
A.One object is created
B.Two objects are created
C.Three objects are created
D.One reference variable is created
E.Two reference variables are created
F.Three reference variables are created. -
单项选择题
Which line contains a constructor in this class definition？（） public class Counter { // （1） int current， step； public Counter（int startValue， int stepValue） { // （2） set（startValue）； setStepValue（stepValue）； } public int get（） { return current； } // （3） public void set（int value） { current = value； } // （4） public void setStepValue（int stepValue） { step = stepValue； } // （5） }
A.Code marked with （1） is a constructor
B.Code marked with （2） is a constructor
C.Code marked with （3） is a constructor
D.Code marked with （4） is a constructor
E.Code marked with （5） is a Constructor -
单项选择题
Aninstancemember（）
A.is also called a static member
B.is always a variable
C.is never a method
D.belongs to a single instance， not to the class as a whole
E.always represents an operation
