单选题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） }ACode marked with （1） is a constructorBCode marked with （2） is a constructorCCode marked with （3） is a constructorDCode marked with （4） is a constructorECode marked with （5） is a Constructor
单选题
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
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