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多选题
class A { A（） { } } class B extends A { } Which two statements are true？（）
A
Class B’s constructor is public.
B
Class B’s constructor has no arguments.
C
Class B’s constructor includes a call to this（）.
D
Class B’s constructor includes a call to super（）.
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关于constructor,下列描述正确的是()。
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考题
class A { A（） { } } class B extends A { } Which two statements are true？（）A、 Class B’s constructor is public.B、 Class B’s constructor has no arguments.C、 Class B’s constructor includes a call to this（）.D、 Class B’s constructor includes a call to super（）.
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Which two statements are true regarding the creation of a default constructor？（） A、 The default constructor initializes method variables.B、 The default constructor invokes the no-parameter constructor of the superclass.C、 The default constructor initializes the instance variables declared in the class.D、 If a class lacks a no-parameter constructor，， but has other constructors， the compiler creates a default constructor.E、 The compiler creates a default constructor only when there are no other constructors for the class.
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In which two cases does the compiler supply a default constructor for class A？（） A、 class A{}B、 class A { public A（）{} }C、 class A { public A（int x）{} }D、 class Z {} class A extends Z { void A（）{} }
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Which two statements are true regarding the creation of a default constructor？（） A、 The default constructor initializes method variables.B、 The compiler always creates a default constructor for every class.C、 The default constructor invokes the no-parameter constructor of the superclass.D、 The default constructor initializes the instance variables declared in the class.E、 When a class has only constructors with parameters， the compiler does not create a default constructor.
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AnInterface is an interface. AnAdapter0 is a non-abstract， non-final class with a zero argument constructor. AnAdapter1 is a non-abstract， non-final class without a zero argument constructor， but with a constructor that takes one int argument. Which two construct an anonymous inner class？（） A、AnAdapter1 aa=new AnAdapter1（）{}B、AnAdapter0 aa=new AnAdapter0（）{}C、AnAdapter0 aa=new AnAdapter0（5）{}D、AnAdapter1 aa=new AnAdapter1（5）{}E、AnInterface a1=new AnInterface（5）{}
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You are creating a Windows Forms application by using the .NET Framework 3.5. You plan to develop a new control for the application.The control will have the same properties as a TextBox control.You need to ensure that the control has a transparent background when it is painted on form.You want to achieve this goal by using the minimum amount of development effort.What should you do？（）A、Create a new class that is derived from the Control class.Call the SetStyle method in the constructor.B、Create a new class that is derived from theTextBox control class.Override the OnPaint method in the constructor.C、Create a new class that is derived from the Control class.Set the BackColor property of the control to Transparent.Call the SetStyle method in the constructor.D、Create a new class that is derived from theTextBox control class.Set the BackColor property of the control to Transparent in the constructor.Call the SetStyle method in the constructor.
考题
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Create a new class that is derived from the Control class.Call the SetStyle method in the constructor.B
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Create a new class that is derived from the Control class.Set the BackColor property of the control to Transparent.Call the SetStyle method in the constructor.D
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考题
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多选题You are creating a new JSP page and you need to execute some code that acts when the page is firstexecuted， but only once. Which three are possible mechanisms for performing this initialization code？（）AIn the init method.BIn the jspInit method.CIn the constructor of the JSP’s Java code.DIn a JSP declaration， which includes an initializer block.EIn a JSP declaration， which includes a static initializer block.
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多选题AnInterface is an interface. AnAdapter0 is a non-abstract， non-final class with a zero argument constructor. AnAdapter1 is a non-abstract， non-final class without a zero argument constructor， but with a constructor that takes one int argument. Which two construct an anonymous inner class？ （）AAnAdapter1 aa=new AnAdapter1（）{}BAnAdapter0 aa=new AnAdapter0（）{}CAnAdapter0 aa=new AnAdapter0（5）{}DAnAdapter1 aa=new AnAdapter1（5）{}EAnInterface a1=new AnInterface（5）{}
考题
多选题In which two cases does the compiler supply a default constructor for class A？（）Aclass A{}Bclass A { public A（）{} }Cclass A { public A（int x）{} }Dclass Z {} class A extends Z { void A（）{} }
考题
多选题class A { A（） { } } class B extends A { } Which two statements are true？（）AClass B’s constructor is public.BClass B’s constructor has no arguments.CClass B’s constructor includes a call to this（）.DClass B’s constructor includes a call to super（）.
考题
多选题Which two statements are true regarding the creation of a default constructor？（）AThe default constructor initializes method variables.BThe compiler always creates a default constructor for every class.CThe default constructor invokes the no-parameter constructor of the superclass.DThe default constructor initializes the instance variables declared in the class.EWhen a class has only constructors with parameters， the compiler does not create a default constructor.
考题
多选题Which two statements are true regarding the creation of a default constructor？（）AThe default constructor initializes method variables.BThe default constructor invokes the no-parameter constructor of the superclass.CThe default constructor initializes the instance variables declared in the class.DIf a class lacks a no-parameter constructor，， but has other constructors， the compiler creates a default constructor.EThe compiler creates a default constructor only when there are no other constructors for the class.
考题
( 难度：中等)下列关于constructor说法正确的有（）。A.constructor在一个对象被new时执行B.constructor必须与class同名，但方法不能与class同名C.class中的constructor不可省略D.一个class只能定义一个constructor
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