Java认证考试
package foo； public class Outer （ public static class Inner （ ） ） Which statement is true？ （） A、 An instance of the Inner class can be constructed with “new Outer.Inner （）”B、 An instance of the inner class cannot be constructed outside of package fo
题目
package foo； public class Outer （ public static class Inner （ ） ） Which statement is true？ （）
- A、 An instance of the Inner class can be constructed with “new Outer.Inner （）”
- B、 An instance of the inner class cannot be constructed outside of package foo.
- C、 An instance of the inner class can only be constructed from within the outer class.
- D、 From within the package bar， an instance of the inner class can be constructed with “new inner（）”
参考答案和解析
相似问题和答案
第1题：
1. public class Outer{ 2. public void someOuterMethod（） { 3. // Line 3 4. } 5. public class Inner{} 6. public static void main（ String[]argv ） { 7. Outer o = new Outer（）； 8. // Line 8 9. } 10. } Which instantiates an instance of Inner？（）
- A、 new Inner（）； // At line 3
- B、 new Inner（）； // At line 8
- C、 new o.Inner（）； // At line 8
- D、 new Outer.Inner（）； // At line 8
正确答案:A
第2题：
package foo； public class Outer { public static class Inner { } } Which statement is true？（）
- A、 Compilation fails.
- B、 An instance of the Inner class can be constructed with “new Outer.Inner（）”.
- C、 An instance of the Inner class cannot be constructed outside of package foo.
- D、 An instance of the Inner class can be constructed only from within the Outer class.
- E、 From within the package foo， and instance of the Inner class can be constructed with “new Inner（）”.
正确答案:B
第3题：
以下程序的调试结果为?
public class Outer{
public String name = "Outer";
public static void main(String argv[]){
Inner i = new Inner();
i.showName();
}
private class Inner{
String name =new String("Inner");
void showName(){
System.out.println(name);
}
}
}
A.输出结果 Outer
B.输出结果 Inner
C.编译错误，因Inner类定义为私有访问
D.在创建Inner类实例的行出现编译错误
第4题：
Which statement about static inner classes is true？ （）
- A、 An anonymous class can be declared as static.
- B、 A static inner class cannot be a static member of the outer class.
- C、 A static inner class does not require an instance of the enclosing class.
- D、 Instance members of a static inner class can be referenced using the class name of the static inner class.
正确答案:C
第5题：
Which the following two statements are true？（）
- A、 An inner class may be declared as static.
- B、 An anonymous inner class can be declared as public.
- C、 An anonymous inner class can be declared as private.
- D、 An anonymous inner class can extend an abstract class.
- E、 An anonymous inner class can be declared as protected.
正确答案:A,D
第6题：
Which two statements are true？（）
- A、 An inner class may be declared as static.
- B、 An anonymous inner class can be declared as public.
- C、 An anonymous inner class can be declared as private.
- D、 An anonymous inner class can extend an abstract class.
- E、 An anonymous inner class can be declared as protected.
正确答案:A,D
第7题：
Which thefollowingstatements about static inner classes is true？（）
- A、 An anonymous class can be declared as static.
- B、 A static inner class cannot be a static member of the outer class.
- C、 A static inner class does not require an instance of the enclosing class.
- D、 Instance member of a static inner class can be referenced using the class name of the staticinner class.
正确答案:C
第8题：
Which statements concerning the correlation between the inner and outer instances of non-static inner classes are true？（）
- 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.
正确答案:A,C
第9题：
public class OuterClass { private double d1 1.0； //insert code here } You need to insert an inner class declaration at line2. Which two inner class declarations are valid？（）
- A、 static class InnerOne { public double methoda（） {return d1；} }
- B、 static class InnerOne { static double methoda（） {return d1；} }
- C、 private class InnerOne { public double methoda（） {return d1；} }
- D、 protected class InnerOne { static double methoda（） {return d1；} }
- E、 public abstract class InnerOne { public abstract double methoda（）； }
正确答案:C,E
第10题：
package geometry； public class Hypotenuse { public InnerTriangle it = new InnerTriangle（）； class InnerTriangle { public int base； public int height； } } Which is true about the class of an object that can reference the variable base？ （）
- A、 It can be any class.
- B、 No class has access to base.
- C、 The class must belong to the geometry package.
- D、 The class must be a subclass of the class Hypotenuse.
正确答案:C