多项选择题
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.
相关考题
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单项选择题
1. public class ArrayTest { 2. public static void main （String[]args） { 3. float f1[]， f2[]； 4. f1 = new float [10]； 5. f2 = f1； 6. System.out.printIn （“f2[0]=” + f2[0]）； 7. } 8. } What is the result？（）
A. It prints f2[0] = 0.0
B. It prints f2[0] = NaN
C. An error at line 5 causes compile to fail.
D. An error at line 6 causes compile to fail.
E. An error at line 6 causes an exception at runtime. -
单项选择题
ClassOne.java 1. package com.abc.pkg1； 2. public class ClassOne { 3. private char var = ‘a’； 4. char getVar（） {return var；} 5. } ClassTest.java 1. package com.abc.pkg2； 2. import com.abc.pkg1.ClassOne； 3. public class ClassTest extends ClassOne { 4. public static void main（String[]args） { 5. char a = new ClassOne（）.getVar（）； 6. char b = new ClassTest（）.getVar（）； 7. } 8. } What is the result？（）
A. Compilation will fail.
B. Compilation succeeds and no exceptions are thrown.
C. Compilation succeeds but an exception is thrown at line 5 in ClassTest.java.
D. Compilation succeeds but an exception is thrown at line 6 in ClassTest.java. -
多项选择题
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？（）
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）{}
