An instance of the Inner class can be constructed with “new Outer.Inner ()”
An instance of the inner class cannot be constructed outside of package foo.
An instance of the inner class can only be constructed from within the outer class.
From within the package bar, an instance of the inner class can be constructed with “new inner()”
第1题:
Which declaration prevents creating a subclass of an outer class?()
第2题:
Which statement about static inner classes is true?()
第3题:
package foo; public class Outer ( public static class Inner ( ) ) Which statement is true? ()
第4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?()
第5题:
public class Test { public static void main(String args[]) { class Foo { public int i = 3; } Object o = (Object)new Foo(); Foo foo = (Foo)o; System.out.println(“i = “ + foo.i); } } What is the result?()
第6题:
class Birds { public static void main(String [] args) { try { throw new Exception(); } catch (Exception e) { try { throw new Exception(); } catch (Exception e2) { System.out.print("inner "); } System.out.print("middle "); } System.out.print("outer "); } } 结果为:()
第7题:
new Inner(); // At line 3
new Inner(); // At line 8
new o.Inner(); // At line 8
new Outer.Inner(); // At line 8
第8题:
An inner class may be declared as static.
An anonymous inner class can be declared as public.
An anonymous inner class can be declared as private.
An anonymous inner class can extend an abstract class.
An anonymous inner class can be declared as protected.
第9题:
i = 3
Compilation fails.
A ClassCastException is thrown at line 6.
A ClassCastException is thrown at line 7.
第10题:
A static inner class requires a static initializer.
A static inner class requires an instance of the enclosing class.
A static inner class has no reference to an instance of the enclosing class.
A static inner class has access to the non-static members of the outer class.
Static members of a static inner class can be referenced using the class name of the static inner class.
第11题:
static class InnerOne { public double methoda() {return d1;} }
static class InnerOne { static double methoda() {return d1;} }
private class InnerOne { public double methoda() {return d1;} }
protected class InnerOne { static double methoda() {return d1;} }
public abstract class InnerOne { public abstract double methoda(); }
第12题:
An anonymous class can be declared as static.
A static inner class cannot be a static member of the outer class.
A static inner class does not require an instance of the enclosing class.
Instance members of a static inner class can be referenced using the class name of the static inner class.
第13题:
public class Base { public static final String FOO = “foo”; public static void main(String[] args) { Base b = new Base(); Sub s = new Sub(); System.out.print(Base.FOO); System.out.print(Sub.FOO); System.out.print(b.FOO); System.out.print(s.FOO); System.out.print(((Base)s).FOO); } } class Sub extends Base {public static final String FOO=bar;} What is the result?()
第14题:
Which thefollowingstatements about static inner classes is true?()
第15题:
Which the following two statements are true?()
第16题:
class One { public One foo() { return this; } } class Two extends One { public One foo() { return this; } } class Three extends Two { // insert method here } Which two methods, inserted individually, correctly complete the Three class?()
第17题:
Which statements about static inner classes are true?()
第18题:
Static class FooBar{}
Private class FooBar{}
Abstract public class FooBar{}
Final public class FooBar{}
Final abstract class FooBar{}
第19题:
java Commander
java com.sim.sjcp.Commander
java com/sun/sjcp/Commander
java-cpcom.sun.sjcp Commander
java-cpcom/sun/sjcp Commander
第20题:
An inner class may be declared as static.
An anonymous inner class can be declared as public.
An anonymous inner class can be declared as private.
An anonymous inner class can extend an abstract class.
An anonymous inner class can be declared as protected.
第21题:
An anonymous class can be declared as static.
A static inner class cannot be a static member of the outer class.
A static inner class does not require an instance of the enclosing class.
Instance member of a static inner class can be referenced using the class name of the staticinner class.
第22题:
Compilation fails.
An instance of the Inner class can be constructed with “new Outer.Inner()”.
An instance of the Inner class cannot be constructed outside of package foo.
An instance of the Inner class can be constructed only from within the Outer class.
From within the package foo, and instance of the Inner class can be constructed with “new Inner()”.
第23题:
foofoofoofoofoo
foobarfoobarbar
foobarfoofoofoo
foobarfoobarfoo
barbarbarbarbar
foofoofoobarbar
foofoofoobarfoo