单项选择题

What is the result？（）

A.Compilation of class A fails.
B.Line 28 prints the value 3 to System.out.
C.Line 28 prints the value 1 to System.out.
D.A runtime error occurs when line 25 executes.
E.Compilation fails because of an error on line 28.

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单项选择题

Which code， inserted at line 15， creates an instance of the Point class defined in Line？（）

A.Point p = new Point（）；
B.Line.Point p = new Line.Point（）；
C.The Point class cannot be instatiated at line 15.
D.Line l = new Line（）； l.Point p = new l.Point（）；

单项选择题

What is the result？（）

A.Mr. John Doe
B.An exception is thrown at runtime.
C.Compilation fails because of an error in line 12.
D.Compilation fails because of an error in line 15.
E.Compilation fails because of an error in line 20.

单项选择题

Which code， inserted at line 15， allows the class Sprite to compile？（）

A.Foo{public int bar（）{return 1；}}
B.new Foo{public int bar（）{return 1；}}
C.new Foo（）{public int bar（）{return 1；}}
D.new class Foo{public int bar（）{return 1；}}