Which two demonstrate an “is a” relationship? (Choose Two) A. public interface Person { } public class Employee extends Person { } B. public interface Shape { } public class Employee extends Shape { } C. public interface Color { } public class Employee extends Color { } D. public class Species { } public class Animal (private Species species;) E. interface Component { } Class Container implements Component ( Private Component[ ] children
正解?
正解?
1. public class enclosingone ( 2. public class insideone{} 3. ) 4. public class inertest( 5. public static void main (string[]args)( 6. enclosingone eo= new enclosingone (); 7. //insert code here 8. ) 9. ) Which statement at line 7 constructs an instance of the inner class? A. InsideOnew ei= eo.new InsideOn(); B. Eo.InsideOne ei = eo.new InsideOne(); C. InsideOne ei = EnclosingOne.new InsideOne(); D. EnclosingOne.InsideOne ei = eo.new InsideOne(); Answer: D
该如何定义呢?
求高人给出正解?
关于D答案,实际上是一种比较偏的写法,几乎都不见的,这个实际上是和实现接口的一样的方式,如果没有猜错的话,是早期研究的结构