你可能感興趣的試題

class One { 
public One（） { System.out.print（1）； } 
} 
class Two extends One { 
public Two（） { System.out.print（2）； } 
} 
class Three extends Two { 
public Three（） { System.out.print（3）； } 
} 
public class Numbers{ 
public static void main（ String[] argv） { new Three（）； } 
} 
What is the result when this code is executed？（） 

10. class Line { 
11. public class Point { public int x，y； } 
12. public Point getPoint（） { return new Point（）； } 
13. } 
14. class Triangle { 
15. public Triangle（） { 
16. // insert code here 
17. } 
18. } 
Which code， inserted at line 16， correctly retrieves a local instance of a Point object？（）