For the class hierarchy and declarations above, correctly indicate whether each of the following statements will compile and what will happen at runtime (runs correctly or runtime exception). It may be helpful to use scratch paper to keep track of each variable's static and dynamic type.

Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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Please answer question. This is pertaining to Java programming language

3-3

 
public class Avatar
• public Avatar ()
public class Fire extends Avatar
public class Earth extends Avatar
public Fire()
• public Earth ()
Avatar al = new Earth();
= new Fire();
Avatar a2
Earth e = new Earth();
Fire f = new Fire();
For the class hierarchy and declarations above, correctly indicate whether each of the
following statements will compile and what will happen at runtime (runs correctly or
runtime exception). It may be helpful to use scratch paper to keep track of each
variable's static and dynamic type.
1 Avatar avatar
(Avatar) f;
Fire f1 = (Fire) al;
(Fire) a2;
(Fire) e;
2
Fire f2
4
Fire f3 =
1:
[ Select ]
[ Select ]
does not compile
compiles, but runtime exception
compiles and runs
2:
3 : TSeiect j
4: [Select ]
>
>
Transcribed Image Text:public class Avatar • public Avatar () public class Fire extends Avatar public class Earth extends Avatar public Fire() • public Earth () Avatar al = new Earth(); = new Fire(); Avatar a2 Earth e = new Earth(); Fire f = new Fire(); For the class hierarchy and declarations above, correctly indicate whether each of the following statements will compile and what will happen at runtime (runs correctly or runtime exception). It may be helpful to use scratch paper to keep track of each variable's static and dynamic type. 1 Avatar avatar (Avatar) f; Fire f1 = (Fire) al; (Fire) a2; (Fire) e; 2 Fire f2 4 Fire f3 = 1: [ Select ] [ Select ] does not compile compiles, but runtime exception compiles and runs 2: 3 : TSeiect j 4: [Select ] > >
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