• Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Ron McLeod
  • Rob Spoor
  • Tim Cooke
  • Junilu Lacar
Sheriffs:
  • Henry Wong
  • Liutauras Vilda
  • Jeanne Boyarsky
Saloon Keepers:
  • Jesse Silverman
  • Tim Holloway
  • Stephan van Hulst
  • Tim Moores
  • Carey Brown
Bartenders:
  • Al Hobbs
  • Mikalai Zaikin
  • Piet Souris

enum - couple of questions

 
Ranch Hand
Posts: 68
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hello Friends,

I have couple of questions on enum.

Q1: is it necessary that enum constants should be in the first place with comma separated once I declare like

enum TEST{
SHAPE, BALL, PEN; -> Correct one
}

enum TEST{
int j;
SHAPE, BALL, PEN; -> WRONG ONE. Since constants are not in first place.

so the bottom line for the first question is, If at all I have enum costants that should be in the first line is it right ?

Q2:

I have an emum like

enum MyEnum{
WATER,BOOK,CYCLE;
int i;
MyEnum(int i){
this.i=i;
}

-> I can not have these because there is one arg constructor declared so I need to have all the constants to be declared like WATER(2), BOOK(4),
CYCLE(9)
is it correct ?

q3: I can have enums declared in another enum and like a chain right ? this is something like inner classes. So in this case all the inner class rules apply to these enums also ?


q4: Is enum follow like class hierarchy ?

Hope my questions are not stupid. Thanks for the answers.


}
 
Ranch Hand
Posts: 2023
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Chapter 3: Enumerated Types (PDF Format) from Java 5.0 Tiger
 
susan waters
Ranch Hand
Posts: 68
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
This is usefull link and it answers my questions. Thanks very much.
 
wise owen
Ranch Hand
Posts: 2023
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Collection Links for SCJP 1.5
 
Consider Paul's rocket mass heater.
reply
    Bookmark Topic Watch Topic
  • New Topic