Groups > comp.lang.java.programmer > #25849

Re: limitations on using enum as generic parameter

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From	Lew <noone@lewscanon.com>
Newsgroups	comp.lang.java.programmer
Subject	Re: limitations on using enum as generic parameter
Date	Fri, 11 Feb 2011 07:36:36 -0500
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"dalamb@cs.queensu.ca" wrote, quoted or indirectly quoted someone who said :
>> (yes, I know it's in end-of-life, but it would be a bit of trouble
>> right now to go to 1.6 let alone 1.7

Roedy Green wrote:
> It is actually surprisingly easy. Just download the JDK. Install,
> uninstall the old JDK, set JAVA_HOME, optionally recompile the
> universe. Tell your IDE where your new JDK is.  I have yet to find a
> JDK 1.5 program that won't compile and run just fine under JDK 1.6.

It can happen and I've seen it, but they're rare.  A couple of the interfaces 
have changed, notably 'javax.sql.RowSet' and 'java.sql.ResultSet'.  Code that 
implements that interface for Java 5 will not compile correctly for 6 unless 
you implement the new methods.  Also, '@Override' raises a warning if the 
supertype is an interface in 5, but omitting it in that situation raises a 
warning in 6.

It is quite rare to run into the former (most people don't compile their own 
JDBC code, but some do).  The latter is a minor annoyance.

I haven't run into other scenarios where the transition is difficult. 
Normally it's as transparent as Roedy indicates.

> I generate 1.5 class files using the JDK 1.6 compiler with -target
>
> see http://mindprod.com/jgloss/jdk.html

-- 
Lew
Ceci n'est pas une fenêtre.
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|#/ * |   \#|
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|===========|

Thread

limitations on using enum as generic parameter "dalamb@cs.queensu.ca" <david.alex.lamb@gmail.com> - 2011-02-08 09:50 -0800
  Re: limitations on using enum as generic parameter Lew <noone@lewscanon.com> - 2011-02-11 07:36 -0500
  Re: limitations on using enum as generic parameter Daniele Futtorovic <da.futt.news@laposte.net.invalid> - 2011-02-08 20:36 +0100
  Re: limitations on using enum as generic parameter Ken Wesson <kwesson@gmail.com> - 2011-02-08 19:46 +0100
  Re: limitations on using enum as generic parameter Roedy Green <see_website@mindprod.com.invalid> - 2011-02-10 22:50 -0800
  Re: limitations on using enum as generic parameter Roedy Green <see_website@mindprod.com.invalid> - 2011-02-10 22:47 -0800
  Re: limitations on using enum as generic parameter markspace <nospam@nowhere.com> - 2011-02-08 10:34 -0800
    Re: limitations on using enum as generic parameter Lew <lew@lewscanon.com> - 2011-02-08 10:38 -0800

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