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From Rez P <pon...@hotmail.com>
Subject RE: Building with JDK 1.3. Which version of ANT?
Date Thu, 30 Jul 2009 15:01:43 GMT

Thanks for all your help and input.

 


 
> To: user@ant.apache.org
> Subject: Re: Building with JDK 1.3. Which version of ANT?
> From: bodewig@apache.org
> Date: Thu, 30 Jul 2009 12:11:45 +0200
> 
> On 2009-07-30, Rez P <pons32@hotmail.com> wrote:
> 
> > I just got a successful build by using jdk 1.5, ant 1.7, and setting
> > source & target attributes of the javac ant task to 1.3. Do you see
> > any problem with this configuration as far as jdk 1.5 adding
> > unwanted stuff to my generated class files as opposed to, if I set
> > my entire environment to jdk 1.3 and making sure that the old
> > project doesn't become polluted with any new tools or libraries?
> 
> One thing is that you might use classes or methods present in Java 1.5
> but not in 1.3 - this will compile on Java5 but fail if you try to run
> the code on 1.3. This may be possible to avoid if you are disciplined
> enough 8-)
> 
> Unfortunately there are problems more subtle than that. If Java5 (or
> 1.4) have introduced new method overloads the compiler may choose one
> that doesn't exist in 1.3.
> 
> One example that I've encountered myself
> StringBuffer.append(StringBuffer) which was added in Java 1.4. say
> you have
> 
> StringBuffer sb1 = new StringBuffer();
> StringBuffer sb2 = new StringBuffer();
> sb2.append(sb1);
> 
> This will compile fine on both JDKs. javac of JDK 1.3 (and earlier)
> will use append(Object), any later javac will use append(StringBuffer).
> Code compiled on Java 1.4 or later will throw an exception when run on
> Java 1.3 or earlier.
> 
> These kinds of problems are way more difficult to catch when
> "cross-compiling".
> 
> Stefan
> 
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