[OSM-dev] which Java Verison to use (1.6 vs. 1.5); was: Error compiling osmosis
andreaskalsch at gmx.de
Sun Dec 28 13:40:50 GMT 2008
It is OK that Osmosis supports just 1.6, because it has no UI (has it?).
So there are 2 reasons:
- You use it more on servers with Linux, so 1.6 is supported.
- The user has the competence to deal with this kind of things,
including setting up his own DB.
JOSM - in opposite - should be as easy as possible to use (= downloading
and starting to edit), so that as many people as possible contribute to OSM.
So focus on new features and don't try to support ancient versions.
Brett Henderson schrieb:
> Sending this to dev because I'm curious to hear thoughts from the JOSM guys.
> I agree it would be nice to standardise but the reasons for the
> difference as I understand it are:
> JOSM is an end user tool where wide platform support is necessary. Java
> 1.5 is more widely available than Java 1.6. OSX in particular hasn't
> had support for 1.6, not sure if that's changed yet. JOSM is
> maintaining compatibility with Java 1.5. *However* it should be
> possible to compile JOSM on Java 1.6, it just won't run on 1.5 if you do
> so. There may be some warnings around the use of the @Override
> annotation (I don't know the details here) but I don't think these
> should be show stoppers.
> Osmosis is newer than JOSM, and is less end-user focused. I don't
> support 1.5 because I'm using some newer features of the 1.6 platform.
> From memory, these are Java 2D libraries required for accurate polygon
> support, concurrent libraries, and collection libraries. Of these it
> might be possible to support 1.5 with some additional effort but the
> polygon support in particular is hard to do properly on 1.5 because 1.6
> added "double" accuracy 2D calculations.
> Here's my suggestion. OpenJDK is a Java 1.6 platform. I assume that is
> what Debian will provide out of the box. Compile both JOSM and Osmosis
> using this 1.6 platform. They will both then run on the OpenJDK
> provided by Debian. Neither will run on older 1.5 JDKs. You aren't
> building binary distributions of JOSM for cross-platform use therefore
> you don't need to support 1.5.
> 1.6 provides some very useful features, it has been released for around
> 2 years now, and is supported on the vast majority of platforms out
> there. Supporting 1.5 just isn't a high priority for me. With the open
> source OpenJDK out there I was hoping the need to support ancient java
> releases would be eliminated.
> Thoughts welcome.
> Joerg Ostertag (OSM Tettnang/Germany) wrote:
>> OK ...
>> so josm doesn't want java 1.6
>> and osmosis doesn't want java 1.5
>> This doesn't really make it easy to create debian packages out of these ...
>> Couldn't we agree on one Version of Java for all OSM Software. This would
>> macke packaging much easier for me.
>> On Mittwoch 24 Dezember 2008, you wrote:
>>> The minimum required java version for osmosis is 1.6. You appear to be
>>> using version 1.5.
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