"...on Windows not so easy." Would this be a reason to write an OpenJUMP launcher in a DotNET language like C#? Then we could compile the launcher to a .exe using an open source IDE like SharpDevelop.
The Sunburned Surveyor On 9/24/07, Paul Austin <[EMAIL PROTECTED]> wrote: > Landon, > > To do it in the batch file you would need to be able to do something > like java --version and then extract the version string from it. Then do > some parsing on the line that contains the version to convert it to a > meaningful double so you could compare it. Now doing that in unix is > "fairly" easy, on Windows not so easy. > > Then you have to take into account different versions of java (e.g. Sun > v.s. blackdown) may have slightly different formats for how the version > is displayed. > > Paul > > Sunburned Surveyor wrote: > > Maybe I misspoke. I was thinking we could do the check in the batch > > file itself, and not in any of OpenJUMP's Java source code. > > > > Is that possible? > > > > Landon > > > > On 9/24/07, Paul Austin <[EMAIL PROTECTED]> wrote: > > > >> In the JUMP launcher we can look at the SystemProperty > >> java.specification.version to make sure it is >= 1.5 if not we display a > >> window that says you must have version 1.5 or greater and maybe provide > >> a clickable link to the Java site. Unfortunately if we compile that > >> class with 1.5 they won't even get that far. > >> > >> > >> Paul > >> > >> > >> Larry Becker wrote: > >> > >>> After looking over the literature, I don't see a cross-platform > >>> solution that wouldn't add to the potential problem. I'm concerned > >>> that it might incorrectly stop JUMP from running when it was actually > >>> possible, due to variations in the platform and JVM. > >>> > >>> If it makes it as far as displaying the splash screen before lockup, > >>> we could simply add the text "Java version 1.5 or higher required" to > >>> the splash screen. That way when it locks up, at least the user is > >>> looking at a possible solution. > >>> > >>> regards, > >>> Larry > >>> > >>> On 9/24/07, *Sunburned Surveyor* <[EMAIL PROTECTED] > >>> <mailto:[EMAIL PROTECTED]>> wrote: > >>> > >>> Jukka, > >>> > >>> I have no idea how we might handle the JRE version in the batch script > >>> on Windows or Linux. Maybe Larry or Paul have suggestions? > >>> > >>> Maybe we need to add a switch statement to the batch script that uses > >>> the "java -version" command and prints an error message if the > >>> installed version isn't appropriate. > >>> > >>> If Larry and Paul can confirm I'll see if I can modify the launch > >>> scripts to do this. > >>> > >>> The Sunburned Surveyor > >>> > >>> On 9/23/07, Rahkonen Jukka <[EMAIL PROTECTED] > >>> <mailto:[EMAIL PROTECTED]>> wrote: > >>> > Hi, > >>> > > >>> > Could it be possible/simple to add some kind of Java version > >>> check during OpenJUMP startup? We have lots of Java Web Start > >>> applications, an with them the minimum (or even strict) Java > >>> version can be advertised in the .jnlp file. For the same reason > >>> our users may need several Java JRE versions installed, and > >>> sometimes it is hard to know which is the default one that is > >>> started by openjump.bat file. Users would be better off if they'd > >>> see message like "Java version 1.x or higher required" instead of > >>> nothing at all, all perhaps something as informative as "Unable to > >>> launch". > >>> > > >>> > -Jukka Rahkonen- > >>> > > >>> > > >>> > >>> ------------------------------------------------------------------------- > >>> > This SF.net email is sponsored by: Microsoft > >>> > Defy all challenges. Microsoft(R) Visual Studio 2005. > >>> > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > >>> > _______________________________________________ > >>> > Jump-pilot-devel mailing list > >>> > Jump-pilot-devel@lists.sourceforge.net > >>> <mailto:Jump-pilot-devel@lists.sourceforge.net> > >>> > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > >>> <https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel> > >>> > > >>> > >>> > >>> ------------------------------------------------------------------------- > >>> This SF.net email is sponsored by: Microsoft > >>> Defy all challenges. Microsoft(R) Visual Studio 2005. > >>> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > >>> _______________________________________________ > >>> Jump-pilot-devel mailing list > >>> Jump-pilot-devel@lists.sourceforge.net > >>> <mailto:Jump-pilot-devel@lists.sourceforge.net> > >>> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > >>> > >>> > >>> > >>> > >>> -- > >>> http://amusingprogrammer.blogspot.com/ > >>> ------------------------------------------------------------------------ > >>> > >>> ------------------------------------------------------------------------- > >>> This SF.net email is sponsored by: Microsoft > >>> Defy all challenges. Microsoft(R) Visual Studio 2005. > >>> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > >>> ------------------------------------------------------------------------ > >>> > >>> _______________________________________________ > >>> Jump-pilot-devel mailing list > >>> Jump-pilot-devel@lists.sourceforge.net > >>> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > >>> > >>> > >> ------------------------------------------------------------------------- > >> This SF.net email is sponsored by: Microsoft > >> Defy all challenges. Microsoft(R) Visual Studio 2005. > >> http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > >> _______________________________________________ > >> Jump-pilot-devel mailing list > >> Jump-pilot-devel@lists.sourceforge.net > >> https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > >> > >> > > > > ------------------------------------------------------------------------- > > This SF.net email is sponsored by: Microsoft > > Defy all challenges. Microsoft(R) Visual Studio 2005. > > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > > _______________________________________________ > > Jump-pilot-devel mailing list > > Jump-pilot-devel@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > > > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2005. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > Jump-pilot-devel mailing list > Jump-pilot-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel > ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Jump-pilot-devel mailing list Jump-pilot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jump-pilot-devel
