# Upgrading to a newer version of Java **URL:** \ **Category:** Technical Support & Bugs\ **Created:** [September 8, 2019, 11:39pm UTC](https://forum.vassalengine.org/t/upgrading-to-a-newer-version-of-java/10005 "2019-09-08T23:39:45Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![uckelman](https://forum.vassalengine.org/user_avatar/forum.vassalengine.org/uckelman/32/10020_2.png) [@uckelman](https://forum.vassalengine.org/u/uckelman)\ **Post date:** [September 8, 2019, 11:39pm UTC](https://forum.vassalengine.org/t/upgrading-to-a-newer-version-of-java/10005/1 "2019-09-08T23:39:45Z")
I’ve been banging my head against the wall for a few weeks now to have a test build working with a version of Java newer than Java 8. Just a few minutes ago I solved the last major issue I know of, which was working around the fact that the classes we use to play sound were deprecated and then removed after Java 8. Expect a test build sometime this week. ---
**Author:** ![tar](https://forum.vassalengine.org/user_avatar/forum.vassalengine.org/tar/32/21_2.png) [@tar](https://forum.vassalengine.org/u/tar)\ **Post date:** [September 10, 2019, 12:32am UTC](https://forum.vassalengine.org/t/upgrading-to-a-newer-version-of-java/10005/2 "2019-09-10T00:32:39Z")
Hooray! On Sun, Sep 8, 2019 at 4:40 PM uckelman [uckelman@nomic.net](mailto:uckelman@nomic.net) wrote: > I’ve been banging my head against the wall for a few weeks now to have a > test build working with a version of Java newer than Java 8. Just a few > minutes ago I solved the last major issue I know of, which was working > around the fact that the classes we use to play sound were deprecated > and then removed after Java 8. > > Expect a test build sometime this week. > > * * * > > Read this topic online here: > [Upgrading to a newer version of Java](https://forum.vassalengine.org/t/upgrading-to-a-newer-version-of-java/10005/1) > > * * * > > messages mailing list > [messages@vassalengine.org](mailto:messages@vassalengine.org) > [vassalengine.org/mailman/listinfo/messages](http://www.vassalengine.org/mailman/listinfo/messages) ---
**Author:** ![uckelman](https://forum.vassalengine.org/user_avatar/forum.vassalengine.org/uckelman/32/10020_2.png) [@uckelman](https://forum.vassalengine.org/u/uckelman)\ **Post date:** [September 11, 2019, 11:01pm UTC](https://forum.vassalengine.org/t/upgrading-to-a-newer-version-of-java/10005/3 "2019-09-11T23:01:01Z")
Test build: [vassalengine.sourceforge.net/builds/](http://vassalengine.sourceforge.net/builds/) 3.2.18-svn9251 is compiled with Java 11 to work with Java 9 or later. It WILL NOT work with anything less than Java 9. Please give this build a try and let me know what you find. ---
**Author:** ![GianniVacca](https://forum.vassalengine.org/user_avatar/forum.vassalengine.org/giannivacca/32/239_2.png) [@GianniVacca](https://forum.vassalengine.org/u/GianniVacca)\ **Post date:** [September 24, 2019, 9:34pm UTC](https://forum.vassalengine.org/t/upgrading-to-a-newer-version-of-java/10005/4 "2019-09-24T21:34:42Z")
I have tried version VASSAL-3.2.18-svn9251 with a freshly-installed JDK SE 11, and upon launching VASSAL I get an error pop-up with the following error message: This application requires a Java Runtime Environment 1.5.0 ---
**Author:** ![uckelman](https://forum.vassalengine.org/user_avatar/forum.vassalengine.org/uckelman/32/10020_2.png) [@uckelman](https://forum.vassalengine.org/u/uckelman)\ **Post date:** [September 25, 2019, 7:13pm UTC](https://forum.vassalengine.org/t/upgrading-to-a-newer-version-of-java/10005/5 "2019-09-25T19:13:42Z")
Thus spake GianniVacca: > I have tried version **VASSAL-3.2.18-svn9251** with a freshly-installed > JDK SE **11** , and upon launching VASSAL I get an error pop-up with the > following error message: > This application requires a Java Runtime Environment 1.5.0 We need more details to know what went wrong, such as what OS you’re using, how you’re launching VASSAL, and what’s in the errorLog. – J. ---
**Author:** ![GianniVacca](https://forum.vassalengine.org/user_avatar/forum.vassalengine.org/giannivacca/32/239_2.png) [@GianniVacca](https://forum.vassalengine.org/u/GianniVacca)\ **Post date:** [September 26, 2019, 7:46am UTC](https://forum.vassalengine.org/t/upgrading-to-a-newer-version-of-java/10005/6 "2019-09-26T07:46:33Z")
> such as what OS you’re using Win7 Professional > how you’re launching VASSAL I’ve tried both double-clicking on the icon, and entering the following in a cmd window: java -jar Vengine.jar > and what’s in the errorLog. When I use the command line I only have the following: VASSAL: IO error java.io.IOException at VASSAL.launch.ModuleManager.main(ModuleManager.java:164) Caused by: java.nio.channels.OverlappingFileLockException at sun.nio.ch.SharedFileLockTable.checkList(Unknown Source) at sun.nio.ch.SharedFileLockTable.add(Unknown Source) at sun.nio.ch.FileChannelImpl.tryLock(Unknown Source) at java.nio.channels.FileChannel.tryLock(Unknown Source) at VASSAL.launch.ModuleManager.main(ModuleManager.java:161) Is there more I can find somewhere?