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== Software requirements ==

JOSM requires a recent version of [https://www.java.com/en/download/ Java 8] or later runtime environment to be installed on your computer.

If you have only an older Java version and cannot update, there are older versions of JOSM available:
* Version [/download/josm-snapshot-3377.jar 3377] for Java 5.
* Version [/download/josm-snapshot-7000.jar 7000] for Java 6.
* Version [/download/josm-snapshot-10526.jar 10526] for Java 7.

Old versions of JOSM, including Mac and Windows installers, are available in the [/download download archive]. However it is highly recommended to always use the [/Wikistart latest stable version].

If you have only an old version of Java 7 (older than **update 25**, released in June 2013), you can run version 10526 of JOSM, but you may face the following Java bug. To get rid of it, please perform the corresponding update actions.

* #8182: Mac OS: Cannot open files in directories with swedish characters in them -> Update to Java 7 update 10 or later (see [http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7193966 Java bug 7193966])

== Troubleshooting ==

* Launching JOSM on the command line outputs
{{{
Exception in thread "main" java.lang.UnsupportedClassVersionError: JOSM : Unsupported major.minor version 52.0
}}}
  → Make sure to install Java 8 or later as described above.

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