Release

The latest release is JOSM 1.5. Get it at: ​http://josm.openstreetmap.de/download/josm-1.5.jar. The hotlink to the always latest release is ​http://josm.openstreetmap.de/download/josm.jar

Nightly Builds

You can always grab the latest nightly build - version from ​http://josm.openstreetmap.de/download/josm-latest.jar. It is usually pretty stable too.

Getting the Source

JOSM is available under GPL, and so of course you can get the sources and compile, modify or redistribute it by yourself. You can grab the sources via ​subversion

svn co ​http://josm.openstreetmap.de/svn/trunk josm

Or using git:

git svn clone ​http://josm.openstreetmap.de/svn/trunk josm

Or you can inspect single files over the web frontend at ​http://josm.openstreetmap.de/svn.

Compiling

Using ant

The easiest way to compile JOSM provided Java on your machine is properly set up is to go to the josm directory and type:

 ant

That will create a dist/josm-custom.jar file if successful.

Using eclipse

Use eclipse and the provided .project and .classpath file. Just add a new Java Project using the JOSM source folder as existing path.

Using javac

You can also build josm without ant or eclipse. To do so, change into the src/ folder and call javac on the file org/openstreetmap/josm/Main with all libs from ../lib/*.jar in your classpath (you have to specify all subsequent). If running linux, be sure to have your JAVA_HOME set.

As example, this could look like:

 $ cd ~/src
 $ svn co http://josm.openstreetmap.de/svn josm
 ''tons of output here''
 $ export JAVA_HOME=/usr/local/jdk1.5.0
 $ cd josm/src
 $ javac -cp .:../lib/MinML2.jar:../lib/metadata-extractor-2.3.1.jar:../lib/gettext-common-0.9.jar org/openstreetmap/josm/gui/MainApplication.java

Running

Microsoft Windows

Double clicking on the jar file.

If this does not help, you probably need to install ​Java

If you want to be able to handle more points in JOSM you can create a shortcut like the following example:

C:\WINNT\system32\java.exe -jar -Xmx512M "C:\PATH-TO-JOSM\josm-latest.jar"

Linux / *BSD

using the shell

Go to the directory where the josm-latest.jar is and type

java -jar josm-latest.jar

to launch. Replace ''josm-latest.jar'' with the name of the jar file you loaded, e.G. josm.jar for releases.

If this don't help, try to set you JAVA_HOME variable to the java location (the root location, not the bin. As example:

 export JAVA_HOME=/usr/lib/sun-j2se5.0-jdk
 java -jar ''josm.jar''

KDE

There is a ​tutorial on how to setup your environment to start jar-files by clicking on them.

GNOME

Right click on the JAR file, and select Open with "Sun Java 5.0 Runtime", or whatever java version you have.

XGL/Compiz

Type this into a shell:

export AWT_TOOLKIT=MToolkit && java -jar josm-test.jar

as described here: ​http://kubasik.net/blog/index.php/2006/06/19/java-sun-150-and-xglcompiz-on-ubuntu/

MacOS

Just click on the jar-file.