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Questa pagina fornisce i passaggi di base per l'installazione di JOSM e le informazioni per la risoluzione dei problemi. Per iniziare a lavorare con JOSM, consulta le pagine Introduction e Help. E per questioni molto complesse vedi le Note d'Installazione (en).

Opzioni raccommandate

Avvia josm.jnlp (versione testata più recente)
Versione raccomandata, per tutte le piattaforme, aggiornata automaticamente, con cadenza mensile, alla più recente versione testata (how to start).

Scarica josm-tested.jar (versione testata 19439)
Tutte le piattaforme (how to run).

Tutte le opzioni di download

Ogni mese il team di JOSM rilascia (en) una versione testata per il download. Le varianti per MS Windows ed Apple macOS sono compilate su questa versione testata. Quando si clicca su josm.jnlp per lanciare JOSM, si otterrà sempre la versione testata più recente. Web Start (en) di Java è il meccanismo che lo rende possibile.

Ogni notte il sistema di compilazione genera un'ultima versione. Queste versioni possono contenere eroori anche gravi ma, di solito, funzionano bene. Per l'ultima versione è disponibile anche una variante Web Start.

	Per tutti i sistemi operativi						In sviluppo
Versione	Web Start	Download	Windows	Apple macOS	Ubuntu, Debian…	openSUSE	Jar / Javadoc / Source
testata 19439	josm.jnlp	josm-tested.jar	josm-setup.exe josm-setup.msi ​Microsoft Store (vedi sotto)	JOSM macOS .zip package o (homebrew)	vedi sotto	vedi sotto	josm:19439
latest 19472	latest.jnlp	josm-latest.jar			vedi sotto		Usa gli snapshots
older		download/		​compilazioni automatiche della JOSM.app	pool/		versioni testate

Quando si avviano gli script si prega di controllare prima su ultima, testata o tutte per ridurre il consumo di banda in download.

Eliminare le traduzioni
Se la dimensione del download è un problema, sono disponibili file più piccoli della versione testata. Per i download contenenti solo inglese, aggiungi ?lang=en all'URL. Per includere una traduzione, sostituisci en con il codice della lingua (en) che desideri (primo carattere minuscolo, solo per le lingue supportate). È possibile ridurre ulteriormente le dimensioni del file eliminando le informazioni di firma aggiungendo ?unsigned=1.

Linux Repositories

JOSM's Debian based mainly for Ubuntu

This is our own package repository primarily for Ubuntu. It should also work with other Debian based (especially Ubuntu based) distributions, but we do not actively test and maintain any distributions other than Ubuntu.

The repository contains two packages:

• josm – Provides the tested version (stable). Replaces the package from the official repository of your distribution. The default JOSM directories name is set to JOSM.
• josm-latest – The latest version (nightly). Can be installed in parallel to the josm package, therefore the default JOSM directories name is set to JOSM-latest.

Both packages provide /etc/default/josm respectively /etc/default/josm-latest as config file for java options (en).

In addition to the regular procedure described below, older DEBs can be manually downloaded from the archives.

Installation

Edit the package resource list /etc/apt/sources.list.d/josm.list:

sudo editor /etc/apt/sources.list.d/josm.list

and add one of the following lines according to your Ubuntu-Version:

deb [signed-by=/usr/local/share/keyrings/josm-apt.gpg] https://josm.openstreetmap.de/apt lunar universe
deb [signed-by=/usr/local/share/keyrings/josm-apt.gpg] https://josm.openstreetmap.de/apt kinetic universe
deb [signed-by=/usr/local/share/keyrings/josm-apt.gpg] https://josm.openstreetmap.de/apt jammy universe
deb [signed-by=/usr/local/share/keyrings/josm-apt.gpg] https://josm.openstreetmap.de/apt impish universe
deb [signed-by=/usr/local/share/keyrings/josm-apt.gpg] https://josm.openstreetmap.de/apt hirsute universe
deb [signed-by=/usr/local/share/keyrings/josm-apt.gpg] https://josm.openstreetmap.de/apt groovy universe
deb [signed-by=/usr/local/share/keyrings/josm-apt.gpg] https://josm.openstreetmap.de/apt focal universe
deb [signed-by=/usr/local/share/keyrings/josm-apt.gpg] https://josm.openstreetmap.de/apt eoan universe
deb [signed-by=/usr/local/share/keyrings/josm-apt.gpg] https://josm.openstreetmap.de/apt disco universe
deb [signed-by=/usr/local/share/keyrings/josm-apt.gpg] https://josm.openstreetmap.de/apt bionic universe

# For other Debian based distributions add:
deb [signed-by=/usr/local/share/keyrings/josm-apt.gpg] https://josm.openstreetmap.de/apt alldist universe

Alternatively, this can be done with the following one-liner in Ubuntu (not for Ubuntu based distributions like Linux Mint):

echo "deb [signed-by=/usr/local/share/keyrings/josm-apt.gpg] https://josm.openstreetmap.de/apt $(lsb_release -sc) universe" | sudo tee /etc/apt/sources.list.d/josm.list > /dev/null

or for Linux Mint:

echo "deb [signed-by=/usr/local/share/keyrings/josm-apt.gpg] https://josm.openstreetmap.de/apt $(grep ^DISTRIB_CODENAME= /etc/upstream-release/lsb-release| awk -F = '{print $(2)}') universe" | sudo tee /etc/apt/sources.list.d/josm.list > /dev/null

Download the public key:

# Create the directory for manually downloaded keys if it was not already created
sudo mkdir -p /usr/local/share/keyrings
# Download the key
wget -q https://josm.openstreetmap.de/josm-apt.key -O- | sudo gpg --dearmor -o /usr/local/share/keyrings/josm-apt.gpg

In the past, instructions used apt-key. If the key was added to system's keyring, following line will remove it:

sudo apt-key del $(apt-key list | grep -B1  "<josm-dev@openstreetmap.org>" | sed '$d' | cut -b 48-51,53-57)

Now refresh your sources:

# You may need to install ssl support for apt in advance:
sudo apt-get install apt-transport-https
# Refresh sources
sudo apt-get update

and install:

# You can skip this first line if these packages were not installed before.
sudo apt-get remove josm josm-plugins

# For the tested version
sudo apt-get install josm
# For the development version
sudo apt-get install josm-latest

GNU Debian

Our own Ubuntu packages, above, work on Debian and we recommend to use them. Depending on the setup of sudo, some instruction will not work as "normal" user but only as root.

Since Debian 11 (bullseye) the ​josm-installer is available under main in section utils. It downloads the current .jar file from this site and updates it if necessary.

The tested version of ​JOSM is available under main in section utils, but the version is usually quite old.
Please, use the ​backports repository to get a more up-to-date version, see ​Instructions. Still this version might be quite old.

openSUSE

The tested version of JOSM is available in the Application:Geo repository.

First add as root user in yast or with zypper the repository (for Tumbleweed replace $releasever with openSUSE_Tumbleweed):

zypper ar -f 'https://download.opensuse.org/repositories/Application:/Geo/$releasever' Application:Geo

Then simply install josm and josm-fonts package.

Troubleshooting

Java

When you double-click on a jar file and nothing happens in most cases this means Java isn't installed.

JOSM was tested with Oracles variant, so we used to recommend getting Java from their pages for ​manual downloads or ​intermediate versions.

JOSM now recommends ​Azul or ​Bellsoft Liberica JDK's. Generally speaking, the current Java LTS should be preferred (at time of writing, that would be Java 17), but Java 8 will work. See the README​ for current recommendations. But first give the Java already distributed with the operating system a try, ​for example.

When choosing a download keep in mind:

• A Java Plug-in for web browsers is not needed to run JOSM. Therefore results from pages like www.java.com/en/download/installed8.jsp are not relevant.
• A Java variant with 64 bit is recommended for JOSM. The operating systems architecture is important for deciding between 32 bit Java or 64 bit Java. Because JOSM is not affected by the web browsers architecture most recommendations on this page www.java.com/en/download/faq/java_win64bit.xml are not relevant.
• Avoid pages like www.java.com/en/download which intent to place Java Plug-ins in web browsers. And this is not important for JOSM.

For further information visit the Installation Notes and ​troubleshooting pages. Java in this section means a JRE (Java Runtime Engine) which provides a JVM (Java Virtual Machine) to run JOSM, a Java program that is developed using JDK (Java Development Kit) and sometimes launched with the JNLP (Java Network Launch Protocol aka Web Start and successor of Java Plug-ins).

Testing Java

Checks if Java is installed and why JOSM does not start (example mainly for MS Windows).

1. Download josm-tested.jar to your desktop.
2. Open a Command Prompt aka Terminal
3. Type cd %homepath%⏎ and type cd Desktop⏎
4. Type java -version ⏎ Three lines with the version data should appear. If you see something else then Java is not properly installed.
5. Type java -jar josm-tested.jar⏎. Now JOSM should run, started from the Command Line (en).
6. Quit JOSM.
7. Type josm-tested.jar⏎. If JOSM starts again, the Windows Explorer is ready for double clicks on jar files.

Web Start

You need to install ​OpenWebStart first. It will download and run Java by itself. The transition from Oracle WebStart to OpenWebStart is still in progress, so in case of issue please create a new ticket or post a comment to #17858.

You may need to update the default application for opening JNLP files if you previously used Oracle WebStart. See ​jnlp file association for instructions on setting OpenWebStart as the default program for jnlp files.

Testing Web Start

1. Download josm.jnlp to your desktop.
2. Open a Terminal and move to the Desktop as above
3. Type javaws josm.jnlp⏎. This should initially download JOSM, show a security dialog and then launch JOSM.
4. If that fails, then type javaws -verbose josm.jnlp⏎. This should first show a dialog with information about the JVM and then launch JOSM.

Virtual Machine

Out of memory

Nowadays manually controlling Javas memory is seldom needed because available RAM on computers has grown. Wrongly chosen values can decrease JOSM performance.

For some tasks, JOSM has a large appetite for memory. On the one hand, it may be necessary to configure a memory size that supports more plugins and features. On the other hand can slow machines be stabilized by restricting Javas memory use. If needed, use the command line (en) to set the ​Java Option -Xmx…m, for example -Xmx512m or -Xmx1536m. In Debian/Ubuntu you can edit the file /etc/default/josm respectively /etc/default/josm-latest.
Formerly older java programs accepted -Xmx=512m or even -Xmx 512m. Now those malformed arguments throw error messages.

VM selection

On current versions of MS Windows by default Java is installed mainly in the C:\Program Files\Java\ directory. Additional parts are placed in C:\Program Files\Oracle\Java\. There is a .\javapath\ directory as target for the PATH environment variable. It is the home for the three virtual files java.exe, javaw.exe and javaws.exe. This files are symbolic links form the current Java installations.

On older versions of 64 bit Windows sometimes the 32 bit mode JRE was additionally installed. Also some browsers brought their own JVM with limited capabilities. In those cases a Web Start from the browser would not use your Java installation but that from the browser.

Check that there's no other javawebstart in \Windows\SysWow64. The Java control panel will not detect it and you can safely delete it. Perform cleanup and only keep the latest versions of each JRE (One or the 32-bit mode, another one for the 64-bit mode).

For shortcuts created on the desktop for JNLP and running the Javawebstart launcher , make sure to pass VM parameters prefixed with -J and no intermediate space before the VM option. If you have installed both the 32-bit and 64-bit version, you should pass the option "-d64" if you want to select the preferred 64-bit VM. Note that some Oracle documentation pages indicate the option "-D64" with the incorrect capitalization!)

Example of an edited command line for a shortcut on the windows desktop:

javaws.exe -J-d64 -J-Xmx2048m  josm.jnlp 

Windows josm.exe

Using josm-setup.exe for installation on Microsoft Windows does the following:

• Puts two executable files JOSM.exe and HWConsole.exe in directory %LOCALAPPDATA%\JOSM
• Registers JOSM.exe as target for the file extensions *.osm, *.geojson, *.gpx, *.jos and *.joz.
• Places JOSM shortcut icons on the Desktop and in the Start Menu.
• Adds uninstall data at the appropriate places.

When starting, JOSM.exe starts JOSM with an embedded version of Java maintained by JOSM developers, based on Azul Zulu. JOSM.exe acts as a wrapper and is portable (en).

HWConsole.exe is similar to JOSM.exe but start JOSM while keeping open a Windows console displaying JOSM standard output (logs).

JOSM.exe accepts all usual JOSM Program arguments (en). See example:

# Load OSM data
josm.exe https://www.osm.org/way/476702262

For giving Java options (en) to the Java VM JOSM.exe uses the configuration file JOSM.cfg in its app sub-directory. In this file each option needs a separate line.

macOS

Using brew

macOS users may use the ​homebrew package manager to install and update their JOSM instance.

In Terminal, run the brew install --cask josm to install or brew upgrade --cask josm to upgrade to the current tested version of JOSM.

Errori noti

Not closed issues about …:

• Java issues - some of the bugs lead to blockers in Oracle JVM (covered at JavaBugs).
• Linux
• Ubuntu
• macOS
• Windows