Getting Started
To test that Java is installed and working properly on your computer, run this test applet. Install Java on Mac. Download the jre-8u65-macosx-x64.pkg file. Review and agree to the terms of the license agreement before downloading the file. Double-click the.pkg file to launch it; Double-click on the package icon to launch install Wizard.
In addition to the I2P download, you need to install Java if you do not have it already installed. I2P requires Java Runtime Version 7 or higher.(Oracle,OpenJDK, orIcedTeaJava Version 7 or 8 recommended,except Raspberry Pi: OpenJDK 9 for ARM,PowerPC: IBM Java SE 7 or 8)
Determine your installed Java version hereor type java -version at your command prompt.
Windows: Java 8 is recommended. Java 9 or higher may not work.
Download Java for OS X directly from Oracle. Get the latest version If an app or webpage you want to use asks you to install Java software, you can download the current version of Java for OS X directly from Oracle's website. Java 2 Micro Edition emulator that works right out of the box The MicroEmulator user interface simulates the design of a mobile device, while the top menus provide access to most functionalities: you get to open or close MIDlet files or URLs, to save them for the web, or to view the recently tested projects.
Java Virtual Machine - Download free. Review; Download for Windows 10. With JRE (Java Runtime Environment) as well as be able to view web pages that make use of Java, you can run all those applications that have been developed in the Java. Download OS X Lion for Mac free. Important Note: OS X 10.7 Lion has been replaced by OS X 10.8 Mountain Lion.
Release Notes
Pick your I2P Bundle
When you download the I2P software bundle, you get everything you need to connectand start participating in the I2P network and community. It even includes basicapplications for every user, like e-mail, bittorrent, and a basic I2P site foryou to personalize and share.
After you've installed, a set up wizard will help you configure a fewimportant things like how much bandwidth you would like to share while yourrouter begins to make connections to the network. After the set up wizard iscomplete, you will be directed to the console home page where you can accessthe rest of the applications or configure, monitor, or troubleshoot yourI2P connections.
Download the file and double-click to run it.
The most reliable way to launch the installer is from a terminal like this: java -jar i2pinstall_0.9.47.jar. This will launch the GUI installer. Depending on how your computer is set up, you may be able to start the installer by double-clicking the 'i2pinstall_0.9.47.jar' file or right-clicking the file and selecting 'Open with Java'. Unfortunately, this behaviour is difficult to predict.
Command line (headless) install:
I2P can also be installed in a terminal environment, which may be especially useful for servers, containers, or certain virtual machines. If you wish to use the installer without a GUI, you can use the commandjava -jar i2pinstall_0.9.47.jar -console to follow the install procedure in your terminal. 
This is a more familiar drag-and-drop style installer for OSX, which includes a Dock icon to easily inform you of I2P's status. Beta.
Double-click on the file, then drag and drop the launcher into your Applications folder.
The most reliable way to launch the installer is from a terminal like this: java -jar i2pinstall_0.9.47.jar. This will launch the GUI installer. Depending on how your computer is set up, you may be able to start the installer by double-clicking the 'i2pinstall_0.9.47.jar' file or right-clicking the file and selecting 'Open with Java'. Unfortunately, this behaviour is difficult to predict.
Command line (headless) install:
I2P can also be installed in a terminal environment, which may be especially useful for servers, containers, or certain virtual machines. If you wish to use the installer without a GUI, you can use the commandjava -jar i2pinstall_0.9.47.jar -console to follow the install procedure in your terminal. 
I2P is available in the official repositories for Ubuntu Bionic and later, and Debian Buster and Sid. However, Debian Buster and Ubuntu Bionic (LTS) distributions will have older I2P versions. If you are not running Debian Sid or the latest Ubuntu release, use our Debian repo or Launchpad PPA to ensure you're running the latest I2P version.
Download Java For Mac Os
I2P is now available as a Docker package from the Docker Hub. You may retrieve the image by running the 'docker pull' command.
Docker HubAlternately, you can fetch the source from monotone or via Git from git.repo.i2p or Github.
Run (tar xjvf i2psource_0.9.47.tar.bz2 ; cd i2p-0.9.47 ; ant pkg) then either run the GUI installer or headless install as above.
Android source is in monotone and on Github. Android builds require the I2P source. See the documentation in the Android source for additional build requirements and instructions.
The files are signed by zzz,whose key is here.The Windows installer is signed by zlatinb,whose key is here.The Mac OS X native installer is signed by mikalv (meeh) with his Apple Developer ID certificate,whose key is here.Updates from earlier releases:
Both automatic and manual upgrades are available for the release.
If you are running 0.7.5 or later, your router should detect thenew release. To upgrade simply click the 'Download Update' button on your router consolewhen it appears.
Since 0.9.23, some releases are signed by str4d, whose signing key has been in the routersince 0.9.9. Routers older than 0.9.9 will fail to verify update files signed by str4d,and will need to be manually updated using the process below.
- Download the file to your I2P installation directory and rename as i2pupdate.zip. (alternately, you can get the source as above and run 'ant updater', then copy the resulting i2pupdate.zip to your I2P installation directory). You do NOT need to unzip the file.
- Click 'Restart'
- Grab a cup of coffee and come back in 11 minutes