First of all download the JAR file from the Princeton website, then run the following command (assuming the JAR file is in your Downloads folder): jar ufe /Downloads/algs4.jar TestAlgs4 This command updates the MANIFEST.MF file within the JAR. Once that is done the JAR file should run from the Finder or the Terminal successfully. To download ATLauncher you need to select the correct version. If you are running Windows then you should select the 'Windows (.exe)' button. If you are running a Mac, Linux or prefer to use the jar file, then you should select the 'Linux/Mac/Others (.jar)' button. Latest Minecraft Launcher Jar Download Jar Launcher is the program in Mac OS X that launches Java JAR files into the Aqua/Java runtime environment when the JAR file is double clicked.Jar Launcher also launches a class in the same manner.

To download ATLauncher you need to select the correct version. If you are running Windows then you should select the 'Windows (.exe)' button. If you are running a Mac,Linux or prefer to use the jar file, then you should select the 'Linux/Mac/Others (.jar)' button.
Put the exe/jar file in its own folder somewhere on your computer such as on your desktop or documents folder, making triple sure you place it in it's a new blankfolder.
Once downloaded and placed somewhere it's as simple as opening it like you do any other application. Once ATLauncher is open you can then go to the 'Accounts' tab andenter in your Minecraft Username/Email and Password combination to add your account and start playing packs.
To play a pack just simply navigate to the 'Packs' tab and click 'New Instance' on any of the packs you want to play. Optionally give it a name and pick a version to installand click Install and the process will run through and by the end you will have a working instance which you can play in the 'Instances' tab.
For a more details walkthrough on how to download and install ATLauncher, please watch the Installation Video below. If you have any issues then please feel free to joinour Discord to get some help.
Have you experience some error when trying to open up jar files in your Mac ? or get an error message as “The Java JAR file could not be launched, check the console for possible error messages”. What should be done for this problem?
First, we need to check current java version running on your mac. Mostly current jar file worked with jre version 1.8, so when your jre version are above it lets say 9 or 10 the jar launcher will throw an error message. So how to resolved this problem ?
- Check current running java version
if it throw a result with jre version above 1.8, then we need install another version of java.
Install Multiple Version of Java
A promising solution for installing multiple version of java is to use JEnv a command line tool to set java on the fly.
Homebrew Cask
On Mac, Homebrew is the de-facto package manager, and Homebrew Cask is the app manager. I’m going to use Cask to install Java 7 and 8.
Install Homebrew Cask first if you haven’t:
If your brew or cask is outdated, update and upgrade:
Install Java 8
Unlike other version managers such as NVM, jEnv itself doesn’t install JDKs. You have to do it yourself. Luckily, Homebrew Cask made this task really easy. But before doing that, let’s check if we already have JDK 8 installed by Homebrew Cask:
as we can see there is java8 is not installed yet. Now we will install Java 8:
If you run into permission issue, add sudo
at the beginning of the above command. The JDK will be installed at the following directories. Your JDK’s minor and patch versions might be different.
or alternatively you can check the installed directories using following command :
Java Jar Launcher Download Mac Pro
Install jEnv
Now it is time to install jEnv:
Add the following lines to ~/.bash_profile. This will initialize jEnv.
jEnv doesn’t install JDKs, so we have to tell jEnv where to look for them. Type these commands to register JDKs in jEnv (replace the minor and patch versions with yours):
After that, run this command to list all registered JDKs:
The output will be something like this:
The version with an asterisk is the active version.
In my case, I need to keep JDK 7 as my default version, so I set the global version to 1.7:
Now we have multiple version of java available on our mac.
Alternative Switching Between Java Version
Alternatively for switching between java version, i put the following lines in my .bash_profile which makes it really convenient to switch
after you make change to your .bash_profile, type following code :
I can switch to Java any java version listed by typing the following :
And it’s done. Now you can switch your jre version using jenv or alias command.
Running Your Jar File
To run your .jar file, you can use terminal and type following code :
Thank you for stopping by, i hope it help.
Java Launcher Windows 10
Source : http://davidcai.github.io/blog/posts/install-multiple-jdk-on-mac/
