How to run a jar file in Eclipse

You cannot directly execute a jar file. Instead, you need to run it using the java -jar command. In order to do that you:

1. Go to Run > External Tools > External tools Configurations
2. Create an item under "Program"

3. Fill in:

   Location: /usr/bin/java (or the route to your java executable, in Linux you can find this by running which java on a terminal, in Windows you can use where java in command prompt)

   Working directory: The working directory for your jar program (usually its location)

   Arguments: -jar [path to your jar]

You could run the JAR with an "External Tool" launch configuration, found at Run > External Tools > External tools Configurations.

Run -> External Tools -> External Tools Configuration.

Program -> New