How to run a jar file in a linux commandline

Question

How to set the classpath to the current directory and also run the jar file named load.jar present in the current directory by providing the argument as load=2 from a linux command line.

I did try to run the jar as follows but its executing classes from some other directory.

java -cp ./load.jar:$CLASSPATH load.Start load=2 

Answer 1

Running a from class inside your JAR file load.jar is possible via

java -jar load.jar 

When doing so, you have to define the application entry point. Usually this is done by providing a manifest file that contains the Main-Class tag. For documentation and examples have a look at this page. The argument load=2 can be supplied like in a normal Java applications:

java -jar load.jar load=2 

Having also the current directory contained in the classpath, required to also make use of the Class-Path tag. See here for more information.

Answer 2

For example to execute from terminal (Ubuntu Linux) or even (Windows console) a java file called filex.jar use this command:

java -jar filex.jar

The file will execute in terminal.