如何在 Linux 命令行中运行 jar 文件

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.

Answer 3

Under linux there's a package called binfmt-support that allows you to run directly your jar without typing java -jar :

sudo apt-get install binfmt-support
chmod u+x my-jar.jar
./my-jar.jar # there you go!

Answer 4

For OpenSuse Linux, One can simply install the java-binfmt package in the zypper repository as shown below:

sudo zypper in java-binfmt-misc
chmod 755 file.jar
./file.jar

Answer 5

In my case I had to utilize an additional flag- console to get it up and running:

java -jar jarfilename.jar -console

The console flag was needed to run the file in shell and do instructions needed for setup like installation path and accept terms and conditions.

Answer 6

sudo -sH
java -jar filename.jar

Keep in mind to never run executable file in as root.

Answer 7

copy your file in linux Java directory

cp yourfile.jar /java/bin

open the directory

cd /java/bin

and execute your file

./java -jar yourfile.jar

or all in one try this command:

/java/bin/java -jar jarfilefolder/jarfile.jar