Compile and Run java program in linux with path to the .java file and path to external jars

Question

Yesterday I solved a problem with an answer here on stackoverflow. But I ended up with another problem, I will try to be clear:

I have a project folder in the /home/demo/Desktop/xlsToCsv/ directory where inside of it is the java file "xlsToCsv.java" and another directory with the external jars that I need in /home/demo/Desktop/xlsToCsv/jars.

Now I need to compile and run my program. Yesterday I ran a command that assumed that I was already inside of /home/demo/Desktop/xlsToCsv/, and the commands were:

javac -cp ".:./jars/*" xlsToCsv.java

java -cp ".:./jars/*" xlsToCsv

The problem was solved and I was able to run my program without any problems. But, my program was supposed to run from the root directory, ie, the directory where it is when I open the linux terminal without the need to make a "cd" command.

So, when I open the terminal the path to the .java file is:

/home/demo/Desktop/xlsToCsv/

And the path to jars folder is:

/home/demo/Desktop/xlsToCsv/jars/*

Can someone explain to me what I have to do, and the reason so? Because more that run the program, I want to know the reasons and understand the classpath mechanism in java.

Mr. D · Accepted Answer · 2016-02-11T16:11:25.933

1

Avoid using relative classpath. and instread of "./jars/" use the absolute path "/home/demo/Desktop/xlsToCsv/jars/"

EDIT:

javac -cp "/home/demo/Desktop/xlsToCsv/jars/*" /home/demo/Desktop/xlsToCsv/xlsToCsv.java

java -cp "/home/demo/Desktop/xlsToCsv/:/home/demo/Desktop/xlsToCsv/jars/*" xlsToCsv

edited Feb 11 '16 at 16:11

answered Feb 11 '16 at 14:07

Mr. D

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So, for you, what has to be the full commands? For compile and run. Understanding that the path to the file is at /home/demo/Desktop/xlsToCsv/xlsToCsv.java – Alexandre Silva Feb 11 '16 at 14:32
It's working now, I will put in two comments the command that I used to compile and run the file. – Alexandre Silva Feb 11 '16 at 16:07
**Compile -->** javac -cp "/home/demo/Desktop/xls_to_csv/jars/*" /home/demo/Desktop/xls_to_csv/xlsToCsv.java – Alexandre Silva Feb 11 '16 at 16:08
**Run -->** java -cp "/home/demo/Desktop/xls_to_csv/:/home/demo/Desktop/xls_to_csv/jars/*" xlsToCsv – Alexandre Silva Feb 11 '16 at 16:09
yes I forgot to include the classpath for the directory – Mr. D Feb 11 '16 at 16:13
Thank you. While I tried your option I read an article about classpath in java, may be it will be usefull to someone in the future: http://kevinboone.net/classpath.html – Alexandre Silva Feb 11 '16 at 16:19

Compile and Run java program in linux with path to the .java file and path to external jars

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