error: package org.apache.commons.math.distribution does not exist

I was trying to run a project but unable to run a java file Utility.java. It cannot import the package in the below statement.

import org.apache.commons.math.distribution.*;

Since I have a confusion in which path should be included in cp for executing jar file I tried using the 2 paths commands

root@vidhi-VirtualBox:/home/vidhi/Downloads/explorerChain/explorerchain-master# javac -cp "/Downloads/explorerChain/explorerchain-master/commons-math-1.2/commons-math-1.2.jar" Utility.java


root@vidhi-VirtualBox:/home/vidhi/Downloads/explorerChain/explorerchain-master# javac -cp "/commons-math-1.2/commons-math-1.2.jar" Utility.java

Here is the screenshot of the folders depicting location of files

Screenshot of commons-math-1.2 folder

According to me there is an error in location of the files.
P.S. I am beginner in Java. OS is ubuntu

Follow the below steps to compile and execute your standalone java program.

I suppose your target-directory = /home/vidhi/Downloads/explorerChain/explorerchain-master where you will execute your code.

Copy the jar file commons-math-1.2.jar to location target-directory.

Command : # cp /source-directory/commons-math-1.2.jar target-directory/

Next go to target directory.

Command : # cd <target-directory>

Next Compile your java file. :

Command : # javac -cp commons-math-1.2.jar . Utility.java

Next run your compiled java file :

Command : # java Utility