How to import package in netbeans?

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Java

cloud

netbeans

I'm working on CloudSim project in NetBeans IDE and I need to import

org.apache.common

into my project.

I have followed youtube to install Java jdk and NetBeans on my windows 10. Then I followed steps below to add CloudSim project to NetBeans:
1. file -> new project -> Java with Ant -> Java Project with Existing Source
2. defined name and folder for project, the path is: `\CloudSim_Tutorial`
3. to add existing source I added CloudSim folder as my source
4. finish

The project throw an error that:

Package org.apache.common.math3.linear does not exist

for some java files. So I searched on the web and did the following:
1. download commons-math3-3.2-bin binary file
2. extracted the zip file in my project folder, `\CloudSim_Tutorial`
3. right click on project name -> properties
4. selected Libraries from pop-up window
5. in `classPath` clicked on `+` sign
6. selected the `commons-math3-3.2.jar` file -> Ok

It still throw the error.

The code causing error:

import org.apache.commons.math3.linear.Array2DRowRealMatrix;

Error:

Package org.apache.commons.math3.linear does not exist.

What I have tried:

I have see many tutorials but I couldn't make it.