I used Java a lot in college…  But it’s been a while.  I’m trying out NetBeans IDE (for both Java and Python).  Here’s some notes from writing my Java application.

System.out.println(), System.out.print()

Add a .jar library:
1. Right-click the Libraries node and choose "Add JAR/Folder".
2. Browse to and select the .jar file(s).  It didn’t work when I added it as a folder, so i strongly recommend you add each .jar file separately.
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3. Right-click the Libraries node and choose Properties
4. Choose the file you added (for each file), then Edit, then specify the Javadoc and Sources
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5. In your java code, import the package.  The package names should be specified in the java doc.  In my example, this would be (import net.sf.sevenzipjbinding.*;) or (import net.sf.sevenzipjbinding.SevenZip;) etc.

Shift+F11 to build main project.  F6 to run main project.