A friend is having issues with his project. The project is on access control system and he is using JAVA for the programming and netbeans as the development tool for the project. He is trying to import a swing extension package which is (org dot jdesktop dot swingx) but he is getting an error message saying that the package does not exist. How does he go about it? He also wants to add two libraries which are JAVA comm API and JDOM to the projects library but he doesnt knw how. How does he add them?