List Library of project programmatically

Hello, after manny hours snd searchs i make a kind of solution:

import org.netbeans.api.project.Project;

Project[] openProject

for (Project project : openProject) {
    FileObject projectDir = project.getProjectDirectory();
    String projectLocation = projectDir.getPath();
    //
    ArrayList<String> jarPathList = new ArrayList<>();
    projectLocation += File.separator + "nbproject" + File.separator + "project.properties";
    if (new File(projectLocation).exists()) {
       FileInputStream fstream = new FileInputStream(projectLocation);
       try (BufferedReader br = new BufferedReader(new InputStreamReader(fstream))) {
                        String strLine;
                        while ((strLine = br.readLine()) != null) {
                            if (strLine.contains("file.reference.") && !strLine.contains("$")) {
                                if (!jarPathList.contains(strLine.substring(strLine.indexOf("=") + 1))) {
                                    jarPathList.add(strLine.substring(strLine.indexOf("=") + 1));
                                }
                            }
                        }
                    }
    }
    //
    for (String jarPath : jarPathList) {
        JarFile jarFile = new JarFile(jarPath);
        Enumeration allEntries = jarFile.entries();
        while (allEntries.hasMoreElements()) {
            JarEntry entry = (JarEntry) allEntries.nextElement();
            String name = entry.getName();  
            if (!entry.isDirectory() && name.endsWith(".class") && !name.contains("$")) {
                System.out.println(name);
            } 
        }
    }
}