#vulnerable code 
                                static void copyResources(URL resourceUrl, File targetPath) throws IOException, URISyntaxException {
        if (resourceUrl == null) {
            return;
        }

        URLConnection urlConnection = resourceUrl.openConnection();

        /**
         * Copy resources either from inside jar or from project folder.
         */
        if (urlConnection instanceof JarURLConnection) {
            copyJarResourceToPath((JarURLConnection) urlConnection, targetPath);
        } else if (VFS_PROTOCOL.equals(resourceUrl.getProtocol())) {
            VirtualFile virtualFileOrFolder = VFS.getChild(resourceUrl.toURI());
            copyFromWarToFolder(virtualFileOrFolder, targetPath);
        } else {
            File file = new File(resourceUrl.getPath());
            if (file.isDirectory()) {
                for (File resourceFile : file.listFiles()) {
                    File targetFile = new File(targetPath, resourceFile.getName());
                    if (!targetFile.exists() || targetFile.length() != resourceFile.length()) {
                        FileUtils.copyFile(resourceFile, targetFile);
                    }
                }
            } else {
                FileUtils.copyFile(file, targetPath);
            }
        }
    } 
                            #location 19 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                static void copyResources(URL resourceUrl, File targetPath) throws IOException, URISyntaxException {
        if (resourceUrl == null) {
            return;
        }

        URLConnection urlConnection = resourceUrl.openConnection();

        /**
         * Copy resources either from inside jar or from project folder.
         */
        if (urlConnection instanceof JarURLConnection) {
            copyJarResourceToPath((JarURLConnection) urlConnection, targetPath);
        } else if (VFS_PROTOCOL.equals(resourceUrl.getProtocol())) {
            VirtualFile virtualFileOrFolder = VFS.getChild(resourceUrl.toURI());
            copyFromWarToFolder(virtualFileOrFolder, targetPath);
        } else {
            File file = new File(resourceUrl.getPath());
            if (file.isDirectory()) {
                for (File resourceFile : FileUtils.listFiles(file, null, true)) {
                    File targetFile = new File(targetPath, resourceFile.getName());
                    if (!targetFile.exists() || targetFile.length() != resourceFile.length()) {
                        if (resourceFile.isFile()) {
                            FileUtils.copyFile(resourceFile, targetFile);
                        }
                    }
                }
            } else {
                if (!targetPath.exists() || targetPath.length() != file.length()) {
                    FileUtils.copyFile(file, targetPath);
                }
            }
        }
    }