#vulnerable code 
                                public static void main(String[] args) throws Throwable {
        KeycloakServerConfig config = new KeycloakServerConfig();

        for (int i = 0; i < args.length; i++) {
            if (args[i].equals("-b")) {
                config.setHost(args[++i]);
            }

            if (args[i].equals("-p")) {
                config.setPort(Integer.valueOf(args[++i]));
            }
        }

        if (System.getProperties().containsKey("resources")) {
            String resources = System.getProperty("resources");
            if (resources == null || resources.equals("")) {
                for (String c : System.getProperty("java.class.path").split(File.pathSeparator)) {
                    if (c.contains(File.separator + "testsuite" + File.separator + "integration")) {
                        config.setResourcesHome(c.replaceFirst("testsuite.integration.*", ""));
                    }
                }
            } else {
                config.setResourcesHome(resources);
            }
        }

        final KeycloakServer keycloak = new KeycloakServer(config);
        keycloak.sysout = true;
        keycloak.start();

        for (int i = 0; i < args.length; i++) {
            if (args[i].equals("-import")) {
                keycloak.importRealm(new FileInputStream(args[++i]));
            }
        }

        if (System.getProperties().containsKey("import")) {
            keycloak.importRealm(new FileInputStream(System.getProperty("import")));
        }

        Runtime.getRuntime().addShutdownHook(new Thread() {
            @Override
            public void run() {
                keycloak.stop();
            }
        });
    } 
                            #location 17 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                public static void main(String[] args) throws Throwable {
        KeycloakServerConfig config = new KeycloakServerConfig();

        for (int i = 0; i < args.length; i++) {
            if (args[i].equals("-b")) {
                config.setHost(args[++i]);
            }

            if (args[i].equals("-p")) {
                config.setPort(Integer.valueOf(args[++i]));
            }
        }

        if (System.getProperties().containsKey("resources")) {
            String resources = System.getProperty("resources");
            if (resources == null || resources.equals("") || resources.equals("true")) {
                if (System.getProperties().containsKey("maven.home")) {
                    resources = System.getProperty("user.dir").replaceFirst("testsuite.integration.*", "");
                } else {
                    for (String c : System.getProperty("java.class.path").split(File.pathSeparator)) {
                        if (c.contains(File.separator + "testsuite" + File.separator + "integration")) {
                            resources = c.replaceFirst("testsuite.integration.*", "");
                        }
                    }
                }
            }

            File dir = new File(resources).getAbsoluteFile();
            if (!dir.isDirectory() || !new File(dir, "admin-ui").isDirectory()) {
                throw new RuntimeException("Invalid resources directory");
            }

            config.setResourcesHome(dir.getAbsolutePath());
        }


        final KeycloakServer keycloak = new KeycloakServer(config);
        keycloak.sysout = true;
        keycloak.start();

        for (int i = 0; i < args.length; i++) {
            if (args[i].equals("-import")) {
                keycloak.importRealm(new FileInputStream(args[++i]));
            }
        }

        if (System.getProperties().containsKey("import")) {
            keycloak.importRealm(new FileInputStream(System.getProperty("import")));
        }

        Runtime.getRuntime().addShutdownHook(new Thread() {
            @Override
            public void run() {
                keycloak.stop();
            }
        });
    }