public class DatabaseConfig { private String url; private String username; private String password; // Getters and setters // toString, hashCode, equals } ObjectMapper objectMapper = new ObjectMapper(new TomlFactory()); DatabaseConfig config = objectMapper.readValue(new File("database.toml"), DatabaseConfig.class); System.out.println(config.getUrl()); config.setUsername("newUsername"); ObjectMapper objectMapper = new ObjectMapper(new TomlFactory()); objectMapper.writeValue(new File("updated_database.toml"), config);