java读取properties文件

String IP_ADDR = null;        int PORT;        Properties prop = new Properties();        //读取属性文件tcp.properties        InputStream in = getClass().getResourceAsStream("tcp.properties");        prop.load(in);     ///加载属性列表        IP_ADDR = prop.getProperty("IP_ADDR");        PORT = Integer.valueOf(prop.getProperty("PORT"));