disadvantages of iptv

on index, which can return an object of the subclass of the class *@paramIndex *@return */ Public StaticFather newinstance (intindex) { Switch(index) { Case1: return NewSon1 (); Case2: return NewSon2 (); default: return NewFather (); } } }/*** Son1 class * Inherit Father *@authorXujianguo*/classSon1extendsFather { Public voidsay () {System.out.println ("Son1 say"); }}/*** Son2 class * Inherit Father *@author */classSon2extendsFather { Public

it will be saved separately according to the account. Cookie restrictions A Cookie occupies a basic space overhead of about 50 characters (used to save the validity period information, etc.). In addition, the length of the saved value is close to 4 K. Most browsers only allow 20 cookies to be saved on each site.Why save the information to the cookie? There are two solutions: 1. most servers use the session replication method: when the session value is changed, copy it to another machine

In the financial service industry, a controversial topic in the field of security and rule compliance is "encryption technology stores data and the encryption of transmitted data) and the confrontation between marking technology ". Because Rules comply with requirements such as the Payment Card Industry Data Security Standard pci dss) and FFIEC information security inspection requirements include requirements for encryption and data protection, enterprises are trying to find the best way to prot

Advantages and disadvantages of a responsive website Advantages: I. Reduce workload 1. Only one copy of the website, design, code, and content is required. 2. The extra work is only a JS script and CSS style change. 2. Save time. In the Internet field, time is the most important. Sometimes when a project is released late, it will lose the market. 3. Each device can be properly designed. Different devices on the market, or even new devices in the

stable in high-traffic environments.6. nginx is now becoming more and more mature as the Web reverse acceleration cache, which is faster than the traditional squid server. You can consider using nginx as the reverse proxy accelerator.7. nginx can be used as a middle-layer reverse proxy. nginx basically has no rivals on this layer. The only thing that can be compared with nginx is Lighttpd. However, Lighttpd does not yet provide complete nginx functions, the configuration is not so clear and eas

many years, I once again met this ugly-looking colleague on the Internet and asked him how to win the game. His answer to my question is: the leaders get our conclusion and will almost only look at our "disadvantages". The advantages of most leaders will only take over or not at all. In fact, the advantages of many of my colleagues are complicated, and the disadvantages are short or blank. Question: If you

Go to: performance, advantages and disadvantages of common collection classes We willArray, Dictionary And their respective advantages and disadvantages? One-dimensional arrayIt is a linear table with the highest efficiency compared to other collection classes, but it is also relatively inconvenient to use; Dictionary It is a two-dimensional dictionary table based on the hash algorithm. Because the hash al

Document directory Disadvantages of storing BLOB data in Databases Write BLOB data to the database Reading BLOB data from a database Disadvantages of storing BLOB data in Databases Consider which resources may be better stored in the file system than in the database. The image referenced through HTTP href is a good example. This is because: • Retrieving images from a database results in hig

Advantages and disadvantages of blocking and non-blocking Io packages in Java The cornerstone behind NiO design: the reactor model, which is used for event Multi-Channel Separation and dispatching of the architecture model. Reactor: an architecture pattern used for event Multi-Channel Separation and allocation Generally, a file or device specified by a file descriptor can work in two ways: blocking and non-blocking. Blocking means that when you try to

minimized in the case of accidental drops of a laptop or collisions with hard objects. 8. Wider operating temperature range. A typical hard drive can only work between 5 and 55 degrees Celsius. Most SSDS can be in-10 ~ Working at 70 degrees Celsius, some industrial solid state disks are available at-40 ~ 85 degrees Celsius, or even a larger temperature range. 9. Low-capacity SSDs are smaller and lighter than hard drives of the same capacity. However, this advantage gradually decreases as the ca

B/S and C/S software architecture. 　　B/SYesBrowser/ServerIt refers to the browser and server. No special software is installed on the client. You only need one browser (thin client) 　　C/SYesClient/ServerThe client and server can access the server (fat client) only after the client software and corresponding environment are installed on the client) Comparison of advantages and disadvantages of B/S and C/S: 1)C/S(Simplest: it can reduce the pressure on

In many cases, int char bit set Enum can be replaced. The advantages and disadvantages of these types are described below. Take the gender field used to create a user table in the database as an example. What are the advantages and disadvantages of the following types? 1. INT: Gender tinyint unsigned not null The advantage of defining gender columns is that the storage space is small (1 byte) and the scalab

I. Why should I create an index (advantage )?This is because creating an index can greatly improve the system performance.First, you can create a unique index to ensure the uniqueness of each row of data in the database table.Second, it can greatly speed up data retrieval, which is also the main reason for creating an index.Third, it can accelerate the connection between tables, especially in achieving Data Reference integrity.Fourth, when you use grouping and sorting clauses to retrieve data, y

) { /* Apply the style when the width is less than 480 */ ...... } Other common CSS attributes are placed outside. Method 2: Specify different css in the When the browser width is less than px, mobile.css will be used, otherwise the previous one will be used. Description ScreenIs one of the media types. css2.1 defines 10 media types. AndIt is called a keyword. Other keywords includeNot(Exclude a device ),Only(Specify a device) (Min-width: 400px)Is the media fea

Usage and advantages and disadvantages of anonymous functions in JavaScript Anonymous functions can effectively write Javascript on the page without causing global variable pollution. This is very effective and elegant when adding Javascript to a page that is not very familiar. 1. What is an anonymous function? There are three methods to define a function in Javascript: Function keyword statement: Function fnMethodName (x) {alert (x );} Function Liter

Advantages and disadvantages of JSP 　Disadvantages: 1. JSP technology greatly increases product complexity. to obtain the system's cross-platform Functions and product scaling capabilities, java has developed a variety of products, such as JRE, JDK, J2EE, EJB, JSWDK, and JavaBeans, only by effectively combining them can powerful functions be produced. (deployment is difficult) 2. java's efficient operatio

The following articles mainly introduce the disadvantages of MySQL indexes and the actual operations of MySQL indexes, which deserves our attention, we may not know that using indexes too much will cause abuse. Therefore, MySQL indexes also have their disadvantages:Although the index greatly improves the query speed, it also reduces the speed of updating the table, such as performing INSERT, UPDATE, and DELETE operations on the table. When updating a

Advantages and disadvantages of Linux Device Driver dynamic kernel insertion and direct integration into the Kernel Analysis Introduction: The company made a Linux-based Ethernet interface board, which is currently maintained by me, the main CPU of this Board uses PowerPC, run the Linux system and add two external DPRAM modules. DPRAM is written in the form of a character device driver. It is directly integrated into the kernel source code and compile

Design Mode: Three creation modes of Singleton mode and their respective advantages and disadvantages Singleton mode: ensures that a class has only one instance and provides global access points. The implementation of Singleton mode in Java requires a private constructor, a static method, and a static variable. Determine the performance and resource restrictions, and how to select an appropriate solution to implement Singleton to solve the problem of

With the development of the times, the network is becoming more and more popular, especially the performance of PC is getting stronger and stronger. Now the hard disk of PC is getting bigger and bigger, so we can install more operating systems in our own computer, as a result, many people have installed Linux. The most commonly used multi-Start Software in Linux is LILO and Grub. Here we will explain the advantages and disadvantages of Grub and LILO.