extra null byte

Basic encryption and decryption problems: Conversion of byte arrays and (hexadecimal) strings, encryption and decryption in hexadecimal format During encryption, encryption algorithms and hash algorithms operate on Byte arrays. These algorithms

One thousand reasons for not using Null, Null Hong Kong, Null seems to be a headache everywhere. For example, NullPointerException, which is a headache in Java, in order to avoid the unexpected Null pointer exception, for thousands of years,

public static void Copyinputstreamt0outputstream (InputStream in, outputstream out) {byte[] buffer = new byte[1024];if (null! = IN) {try {while (true) {int len = 0;if (len = in.read (buffer)) = = =-1) {Out.flush ();Return}Out.write (buffer, 0,

ObjectiveWant to write this article, because before want to write a tool to parse InnoDB ibd file, in the process of writing this tool, found that the logical record to physical record conversion, the most difficult to have two parts, one is each

Believe that a lot of people who have been using MySQL for a long time, the concept of these two field properties is not very clear, the general will have the following questions: My field type is not NULL, why can I insert a null value

About lambda bytecode related articles, very early on wanted to write, through the use of Java8 lambda expression and Rxjava responsive programming framework, so that the code more concise and easy to maintain, more convenient way to call. This

When a field in the database is set to Null, the mobile phone will return Null by default. if I want the mobile phone to return Null, I have to make a judgment. 1. if I want to leave the returned result blank on the mobile phone, I will not make any

Differences between null and not null in mysql and efficiency issues Mysql users may encounter the following situations: 1. My field type is not null. Why can I insert null values? 2. Why is not null more efficient than null? 3. When determining

Mysql explores not null constraints and null values, and mysqlnull Yesterday, a front-end developer suddenly asked me a basic question: "My table columns have the not null constraint. Why can I insert null values? What's more strange is that you can

Believe that a lot of people who have been using MySQL for a long time, the concept of these two field properties is not very clear, the general will have the following questions:1, my field type is not NULL, why I can insert null value2, the