Programmer Group

preface String string is a data structure that appears very frequently in our development. I have prepared several small questions here. Whether you are a beginner or an expert, you can try whether you can easily solve the following questions. If you have better solutions, you are welcome to communicate in the comments! How to invert a string ...

Concept and definition of FST The full name of FST serialization is Fast Serialization Tool, which is an alternative implementation of Java serialization. Since the two serious shortcomings of Java serialization mentioned above have been greatly improved in FST, the characteristics of FST are as follows: The serialization provided by JDK i ...

1. Description The Web service task is used to synchronously invoke external Web services. 2. Graphical representation Web service tasks are visualized in the same way as Java service tasks. 3. XML representation To use a Web service, we need to import its operations and complex types. This can be done automatically by using the import ta ...

Recently, the business has grown rapidly, which is also a big challenge for our background. The performance bottleneck of the core business interface encountered this time is not caused by a single problem, but a combination of several problems: after we solve one, we launch it, and then we find another performance bottleneck. This is also my l ...

Today, I'd like to share with you the interview process of a friend who went to today's headlines (a junior undergraduate student who is currently interning in meituan). The following is his journey, which is divided into six links: If you want to climb the peak, don't use the rainbow as a ladder. 1. Self introduction After a brief ...

1, Overview Let's take a look at this comment in the source code. Let's try to extract some information from it: /** * Doubly-linked list implementation of the {@code List} and {@code Deque} * interfaces. Implements all optional list operations, and permits all * elements (including {@code null}). * * <p>All of the operations perf ...

Title: give two one-dimensional int arrays a and B. where: A is an ordered array with length m and elements in good order from small to large. B is an ordered array with length n and elements arranged from small to large. We hope to find the maximum k numbers from the A and B arrays. It is required to use as few comparisons as possible. Soluti ...

preface Complete the introduction to Java exceptions first , and then complete Java advanced. 1, Automatically close resources The JVM does not recycle hardware resources (such as I/O resources). That is what the OS does. The JVM will recycle the resources occupied by objects in heap memory. When IOException occurs in the I/O flo ...

preface In the previous chapter, I took you to build the CAS Server side project, that is, we built a unified single sign on authentication center. Next, we can build the CAS client project, and then realize the interactive authentication between the client and the server, so as to complete single sign on. Next, you will follow brother Yige t ...

Basic support layer The basic support layer is located at the bottom of the overall architecture of MyBatis, supports the core processing layer of MyBatis, and is the cornerstone of the whole framework. Several general and independent modules are encapsulated in the basic support layer. It not only provides basic support for MyBatis, but also ...