Programmer Group

2021SC@SDUSC IncludeTransformer.java (Part 2) In this blog, I will continue to analyze the two internal classes class IncludeElement and class IncludeXMLPipe in IncludeTransformer.java. class IncludeElement 1. Properties: //Parameter control includes recursive processing. private boolean recursive; //Parameter control parallelism (in m ...

catalogue   1, Concept 1. Program, process, thread 2, Creation and use of threads 1. By inheriting the Thread class 2. By implementing the Runnable interface: 3. Related methods in Thread class 4. Thread priority 3, Thread life cycle   1. Several states of threads 4, Thread synchronization   1. Synchronous code block ...

Responsibility chain model Business requirements: OA system procurement approval requirements (Procurement approval items of school OA system): Purchaser purchases teaching equipmentIf the amount is less than 5000, it shall be approved by the Dean [0 < = x < = 5000]If the amount is less than 10000, it shall be approved by the presiden ...

1. Is java value passing or reference passing?   This is a controversial but not controversial question. If you ask, you can answer that it is value transmission. Let's learn about parameter passing in Java   2. What is value passing and reference passing? Value transfer: Value passing refers to copying and passing a copy of the actu ...

What are atomic classes and what are their functions? inseparableAn operation is non interruptible and can be guaranteed even in the case of multithreadingjava.util.concurrent.atomicAtomic classes are similar to locks to ensure thread safety in concurrency. However, atomic classes have some advantages over locksFiner granularity: atomic variab ...

Concept and definition of FSTThe 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 is incre ...

1, Problem description Problem Description: the n queen problem studies how to place n queens in n × N's chessboard, and the Queens can't attack each other. Give you an integer n and return the solution of all different N Queen problems. Each solution contains a different chess placement scheme for the n-queen problem, in which 'Q' a ...

1, Timer timer basic usage Timer timer = new Timer(); timer.schedule(TimerTask, Date);， The task needs to be encapsulated with TimerTask, and the run method in TimerTask is rewrittenTimer timer = new Timer(boolean);， Passing a value of true indicates that the timer thread is a daemon thread, and the end of the main thread follows the end. Th ...

🍉 Linear table A linear list is a finite sequence of n data elements with the same characteristics. Linear table is a data structure widely used in practice. Common linear tables: sequential table, linked list, stack, queue, string A linear table is logically a linear structure, that is, a continuous straight line. However, the physi ...

2021SC@SDUSC preface In the initial use of the previous blog netty, we simply wrote the code between the client and the server to realize two-way communication. This time, we made some improvements on the basis of the last code and preliminarily realized the function of chat room. 1, Server 1,Server The Server class itself has not chang ...