Programmer Think

Combine learning and rookie notes ~ attach the website about exceptions in the rookie tutorial https://www.runoob.com/java/java-exceptions.html Why should we handle exceptions? When an exception is encountered during the execution of the program (the exception is usually difficult to solve, such as the disconnection exception caused by unplu ...

** 7-1 graphic card sorting game (40 points) ** Master the inheritance of classes, the use of polymorphism and the application of interfaces. See [operation instruction] for details Operation instruction v1.07-2020 0.pdf Input format: First, input a string of numbers (1 ~ 4, integers) on one line, where 1 represents circular card, 2 represe ...

Java basics 02 5. Basic grammar (Part 2) 5.1 procedure flow control Process control statements are statements used to control the execution order of statements in the program. Statements can be combined into small logic modules that can complete certain functions. Its process control mode adopts three basic process structures specified ...

Decorator mode preface I am a junior undergraduate majoring in software engineering. At present, we are preparing for internship and autumn recruitment. The intended position is java back-end development engineer. To this end, I hosted a project in codecloud to sort out all my knowledge. Contents involved: computer network, operating system, ...

1, Agent mode The bottom layer of spring AOP Agent mode classification: Static proxyDynamic agent Benefits of agent mode: It can make the operation of real roles more pure, without paying attention to some public businessesThe public business is handed over to the agent role, which realizes the division of businessWhen the public business ...

Results fill in the blanks (full score 3 points)Results fill in the blanks (full score 5 points)Results fill in the blanks (full score 9 points)Fill in the blank with code (out of 11 points)Fill in the blank with code (Full Score 13 points)Results fill in the blanks (Full Score: 15 points)Results fill in the blanks (Full Score 19 points)Program ...

UDP UDP protocol is an unreliable network protocol. It establishes a Socket object at both ends of the communication, but these two sockets are only the objects to send and receive data. Therefore, for both sides of communication based on UDP protocol, there is no so-called concept of client and server Java provides DatagramSocket class as a ...

IO overview The core of software development is data, and the transmission, storage and reading of data are realized through IO technology. There are three main IO models in Java: BIO synchronous blocking IONIO synchronous non blocking IOAIO asynchronous non blocking IO BIO Blocking IO synchronous blocking IO is a commonly used IO model C ...

Collection data is frequently manipulated in programming. Using Stream in Java8 to process collections, combined with Lambda functional programming, can greatly simplify code. Reasonable use of Stream can improve code readability. On the other hand, since the advent of Java8, the Stream API has been tested by numerous projects, its stability an ...

Singleton mode 1. Overview of singleton mode For some classes of a software system, only one instance is very important. For example, a system can only have one window manager or file system, only one timing tool, etc. How to ensure that a class has only one instance and that the instance is easy to access? Defining a unified global variable ...