Programmer Think

1. Assemble A collection is a container similar to an array, but its storage capacity is variable. Array features: After the array definition is completed, the type is determined and the length is fixed.It is suitable for the scenario of determining the number and type of data.Existing problems: when the number is uncertain and th ...

Java memory structure 1. Program Counter Register Function: remember the execution address of the next jvm instruction For example, when executing instruction 0, the program counter will remember 3. When the execution of 0 is completed, the interpreter will take the instruction of 3 from the program counter, and so on. The instruction is i ...

preface The notes are based on black horse's Netty teaching handout and some of my own understanding. I feel that this is a very good video I've seen. There's basically no nonsense. Video address: Black horse Netty . From here on, we try to look at the source code to understand the underlying operating mechanism of Netty. 1. nio star ...

Alibaba Java development manual mentioned that "in order to avoid precision loss, BigDecimal can be used for floating-point operation". In this article, I will briefly explain the reasons for the loss of precision in floating-point operation and the common usage of BigDecimal. I hope it will be helpful to you! BigDecimal introductio ...

catalogue go language pointer Address: Define pointer: Use pointer: Null pointer: go language structure Define structure Access structure members Structure as function parameter Structure pointer go language recursive function Factorial: Fibonacci sequence: go language type conversion go language interface Relationship between ...

catalogue catalogue Basic thread management Start thread Wait for the thread to complete Running threads in the background Pass parameters to thread function Pass a parameter Value transmission Pass reference Pass pointer Pass multiple parameters Transfer ownership of threads Select the number of threads at run time result Iden ...

1 Spring 1.1 INTRODUCTION SpringSSH: Strust2 + Spring + HibernateSSM: SpringMvc + Spring + Mybatis Official website: https://docs.spring.io/spring-framework/docs/current/reference/html/overview.html#overview GitHub: https://github.com/spring-projects/spring-framework/releases <!-- https://mvnrepository.com/artifact/org.springframework/ ...

Control statement: combine the statements into small logic modules that can complete certain functions. Divided into 1 Sequential statement 2 Select statement 3 Loop statement. In fact, any software and program, from an exercise to an operating system, is essentially composed of "selection statements and circular statements". In cpp, ...

preface Recently, many friends have always asked me privately, what is ThreadLocal So today we'll focus on ThreadLocal. If you think it's good after reading it, don't forget to praise it! text ThreadLocal is mainly used to provide thread local variables, that is, this variable is only visible to the current thread. ThreadLocal maintains a ...

python foundation 6: files 1, File operation 1. [know] the role of documents The role of files: persistent storage of data 2. [key] basic operation of documents Document operation process Open a file or create a new oneRead / write dataClose file Open file: file variable = open("file name", "access mode")Closing ...