Programmer Think

catalogue Lamda expression: Why use Lambda expressions Static agency mode: (wedding company) Thread status: Stop thread: Thread sleep: Thread yield: Thread join: Thread state observation: Thread priority: Daemon thread Thread synchronization: Deadlock: Lamda expression: Understanding the functional interface is the key to lear ...

1.maven warehouse <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> 2. Filter The ...

I wrote the script of Oracle scheduled task before. At that time, the script was added to the task plan for the Windows server server, but I encountered that the script could not be added to the task plan in practice (I tried all kinds of methods but could not be added). This is what I thought. Can I write a scheduled task to call the script? Y ...

07 Service I Related concepts of thread Program: a set of instructions (a set of static code) written in a language to complete a specific taskProcess: the running program is an independent unit of system scheduling and resource allocation. The operating system will allocate a section of memory space for each process! The dynamic execut ...

1. Foreword There is a scenario where we need to read the attribute value from the configuration file and inject it into the java class. Should this class be new only once in the whole system! Think about what design patterns can be realized!! What is singleton mode Singleton mode: its essence is to control the number of instances. Mandarin ...

1. Preface This function is completely based on Java language and its related computing toolkit, and has been applied to practice. As we all know, when we need to analyze the signal, we basically use the Fourier change function, but based on the Java platform, there is a lack of relevant Fourier function, or although there are packages in some ...

Refer to Niuke advanced project tutorial 1. Write Kaptcha configuration class Environmental preparation Import kaptcha package. Since there is no package related to spring, you need to configure it into spring <!-- Registration code configuration--> <dependency> <groupId>com.github.penggle</groupId> ...

Title Description This topic is code completion. Please complete the source code given in the topic and copy it to the code box on the right. Select the corresponding compilation language (C/Java) and submit it. If the source code language given in the title is not unique, you only need to select one to complete and submit. After copying, dele ...

1.Zookeeper learning notes 1.1 overview Zookeeper is an open source distributed Apache project that provides coordination services for distributed frameworks. Zookeeper's working mechanism: From the perspective of design pattern: it is a distributed service management framework designed based on observer pattern. It is responsible for stori ...

0 @WebServlet annotation usage 0.1 configuration xml document header Note: if the annotation is "0-version", please note that the configuration is "version-3" <?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instanc ...