Programmer Think

Routine introduction Routine selection: Selection criteria: The level of peripherals after Dio opens is shown in the following figure: Siul2 opens the peripheral hierarchy as shown in Fig. Use of GPIO General GPIO Pin level control requires the following modules to be added to the diver: Increase GPIO Clicking on the SIUL2 module ...

catalogue 1, Package 1. Function of package: 2. How to declare a package? 3. How to compile packaged classes 4. How to run a packaged class 5. How to use the class of another package? 2, eclipse overview and basic interface 1. Installation steps 2. New project 3, Using eclipse: colors and fonts 4, Using eclipse: running and charact ...

Topic 1: definition and application of method Training points: Properties of class Class method Requirement description Write telephone cards Implementation idea: 1. Define mobile card 2. Define its attributes and methods public class MobileCard { public String num;//Card number public String name;//user name public String password;//pass ...

Single column collection ArrayList Variable array, default capacity 10. Automatically move the following elements after inserting them Not thread safe Vector The main difference from ArrayList is that the thread of Vector is safe, and other usage methods are consistent with ArrayList LinkedList The bottom layer is realized by two-way lin ...

I Mail protocol: Sending and receiving mail has the same mail transmission protocol as HTTP protocol SMTP: (Simple Mail Transfer Protocol) POP3: (Post Office Protocol Version 3) mail receiving protocol IMAP: (Internet Message Access Protocol) II Mail sending and receiving diagram 1. Send mail to the same mail server (163 mailbox example): ...

1, Program, process and multitasking A program is a collection of codes that describe and operate data. It is a script executed by an application program. Process is an execution process of a program and the basic unit for the system to run the program. The program is static and the process is dynamic. A system running a program is a process ...

Topic 1: application of inheritance Define Pet, Cat and Dog 1. Pets have attribute name s and ages 2. Pets have ways to eat, drink and shout 3. Cats have a way to climb trees 4. Dogs have police methods //Pets public class Pet { public String name; public int age; public void eat(){ System.out.println(name+"Can eat"); } public void d ...

catalogue 1, Insert class sort 1. Insert sort2. Hill sortComplexity analysis2, Exchange class sorting 3. Bubble sorting4. Quick sortComplexity analysis3, Select sort 5. Simple selection and sorting6. Heap sortingComplexity analysis4, Other internal sorting 7. Merge and sort8. Cardinality sortingComplexity analysisReference article: ...

Factory mode First, let's look at the traditional design pattern Now there is a demand: the production of Xiaomi mobile phones Mobile interface //Mobile interface public interface Phone { void make(); } Xiaomi mobile phone //Xiaomi mobile phone public class MiPhone implements Phone { public MiPhone() { this.make(); } ...

Stream It is used to perform various operations and operations on the data in the collection, such as filtering, sorting, mapping... Finally get the result The collection focuses on the storage of data, and the Stream stream focuses on the operation and operation of the data stored in the collection Use steps Gets the object of a Stream s ...