Preface
Brother Ba hasn't appeared for a long time! Brother Ba is really busy recently, and the company projects one after another. Thank you all for your continued attention.
This has just entered August, and I have seen many friends anxiously preparing for the "Golden Nine and Silver Ten" job interviews, and even many college graduates who are about to graduate are preparing for the autumn recruitment. For college students with good academic qualifications, this is a departure. Dachang’s recent opportunity, after all, is a fresh graduate, and does not have very strict requirements on technology.
For friends who have worked for one or two years, strengthening their technical capabilities during this period of time and mastering some core Java technologies is the top priority.
According to Ba Ge’s years of interview experience, the most important and fastest Java development technologies are nothing more than those:
- Java basics: annotation, reflection, exception, serialization, collection, etc.
- JVM
- Multithreading
- SSM framework
- Design Patterns
- algorithm
- database
- The internet
Java entry and advanced core technology
Here I first talk about the technology stack that programmers of various years need to master:
- 0~1 years in the pit (moving bricks and code farmers): Java foundation + multithreading foundation + JVM foundation + part of development tools + SSM framework construction + network + algorithm and data structure + learning ability;
- 2~3 years in the pit (development engineer): concurrent programming + JVM + framework source code + design pattern + MySQL tuning + familiarity with the use and configuration of Redis, messaging, Nginx, Zookeeper, and microservices + actual project experience ;
- 4~5 years in the pit (preliminary architect): JVM tuning + source code underlying mechanisms and principles + in-depth distribution, caching, messaging, microservices + solving distributed scenarios + high concurrency actual project experience + certain project management, team Management experience ;
XMIND
1. Java foundation: JAVA exception classification and processing, JAVA reflection, JAVA annotation, JAVA internal classes, JAVA generics, JAVA serialization (creating reusable Java objects), JAVA replication, etc.
2. JVM: Thread, memory area, runtime memory (new generation/old generation/permanent generation), garbage collection and algorithms, JAVA four reference types, GC garbage collector, JVM class loading mechanism, etc.
3. Multi-thread concurrency: JAVA thread realization/creation method, 4 thread pools, thread life cycle (state), JAVA background thread, JAVA lock, basic thread method, thread pool principle, blocking queue, etc.
4. SSM framework: Spring features, Spring common modules, Spring principles, Spring MVC principles, Mybatis caching, etc.
5. Database: storage engine, index, database three paradigm, database transaction, database concurrency strategy, partition and table, etc.
6. Network: 7-layer network architecture, TCP/IP principle, HTTP principle, Netty, etc.
7. Design pattern: design principles + factory method pattern, abstract factory pattern, etc.
to sum up
The advanced and in-depth technical points are not introduced here, just for the convenience of friends who want to make surprise interviews in the "Golden Nine and Silver Ten", to better and faster master the technical points that occupy a higher weight in the interview field.
Of course, if you want to achieve a 95% or higher interview pass rate, it is not enough to clarify the technical points introduced above. You have to go through most of the knowledge points in the second brain map (Xmind map). , At least it can be guaranteed to write more words such as "familiar" and "mastery" on your resume.
Only by sinking down to learn and establishing some of your own core competitiveness can you hold the interviewer in your own hands.
A lot of support, you can get information for free-forward + comment, follow me, private message password "interview" (promise: 100% free)