In fact, in the final analysis, my own technology is not awesome , I only use frames , Do not understand the source code , Do not understand its underlying mechanism and implementation principle , Only the development of source code library .
But I just don't want to , When beginners learn java Just to get into a big factory , heavy 8 Months of study , My successful job hopping, Ali . Only after learning that job hopping is not difficult , The hard part is that you really understand java, therefore , I'd like to share my learning and interview experience with you who want to enter a large factory .
First ,java I still don't recommend self-study , Because you know a little but not all , Self study is easy to fall into a dead end , And want to get into big factories , You have to have this 3 spot ：
1、 High quality learning materials
2、 The right way to learn
3、 A lot of practice + It's a real project
I took time to watch the live course in the evening , About every day 2-3 Hours of time , If you don't have time on that day, you can watch the video on the weekend , It doesn't affect working during the day , I can calm down and study at night .
Take a look at my study materials , I'm afraid it's not after graduating from high school , I haven't seen so many learning materials any more .
There are friends who need this information , Can be small forwarding and attention , After that, private letters “666” Free access ！
This is just the tip of the iceberg , There is also practical operation
What's more, the ultimate goal of learning —— Interview information , It must never be left behind , Look how many I have .
Many people say that if you want to find these materials on the Internet, it's OK , Maybe you can find some on the Internet , But can you find a way to learn ？ Can only look at a pile of information in a daze , I don't know how to start .
Maybe you just finished java come out , Or like me, I already have such shallow experience , Want to enter a big factory , Just have the information ？ The doors of that big factory are going to be broken , Instead of being confused with the information , It's better to learn from other people's experience , Go to the major learning and communication groups , The results are much faster . The great gods are here , You can learn more experience , Hit the big factory .
Like me, it's already right java Have a certain understanding of , Directly up is the framework source code analysis topic ,Spring、MyBatis And design models .
majority java Engineers are using Spring There will be various problems in the process , such as ： Looking at so many components, I don't know how to start ？Spring How to solve the problem of circular dependence ？ How to integrate Spring Combined with other frameworks ？ This is also my own problem in real life . When I was studying , I'll get to know Spring The core structure of , Again from IOC、Aop Start with the core idea , Step by step, what problems are solved by these two containers .
MyBatis It's also a common interview question , Besides the source code , For related concepts 、 cache 、 Architecture is far away from 、 plug-in unit , We all need to understand , When I was interviewed, I was really asked . therefore , Application framework Spring、ORM frame MyBatis And design models , I spent 1 Six months to study and digest . and 1 It's still because of the actual combat experience and work experience. The awesome people are teaching you the correct learning methods , In this time “ check before acceptance ” Successfully enter the second learning stage .
Basically every stage is 1 Six months of study , Like the second phase of concurrent programming , Concurrent programming is java One of the important characteristics of language , stay java Many basic concurrent functions are provided on the platform to assist the development of multithreaded applications .
Developing 、 There are great difficulties in testing and debugging multilinear programs , Because concurrency errors don't usually occur in a certain way , If something goes wrong , That was the worst moment . For example, in a formal product or under high load , When concurrency errors are found , It can bring down the whole project team , Even destroy the whole project . therefore , We can see how important this content is , And understanding each concurrency is also a prerequisite for entering a large factory .
The third stage is the performance tuning topic , Mainly JVM、Mysql、Nginx、TOMCAT, after 2 Months of study , Finally into java An important part of the advanced stage , especially JVM, stay java Research in this field goes deeper , It's a topic that's always avoided .
class The file is JVM After loading , after JVM Memory space allocation based on , It's ultimately done by the execution engine class Execution of documents , Of course, this process is assisted by other role modules , These modules work together to make a java The program runs successfully , And these templates are also learning JVM Important part of .
（JVM Memory model diagram ）
Mysql I also study very hard , Because I saw netizens interviewing Ali , Because of the relevance of this question , Then the interview is cool , Of course , I still study hard with self-knowledge , Sure enough, I passed the interview Part Interview questions for .
The last phase is the most agonizing distributed framework project , after 2.5 Months , Distributed message middleware 、 Distributed storage middleware 、 Distributed framework .
The operation of distributed framework in e-commerce projects is relatively concentrated , Alicloud message queue MQ（Message Queue） It is the core product of enterprise Internet architecture , Serving the whole Alibaba Group has exceeded 8 year , After repeated polishing of Alibaba's trading core link and severe test of double 11 over the years , It's a real low latency 、 High concurrency 、 High availability 、 Highly reliable , Distributed message middleware that can support trillions of data peaks .
therefore , Why is this part the hardest part , Because Ali itself is using distributed systems , I don't dare to relax at all , My eyes will stick to the mobile screen when I study , I'm afraid I'll miss any knowledge , Just missing an opportunity .
Every stage should be a combination of theory and practice , Every time I finish my study, I will do questions to consolidate my knowledge , When all the knowledge has been learned , And we will continue to work on the overall practical problems , Just to test that you really understand , Or is it just a flash in the pan understanding .
In addition to basic knowledge , How to master skills in an interview , How to use it well in the actual interview is also the key .
Ali 1 Face is the phone face ,2 Noodles are also telephone noodles ,3 Face is the phone face and then turn to the video before passing through , Hurry to Hangzhou to work ~
For those students who have the same dream of Dachang as me , I really think my way of learning is very good , Because these are all valuable materials left by successful people , In addition, we have the experience from their actual combat , Tell you how to understand , So it gives you a shortcut to success , To get on the bus , Join me in capturing the big factory ！
There are friends who need this information , Can be small forwarding and attention , After that, private letters “666” Get it for free ！
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