Preface:

The 283-page PDF, carefully organized by Alibaba’s bigwigs, is packed with dry stuff. Contains the core knowledge of 2019 Java, to share with you

This PDF contains 26 points in five major sections:

• Java Section: Java Basics, Collections, Concurrency, Multithreading, JVM, Design patterns
• Data structure algorithm: Java algorithm, data structure
• Open source framework part: Spring, MyBatis, MVC, Netty, Tomcat
• Distributed part: architecture design, Redis cache, Zookeeper, Kafka, RabbitMQ, load balancing, etc
• Microservices: SpringBoot, SpringCloud, Dubbo, Docker

The JVM on

The JVM memory model and the GARBAGE collection mechanism of the JVM have always been a hot topic in the Java industry (actual tuning, interview). The JVM is an important part of the Knowledge of Java and one of the most frequently asked interview questions.

Java collection

The Java collection class is a particularly useful utility class for storing objects of varying numbers and implementing commonly used data structures, such as stacks, queues, and so on. In addition, Java collections can be used to hold associative arrays with mappings. Java collections can be roughly divided into List, Set, Queue, and Map.

Java multithreaded concurrency

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Java based

Nowadays, many interviews attach great importance to the basic knowledge of Java. When we work for a long time, we will find that we suddenly feel that we have forgotten the basic knowledge of Java very badly, or that the knowledge is not firmly mastered. Some core Java basic knowledge is not very understanding, or need to consolidate learning.

Principle of the spring

Spring is an open source development framework for Java enterprise applications. Spring is primarily used to develop Java applications, but some extensions are targeted at building Web applications on the J2EE platform. The Spring framework aims to simplify Java enterprise application development and promote good programming habits through a POJO-based programming model. Is also a big factory interview often asked.

Micro service

When introducing micro-service, we should first understand what micro-service is. As the name implies, micro-service should be understood from two aspects: what is “micro” and what is “service”.

Micro, in the narrow sense, means small size and the famous “2 Pizza Team “well explains this explanation. (2 Pizza team was first proposed by Bezos, CEO of Amazon, which means that the design of a single service requires only two pizzas from all participants in design, development, testing and operation and maintenance.) And the so-called service, must be different from the system, service one or a group of relatively small and independent function unit, is the user can perceive the minimum function set.

Netty and RPC

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Network and Log

zookeeper kafka

RabbitMQ

Reader benefits:

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