It can be said to acquire knowledge on this pdf, the basics of nowhere to ask about the interview, because the details of too many friends, so only the part of the knowledge point shots out of the rough introduction, each small node which has more detailed content !

In the following screenshot from pdf version of the face by a fan of the collection, so the answer to the knowledge of finishing down nearly cost him at least one month's time, in which the share to you this pdf, find useful friend in need support + can be forwarded at attention, click here to get receive a free way! ! ! In the face by the answer, as shown in the example of his knowledge, very detailed! ! !

The PDF surface through knowledge includes five parts, 26 knowledge points:

J AVA part: the Java-based, collections, concurrency, multithreading, JVM, design patterns
Data structure algorithms: the Java algorithms, data structures
Open source framework part: the Spring, MyBatis, MVC, Netty, Tomcat
Distributed parts: architecture, Redis cache, Zookeeper, kafka, RabbitMQ, load balancing, etc.
Micro Services section: SpringBoot, SpringCloud, Dubbo, Docker

A, java knowledge part

Now interview on many of the principles are the basis of special focus, but there are a lot of people to understand some of the core principles of thorough enough, especially not enough to master some basic knowledge of Java's core point, such as JVM, commonly used algorithms and data structures. As the saying goes oaks from little acorns, only the basic grasp of the firm, in order to go further, in the face of constantly updated technology to quickly grasp, while in the interview, work and better able to stand out! Under the following show must master some of these Java knowledge, a lot of content, are some of the key knowledge! ! !

1.Java basis:

2.Java collection:

3.并发知识

4.多线程

推荐阅读：《Java多线程编程核心技术》，后面有电子书免费领取！

5.java虚拟机（JVM）

JVM 是初级Java 程序员成长路上的一道必经之路，学习JVM之前，只需要知道代码编译成 Class，虚拟机加载 Class 运行就可以了，学习 JVM 之后，可以深入理解代码从编译到加载的过程、内存中对象的创建与垃圾回收、日常开发中快速定位性能问题等，当然也是面试不可缺少的加分项。

推荐阅读：《深入理解java虚拟机》

6.设计模式

之前听过一句话，“很多程序员不知道怎么组织代码、怎么提升效率、怎么提高代码的可维护性、可重用性、可扩展性、灵活性，写出来的代码一团糟，但居然可以正常运行”。对于这样的说法，看着入行时留下的代码，惭愧地笑了，或许对于大部分人都会有同感。

从 JDK 源码，到主流开源框架，设计模式的应用俯拾皆是，“设计模式为我所用”或多或少已经成为程序员编码思维的本能了。

知识点：