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<!-- GFM-TOC -->
* [S.O.L.I.D](#solid)
* [1. <EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD>](#1-<2D><>һ<EFBFBD><D2BB><EFBFBD><EFBFBD>ԭ<EFBFBD><D4AD>)
* [2. <EFBFBD><EFBFBD><EFBFBD>ŷ<EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD>](#2-<2D><><EFBFBD>ŷ<EFBFBD><C5B7><EFBFBD>ԭ<EFBFBD><D4AD>)
* [3. <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>滻ԭ<EFBFBD><EFBFBD>](#3-<2D><><EFBFBD><EFBFBD><EFBFBD>滻ԭ<E6BBBB><D4AD>)
* [4. <EFBFBD>ӿڷ<EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD>](#4-<2D>ӿڷ<D3BF><DAB7><EFBFBD>ԭ<EFBFBD><D4AD>)
* [5. <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD>](#5-<2D><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><D4AD>)
* [<EFBFBD><EFBFBD>װ<EFBFBD><EFBFBD><EFBFBD>̳С<EFBFBD><EFBFBD><EFBFBD>̬](#<23><>װ<EFBFBD>̳ж<CCB3>̬)
* [1. <EFBFBD><EFBFBD>װ](#1-<EFBFBD><EFBFBD>װ)
* [2. <EFBFBD>̳<EFBFBD>](#2-<EFBFBD>̳<EFBFBD>)
* [3. <EFBFBD><EFBFBD>̬](#3-<EFBFBD><EFBFBD>̬)
* [1. ??????????](#1-??????????)
* [2. ?????????](#2-?????????)
* [3. ?????<3F>I???](#3-?????<3F>I???)
* [4. ?????????](#4-?????????)
* [5. ???????????](#5-???????????)
* [???????<3F><>????](#???????<3F><>????)
* [1. ???](#1-???)
* [2. ???](#2-???)
* [3. ???](#3-???)
* [UML](#uml)
* [1. <EFBFBD><EFBFBD>ͼ](#1-<EFBFBD><EFBFBD>ͼ)
* [2. ʱ<EFBFBD><EFBFBD>ͼ](#2-ʱ<EFBFBD><EFBFBD>ͼ)
* [<EFBFBD>ο<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>](#<23>ο<EFBFBD><CEBF><EFBFBD><EFBFBD><EFBFBD>)
* [1. ???](#1-???)
* [2. ????](#2-????)
* [?<3F><>?????](#?<3F><>?????)
<!-- GFM-TOC -->
# S.O.L.I.D
S.O.L.I.D<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƺͱ<EFBFBD><EFBFBD><EFBFBD>(OOD&OOP)<29>м<EFBFBD><D0BC><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><D2AA><EFBFBD><EFBFBD>ԭ<EFBFBD><D4AD>(Programming Priciple)<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĸ<EFBFBD><EFBFBD>д<EFBFBD><EFBFBD>
S.O.L.I.D???????????????(OOD&OOP)?<3F><>?????????????(Programming Priciple)?????????<3F><>??
|<7C><>д |ȫƴ |<EFBFBD><EFBFBD><EFBFBD>ķ<EFBFBD><EFBFBD><EFBFBD>|
|??<EFBFBD><EFBFBD> |?? |???????|
| -- | -- | -- |
|SRP| The Single Responsibility Principle |<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD>|
|OCP| The Open Closed Principle | <EFBFBD><EFBFBD><EFBFBD>ŷ<EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD>|
|LSP| The Liskov Substitution Principle |<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>滻ԭ<EFBFBD><EFBFBD>|
|ISP| The Interface Segregation Principle |<EFBFBD>ӿڷ<EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD>|
|DIP| The Dependency Inversion Principle |<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD>|
|SRP| The Single Responsibility Principle |??????????|
|OCP| The Open Closed Principle | ?????????|
|LSP| The Liskov Substitution Principle |?????<3F>I???|
|ISP| The Interface Segregation Principle |?????????|
|DIP| The Dependency Inversion Principle |???????????|
## 1. <EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD>
## 1. ??????????
<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>޸<EFBFBD>ij<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>仰˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Σ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>е<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>͵<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ε<EFBFBD>ʱ<EFBFBD>򣬾<EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>ֽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ࡣ
???????????????????????????????????<3F><>?????????????????????????<3F><>????????????<3F><>?????????????<3F><>????????????????
## 2. <EFBFBD><EFBFBD><EFBFBD>ŷ<EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD>
## 2. ?????????
<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>ǿ<EFBFBD><EFBFBD><EFBFBD>չ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>޸ĵġ<EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>˵<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>չ<EFBFBD>ǿ<EFBFBD><EFBFBD>ŵģ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>޸<EFBFBD><EFBFBD>Ƿ<EFBFBD><EFBFBD>յġ<EFBFBD>
?????????????????????????????????????????????????????????????
## 3. <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>滻ԭ<EFBFBD><EFBFBD>
## 3. ?????<3F>I???
<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>ܹ<EFBFBD><EFBFBD>滻<EFBFBD>κ<EFBFBD><EFBFBD>䳬<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֮<EFBFBD><EFBFBD><EFBFBD>ž<EFBFBD><EFBFBD><EFBFBD> is-a <EFBFBD><EFBFBD>ϵ<EFBFBD><EFBFBD>
????????????????????<3F>I?<3F><>??????????????????????? is-a ?????
## 4. <EFBFBD>ӿڷ<EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD>
## 4. ?????????
<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǿ<EFBFBD><EFBFBD><EFBFBD>û<EFBFBD>ȥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Щ<EFBFBD><EFBFBD><EFBFBD>Dz<EFBFBD>ʹ<EFBFBD>õĽӿڡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>仰˵<EFBFBD><EFBFBD>ʹ<EFBFBD>ö<EFBFBD><EFBFBD><EFBFBD>ר<EFBFBD>ŵĽӿڱ<EFBFBD>ʹ<EFBFBD>õ<EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD>ܽӿ<EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>á<EFBFBD>
?????????????????<3F><>???????????????<3F><>??????????????????????????????<3F><>?
## 5. <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD>
## 5. ???????????
1. <EFBFBD>߲<EFBFBD>ģ<EFBFBD>鲻Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڵͲ<EFBFBD>ģ<EFBFBD>飬<EFBFBD><EFBFBD><EFBFBD>߶<EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڳ<EFBFBD><EFBFBD><EFBFBD>
2. <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϸ<EFBFBD>ڣ<EFBFBD>ϸ<EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڳ<EFBFBD><EFBFBD><EFBFBD>
1. ?????<3F><>?????????????<3F><>?????????????????
2. ????????????????????????????????
# <EFBFBD><EFBFBD>װ<EFBFBD><EFBFBD><EFBFBD>̳С<EFBFBD><EFBFBD><EFBFBD>̬
# ???????<3F><>????
<EFBFBD><EFBFBD>װ<EFBFBD><EFBFBD><EFBFBD>̳С<EFBFBD><EFBFBD><EFBFBD>̬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԡ<EFBFBD>
???????<3F><>???????????????????????
## 1. <EFBFBD><EFBFBD>װ
## 1. ???
<EFBFBD><EFBFBD><EFBFBD>ó<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͽ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݺͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݵIJ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>װ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>乹<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɷָ<EFBFBD><EFBFBD>Ķ<EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD>壬<EFBFBD><EFBFBD><EFBFBD>ݱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>͵<EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ܵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD>ϸ<EFBFBD>ڣ<EFBFBD>ֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һЩ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӿ<EFBFBD>ʹ֮<EFBFBD><EFBFBD><EFBFBD>ⲿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵ<EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֪<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD>ϸ<EFBFBD>ڣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD><EFBFBD>ö<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ṩ<EFBFBD>Ľӿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʸö<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
???<3F><>??????????????????????????????????????<3F>q?????????????????<3F><>??????????????????????????????????????????????????????<3F><>????????????????????????????????????????????????????????????????????????????????
<EFBFBD><EFBFBD>װ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ô<EFBFBD><EFBFBD><EFBFBD>
?????????????
1. <EFBFBD><EFBFBD><EFBFBD>õķ<EFBFBD>װ<EFBFBD>ܹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϡ<EFBFBD>
1. ??????????????????
2. <EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD>Ľṹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>޸ġ<EFBFBD>
2. ????????????????????
3. <EFBFBD><EFBFBD><EFBFBD>ԶԳ<EFBFBD>Ա<EFBFBD><EFBFBD><EFBFBD>и<EFBFBD><EFBFBD><EFBFBD>ȷ<EFBFBD>Ŀ<EFBFBD><EFBFBD>ơ<EFBFBD>
3. ??????????<3F><>??????????
4. <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD>ʵ<EFBFBD><EFBFBD>ϸ<EFBFBD>ڡ<EFBFBD>
4. ????????????????
<EFBFBD><EFBFBD><EFBFBD><EFBFBD> Person <EFBFBD><EFBFBD><EFBFBD><EFBFBD>װ name<EFBFBD><EFBFBD>gender<EFBFBD><EFBFBD>age <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD> get() <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȡһ<C8A1><D2BB> Person <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> name <EFBFBD><EFBFBD><EFBFBD>Ժ<EFBFBD> gender <EFBFBD><EFBFBD><EFBFBD>ԣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>޷<EFBFBD><EFBFBD><EFBFBD>ȡ age <20><><EFBFBD>ԣ<EFBFBD><D4A3><EFBFBD><EFBFBD><EFBFBD> age <20><><EFBFBD>Կ<EFBFBD><D4BF>Թ<EFBFBD> work() <20><><EFBFBD><EFBFBD>ʹ<EFBFBD>á<EFBFBD>
???? Person ???? name??gender??age ???????????????? get() ?????????? Person ????? name ????? gender ????????????? age ????????? age ???????? work() ??????<3F><>?
ע<EFBFBD>⵽ gender <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD> int <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͽ<EFBFBD><CDBD>д洢<D0B4><E6B4A2><EFBFBD><EFBFBD>װʹ<D7B0><CAB9><EFBFBD>û<EFBFBD>ע<EFBFBD>ⲻ<EFBFBD><E2B2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD><CAB5>ϸ<EFBFBD>ڡ<EFBFBD><DAA1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>޸<EFBFBD>ʹ<EFBFBD>õ<EFBFBD><C3B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1>Ҳ<EFBFBD><D2B2><EFBFBD><EFBFBD><EFBFBD>ڲ<EFBFBD>Ӱ<EFBFBD><D3B0><EFBFBD>ͻ<EFBFBD><CDBB>˴<EFBFBD><CBB4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>½<EFBFBD><C2BD>С<EFBFBD>
??? gender ??????? int ??????????<3F>՛<EFBFBD>????????????????????????????????????????????????????????????????????????????????<3F><>?
```java
public class Person {
@ -95,25 +95,25 @@ public class Person {
}
```
## 2. <EFBFBD>̳<EFBFBD>
## 2. ???
<EFBFBD>̳<EFBFBD>ʵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD> **is-a** <EFBFBD><EFBFBD>ϵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> Cat <EFBFBD><EFBFBD> Animal <EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD> is-a <20><>ϵ<EFBFBD><CFB5><EFBFBD><EFBFBD><EFBFBD>˿<EFBFBD><CBBF>Խ<EFBFBD> Cat <20>̳<EFBFBD><CCB3><EFBFBD> Animal<61><6C><EFBFBD>Ӷ<EFBFBD><D3B6><EFBFBD><EFBFBD><EFBFBD> Animal <EFBFBD><EFBFBD> private <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ժͷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
???????? **is-a** ????????? Cat ?? Animal ??????? is-a ???????????? Cat ????? Animal???????? Animal ?? private ????????????
Cat <EFBFBD><EFBFBD><EFBFBD>Ե<EFBFBD><EFBFBD><EFBFBD> Animal <EFBFBD><EFBFBD>ʹ<EFBFBD>ã<EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD>ǿ<EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD><EFBFBD> Animal <EFBFBD><EFBFBD><EFBFBD><EFBFBD> Cat <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ת<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ **<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ת<EFBFBD><EFBFBD>**<2A><>
Cat ??????? Animal ????????????????? Animal ???? Cat ?????????????????????? **???????**??
<EFBFBD>̳<EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>滻ԭ<EFBFBD>򣺵<EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>ܹ<EFBFBD><EFBFBD>滻<EFBFBD>κ<EFBFBD><EFBFBD>䳬<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʵ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֮<EFBFBD><EFBFBD><EFBFBD>ž<EFBFBD><EFBFBD><EFBFBD> is-a <EFBFBD><EFBFBD>ϵ<EFBFBD><EFBFBD>
??????????????<3F>I??????????????????????<3F>I?<3F><>??????????????????????? is-a ?????
```java
Animal animal = new Cat();
```
## 3. <EFBFBD><EFBFBD>̬
## 3. ???
<EFBFBD><EFBFBD>̬<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>̬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>̬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>̬<EFBFBD><EFBFBD>Ҫָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>װ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>ָ̬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>ľ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڼ<EFBFBD><EFBFBD><EFBFBD>ȷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
???????????????????????????????????????????????????????????????<3F><>???????????????????????????????????????
<EFBFBD><EFBFBD>̬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>1. <20>̳У<CCB3>2. <20><><EFBFBD>Ǹ<EFBFBD><C7B8>෽<EFBFBD><E0B7BD><EFBFBD><EFBFBD>3. <20><><EFBFBD><EFBFBD>ת<EFBFBD>͡<EFBFBD>
???????????????1. ??<3F><>?2. ???????????3. ????????
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ࣨInstrument<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ࣺWind <EFBFBD><EFBFBD> Percussion<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƕ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> play() <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> main() <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʹ<EFBFBD>ø<EFBFBD><C3B8><EFBFBD> Instrument <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> Wind <EFBFBD><EFBFBD> Percussion <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> Instrument <EFBFBD><EFBFBD><EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD> play() <EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ִ<EFBFBD><EFBFBD>ʵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ö<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> play() <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> Instrument <EFBFBD><EFBFBD><EFBFBD>ķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
?????????<3F><>???????Instrument????????????Wind ?? Percussion????????????? play() ???????????? main() ???????????? Instrument ?????? Wind ?? Percussion ?????? Instrument ??????? play() ????????????????????????????? play() ???????????? Instrument ????????
```java
public class Instrument {
@ -151,157 +151,157 @@ public class Music {
# UML
## 1. <EFBFBD><EFBFBD>ͼ
## 1. ???
**1.1 <EFBFBD>̳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>**
**1.1 ??????**
<EFBFBD>̳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ: <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>generalize<7A><65><EFBFBD><EFBFBD>ʵ<EFBFBD>֣<EFBFBD>realize<7A><65><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ is-a <EFBFBD><EFBFBD>ϵ<EFBFBD><EFBFBD>
????????????: ??????generalize????????realize????????? is-a ?????
<EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵ(generalization)
?? ???????(generalization)
<EFBFBD>Ӿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>м̳<EFBFBD>
????????<3F><>??
![](https://github.com/CyC2018/InterviewNotes/blob/master/pics/29badd92-109f-4f29-abb9-9857f5973928.png)
<EFBFBD><EFBFBD> ʵ<>ֹ<EFBFBD>ϵ(realize)
?? ?????(realize)
<EFBFBD>ӳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>߽ӿ<EFBFBD><EFBFBD>м̳<EFBFBD>
?????????????<3F><>??
![](https://github.com/CyC2018/InterviewNotes/blob/master/pics/4b16e1d3-3a60-472c-9756-2f31b1c48abe.png)
**1.2 <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͳ<EFBFBD><EFBFBD><EFBFBD>**
**1.2 ????????**
<EFBFBD><EFBFBD> <20>ۺϹ<DBBA>ϵ(aggregation)
?? ?????(aggregation)
<EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͳ<EFBFBD><EFBFBD>ֲ<EFBFBD><EFBFBD><EFBFBD>ǿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>岻<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˲<EFBFBD><EFBFBD>ֻ<EFBFBD><EFBFBD>ǻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>±<EFBFBD>ʾ B <EFBFBD><EFBFBD> A <EFBFBD><EFBFBD><EFBFBD>ɣ<EFBFBD>
??????????????????????????????????????????<3F>I????????????????????<3F><>?? B ?? A ????
![](https://github.com/CyC2018/InterviewNotes/blob/master/pics/34259bb8-ca3a-4872-8771-9e946782d9c3.png)
<EFBFBD><EFBFBD> <20><><EFBFBD>Ϲ<EFBFBD>ϵ(composition)
?? ?????(composition)
<EFBFBD>;ۺϲ<EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ͳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>岻<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˲<EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>繫˾<EFBFBD>Ͳ<EFBFBD><EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD>˾û<EFBFBD>˲<EFBFBD><EFBFBD>žͲ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǹ<EFBFBD>˾<EFBFBD><EFBFBD>Ա<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ھۺϹ<EFBFBD>ϵ<EFBFBD>ˣ<EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>˾û<EFBFBD><EFBFBD>Ա<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڡ<EFBFBD>
??????????????????????????????????<3F>I??????????????????????<3F>M??????????????????????????????????????????????????????????????????
![](https://github.com/CyC2018/InterviewNotes/blob/master/pics/7dda050d-ac35-4f47-9f51-18f18ed6fa9a.png)
**1.3 <EFBFBD>໥<EFBFBD><EFBFBD>ϵ**
**1.3 ?????**
<EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵ(association)
?? ???????(association)
<EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֮<EFBFBD><EFBFBD><EFBFBD>й<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD>־<EFBFBD>̬<EFBFBD><EFBFBD>ϵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>й<EFBFBD><EFBFBD>̵<EFBFBD>״̬<EFBFBD>޹أ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD>Ϳ<EFBFBD><EFBFBD><EFBFBD>ȷ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 1 <20><> 1<><31><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 1<><31><EFBFBD><EFBFBD><EFBFBD>Զ<EFBFBD><D4B6><EFBFBD><EFBFBD>ֹ<EFBFBD><D6B9><EFBFBD><EFBFBD><EFBFBD>ϵ<EFBFBD><CFB5><EFBFBD><EFBFBD>ʾ<EFBFBD><CABE><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD>ѧУ<D1A7><D0A3><EFBFBD><EFBFBD>һ<EFBFBD>ֹ<EFBFBD><D6B9><EFBFBD><EFBFBD><EFBFBD>ϵ<EFBFBD><CFB5>һ<EFBFBD><D2BB>ѧУ<D1A7><D0A3><EFBFBD><EFBFBD><EFBFBD>кܶ<D0BA>ѧ<EFBFBD><D1A7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB>ѧ<EFBFBD><D1A7>ֻ<EFBFBD><D6BB><EFBFBD><EFBFBD>һ<EFBFBD><D2BB>ѧУ<D1A7><D0A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD>ֶ<EFBFBD><D6B6><EFBFBD>һ<EFBFBD>Ĺ<EFBFBD>ϵ<EFBFBD><CFB5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>п<EFBFBD>ʼ֮ǰ<D6AE>Ϳ<EFBFBD><CDBF><EFBFBD>ȷ<EFBFBD><C8B7><EFBFBD><EFBFBD>
???????????????<3F><>????????????????????????<3F><>??????????????????????????????????? 1 ?? 1????? 1?????????????????????????????????<3F><>???????????????????<3F><>?????<3F><>??????????????????????????<3F><>??????????????????????????<3F><>??????????????
![](https://github.com/CyC2018/InterviewNotes/blob/master/pics/4ccd294c-d6b2-421b-839e-d88336ff5fb7.png)
<EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵ(dependency)
?? ???????(dependency)
<EFBFBD>͹<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵ<EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>, <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵ<EFBFBD><CFB5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>й<EFBFBD><D0B9><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>õġ<C3B5>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD>Ĺ<EFBFBD><C4B9><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>߷<EFBFBD><DFB7><EFBFBD><EFBFBD>IJ<EFBFBD><C4B2><EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣˫<EBA1A3><CBAB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱһ<CAB1>ֲ<EFBFBD><D6B2>õ<EFBFBD><C3B5><EFBFBD><EFBFBD>ơ<EFBFBD>
???????????????, ??????????????<3F><>??????????????????????????????????????????????????????????????????
![](https://github.com/CyC2018/InterviewNotes/blob/master/pics/47ca2614-509f-476e-98fc-50ec9f9d43c0.png)
## 2. ʱ<EFBFBD><EFBFBD>ͼ
## 2. ????
**2.1 <EFBFBD><EFBFBD><EFBFBD><EFBFBD>**
**2.1 ????**
ʱ<EFBFBD><EFBFBD>ͼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˶<EFBFBD><EFBFBD><EFBFBD>֮<EFBFBD>䴫<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ľ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ע<EFBFBD><EFBFBD><EFBFBD>Ƕ<EFBFBD><EFBFBD>󣩣<EFBFBD><EFBFBD>Ӷ<EFBFBD>Ѱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>IJ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
??????????????????????????????????????????????????????????????????????????????????????????????????????????????
**2.2 <EFBFBD><EFBFBD><EFBFBD><EFBFBD>֮սʱ<EFBFBD><EFBFBD>ͼ**
**2.2 ?????????**
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߴ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>±<EFBFBD>ʾʱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ƽ<EFBFBD><EFBFBD><EFBFBD>
????????????<3F><>???????????
![](https://github.com/CyC2018/InterviewNotes/blob/master/pics/80c5aff8-fc46-4810-aeaa-215b5c60a003.png)
<EFBFBD>ɼ<EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>ͼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>֪<EFBFBD><EFBFBD>ÿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>²<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
????????????????????????????????????
```java
publc class <EFBFBD><EFBFBD><EFBFBD><EFBFBD> {
public void Ӧս();
publc class ???? {
public void ??();
}
publc class <EFBFBD><EFBFBD><EFBFBD><EFBFBD> {
public void <EFBFBD>ⶨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>();
public void <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ȩ();
private void <EFBFBD>趫<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>();
publc class ???? {
public void ??????();
public void ???????();
private void ?ڈ???();
}
public class <EFBFBD><EFBFBD><EFBFBD><EFBFBD> {
public void <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>G<EFBFBD><EFBFBD>();
public class ???? {
public void ?????G??();
}
public class <EFBFBD>ŷ<EFBFBD> {
public void <EFBFBD><EFBFBD><EFBFBD>ؾ<EFBFBD><EFBFBD><EFBFBD>ǰ<EFBFBD><EFBFBD>();
public class ??? {
public void ??????????();
}
public class <EFBFBD><EFBFBD>Ȩ {
public void <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>();
public class ??? {
public void ???????();
}
```
**2.3 <EFBFBD>ͼ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>ͼ֮<EFBFBD><EFBFBD><EFBFBD>Ĺ<EFBFBD>ϵ**
**2.3 ???????????????**
<EFBFBD>ͼʾ<EFBFBD><EFBFBD><EFBFBD>û<EFBFBD><EFBFBD>ĽǶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
?????????????????????????
ʱ<EFBFBD><EFBFBD>ͼ<EFBFBD>ǴӼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĽǶȣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ľ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
?????????????????????????????????????
**2.4 <EFBFBD><EFBFBD>ͼ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>ͼ<EFBFBD>Ĺ<EFBFBD>ϵ**
**2.4 ?????????????**
<EFBFBD><EFBFBD>ͼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵͳ<EFBFBD>ľ<EFBFBD>̬<EFBFBD>ṹ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>ͼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵͳ<EFBFBD>Ķ<EFBFBD>̬<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>
????????????????????????????????????
**2.5 ʱ<EFBFBD><EFBFBD>ͼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>**
**2.5 ?????????**
<EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD>
?? ????
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʽ
????????????
![](https://github.com/CyC2018/InterviewNotes/blob/master/pics/25b8adad-2ef6-4f30-9012-c306b4e49897.png)
<EFBFBD>ڻ<EFBFBD>ͼʱ<EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ԭ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
????????????????????
1. <EFBFBD>ѽ<EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD><EFBFBD><EFBFBD>Ķ<EFBFBD><EFBFBD>󾡿<EFBFBD><EFBFBD>ܵؿ<EFBFBD>£<EFBFBD><EFBFBD>
1. ?????????????????????
2. <EFBFBD>ѳ<EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߡ<EFBFBD>
2. ????????????????????????????????????????????????
<EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
?? ??????
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ߴӶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>ֹ
???????????????????????????????
![](https://github.com/CyC2018/InterviewNotes/blob/master/pics/b7b0eac6-e7ea-4fb6-8bfb-95fec6f235e2.png)
<EFBFBD><EFBFBD> <20><>Ϣ
?? ???
<EFBFBD><EFBFBD><EFBFBD><EFBFBD>֮<EFBFBD><EFBFBD><EFBFBD>Ľ<EFBFBD><EFBFBD><EFBFBD>ʽͨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD>ʵ<EFBFBD>ֵġ<EFBFBD>
?????????????????????????????
<EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD>4<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͣ<EFBFBD>
?????4???????
1\. <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD>첽<EFBFBD><EFBFBD>
1\. ????????????????????
![](https://github.com/CyC2018/InterviewNotes/blob/master/pics/a13b62da-0fa8-4224-a615-4cadacc08871.png)
2\. ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ֮<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><EFBFBD>ͣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȴ<EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>
2\. ????????????????????????????????????
![](https://github.com/CyC2018/InterviewNotes/blob/master/pics/33821037-dc40-4266-901c-e5b38e618426.png)
3\. <EFBFBD>첽<EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ֮<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>ȴ<EFBFBD><EFBFBD><EFBFBD>
3\. ?????????????????????????
![](https://github.com/CyC2018/InterviewNotes/blob/master/pics/dec6c6cc-1b5f-44ed-b8fd-464fcf849dac.png)
4\. <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѡ<EFBFBD><EFBFBD>
4\. ??????????????
<EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD>
?? ????
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϵķ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʾ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>״̬<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD>䴦<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>״̬<EFBFBD><EFBFBD>
???????????????????????????????????????
![](https://github.com/CyC2018/InterviewNotes/blob/master/pics/6ab5de9b-1c1e-4118-b2c3-fb6c7ed7de6f.png)
# <EFBFBD>ο<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
# ?<3F><>?????
- Java <EFBFBD><EFBFBD><EFBFBD><EFBFBD>˼<EFBFBD><EFBFBD>
- Java ??????
- [<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD>SOLIDԭ<EFBFBD><EFBFBD>](http://www.cnblogs.com/shanyou/archive/2009/09/21/1570716.html)
- [???????????SOLID???](http://www.cnblogs.com/shanyou/archive/2009/09/21/1570716.html)
- [<EFBFBD><EFBFBD><EFBFBD><EFBFBD>UML<EFBFBD><EFBFBD>ͼ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>ͼ](http://design-patterns.readthedocs.io/zh_CN/latest/read_uml.html#generalization)
- [????UML?????????](http://design-patterns.readthedocs.io/zh_CN/latest/read_uml.html#generalization)
- [UMLϵ<EFBFBD>С<EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>ͼ<EFBFBD><EFBFBD>˳<EFBFBD><EFBFBD>ͼ<EFBFBD><EFBFBD>sequence diagram](http://www.cnblogs.com/wolf-sun/p/UML-Sequence-diagram.html)
- [UML??<3F><>???????????????sequence diagram](http://www.cnblogs.com/wolf-sun/p/UML-Sequence-diagram.html)
- [<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>------<2D><>װ<EFBFBD><D7B0><EFBFBD>̳С<CCB3><D0A1><EFBFBD>̬](http://blog.csdn.net/jianyuerensheng/article/details/51602015)
- [?????????????????------???????<3F><>????](http://blog.csdn.net/jianyuerensheng/article/details/51602015)