* [S.O.L.I.D](#solid) * [1. ??????????](#1-??????????) * [2. ?????????](#2-?????????) * [3. ?????�I???](#3-?????�I???) * [4. ?????????](#4-?????????) * [5. ???????????](#5-???????????) * [???????��????](#???????��????) * [1. ???](#1-???) * [2. ???](#2-???) * [3. ???](#3-???) * [UML](#uml) * [1. ???](#1-???) * [2. ????](#2-????) * [?��?????](#?��?????) # S.O.L.I.D S.O.L.I.D???????????????(OOD&OOP)?��?????????????(Programming Priciple)?????????��?? |??�� |?? |???????| | -- | -- | -- | |SRP| The Single Responsibility Principle |??????????| |OCP| The Open Closed Principle | ?????????| |LSP| The Liskov Substitution Principle |?????�I???| |ISP| The Interface Segregation Principle |?????????| |DIP| The Dependency Inversion Principle |???????????| ## 1. ?????????? ???????????????????????????????????��?????????????????????????��????????????��?????????????��???????????????? ## 2. ????????? ????????????????????????????????????????????????????????????? ## 3. ?????�I??? ????????????????????�I?��??????????????????????? is-a ????? ## 4. ????????? ?????????????????��???????????????��??????????????????????????????��? ## 5. ??????????? 1. ?????��?????????????�????????????????? 2. ???????????????????????????????? # ???????��???? ???????��??????????????????????? ## 1. ??? ???��??????????????????????????????????????�q?????????????????��??????????????????????????????????????????????????????��???????????????????????????????????????????????????????????????????????????????? ????????????? 1. ?????????????????? 2. ???????????????????? 3. ??????????��?????????? 4. ???????????????? ???? Person ???? name??gender??age ???????????????? get() ?????????? Person ????? name ????? gender ????????????? age ????????? age ???????? work() ??????��? ??? gender ??????? int ??????????�՛�????????????????????????????????????????????????????????????????????????????????��? ```java public class Person { private String name; private int gender; private int age; public String getName() { return name; } public String getGender() { return gender == 0 ? "man" : "woman"; } public void work() { if(18 <= age && age <= 50) { System.out.println(name + " is working very hard!"); } else { System.out.println(name + " can't work!"); } } } ``` ## 2. ??? ???????? **is-a** ????????? Cat ?? Animal ??????? is-a ???????????? Cat ????? Animal???????? Animal ?? private ???????????? Cat ??????? Animal ????????????????? Animal ???? Cat ?????????????????????? **???????**?? ??????????????�I??????????????????????�I?��??????????????????????? is-a ????? ```java Animal animal = new Cat(); ``` ## 3. ??? ???????????????????????????????????????????????????????????????��??????????????????????????????????????? ???????????????1. ??��?2. ???????????3. ???????? ?????????��???????Instrument????????????Wind ?? Percussion????????????? play() ???????????? main() ???????????? Instrument ?????? Wind ?? Percussion ?????? Instrument ??????? play() ????????????????????????????? play() ???????????? Instrument ???????? ```java public class Instrument { public void play() { System.out.println("Instument is playing..."); } } public class Wind extends Instrument { public void play() { System.out.println("Wind is playing..."); } } public class Percussion extends Instrument { public void play() { System.out.println("Percussion is playing..."); } } public class Music { public static void main(String[] args){ List instruments = new ArrayList<>(); instruments.add(new Wind()); instruments.add(new Percussion()); for(Instrument instrument : instruments){ instrument.play(); } } } ``` # UML ## 1. ??? **1.1 ??????** ????????????: ??????generalize????????realize????????? is-a ????? ?? ???????(generalization) ????????��??  ?? ?????(realize) ?????????????��??  **1.2 ????????** ?? ?????(aggregation) ??????????????????????????????????????????�I????????????????????��?? B ?? A ????  ?? ?????(composition) ??????????????????????????????????�I??????????????????????�M??????????????????????????????????????????????????????????????????  **1.3 ?????** ?? ???????(association) ???????????????��????????????????????????��??????????????????????????????????? 1 ?? 1????? 1?????????????????????????????????��???????????????????��?????��??????????????????????????��??????????????????????????��??????????????  ?? ???????(dependency) ???????????????, ??????????????��??????????????????????????????????????????????????????????????????  ## 2. ???? **2.1 ????** ?????????????????????????????????????????????????????????????????????????????????????????????????????????????? **2.2 ?????????** ????????????��???????????  ???????????????????????????????????? ```java publc class ???? { public void ??(); } publc class ???? { public void ??????(); public void ???????(); private void ?ڈ???(); } public class ???? { public void ?????G??(); } public class ??? { public void ??????????(); } public class ??? { public void ???????(); } ``` **2.3 ???????????????** ????????????????????????? ????????????????????????????????????? **2.4 ?????????????** ???????????????????????????????????? **2.5 ?????????** ?? ???? ????????????  ???????????????????? 1. ????????????????????? 2. ???????????????????????????????????????????????? ?? ?????? ???????????????????????????????  ?? ??? ????????????????????????????? ?????4??????? 1\. ????????????????????  2\. ????????????????????????????????????  3\. ?????????????????????????  4\. ?????????????? ?? ???? ???????????????????????????????????????  # ?��????? - Java ?????? - [???????????SOLID???](http://www.cnblogs.com/shanyou/archive/2009/09/21/1570716.html) - [????UML?????????](http://design-patterns.readthedocs.io/zh_CN/latest/read_uml.html#generalization) - [UML??��???????????????sequence diagram](http://www.cnblogs.com/wolf-sun/p/UML-Sequence-diagram.html) - [?????????????????------???????��????](http://blog.csdn.net/jianyuerensheng/article/details/51602015)