auto commit

notes/面向对象思想.md

@@ -89,24 +89,28 @@ Animal animal = new Cat();
 
 ```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<Instrument> instruments = new ArrayList<>();
         instruments.add(new Wind());
@@ -353,4 +357,3 @@ Vihicle .. N
 - [看懂 UML 类图和时序图](http://design-patterns.readthedocs.io/zh_CN/latest/read_uml.html#generalization)
 - [UML 系列——时序图（顺序图）sequence diagram](http://www.cnblogs.com/wolf-sun/p/UML-Sequence-diagram.html)
 - [面向对象编程三大特性 ------ 封装、继承、多态](http://blog.csdn.net/jianyuerensheng/article/details/51602015)
-