UML

WHAT IS UML

• Unified Modeling Language (统一建模语言)
• 将系统可视化，让规格和设计文档化的表现方法

How to use

类图

• 类与层次关系
  • 继承

abstract class ParentClass {....}

class ChildClass extends ParentClass{....}

- 接口与实现

``` java
interface Printable {....}

class PrintClass implements Printable {...}
```

- 聚合

``` java

class Color {}

class Fruit {
    Color color;
}

class Basket {
    Fruit[] fruits;
}
```

- 可见性

``` java
class something {
    private int privateField;
    protected int ProtectedField;
    public int publicField;
    private void privateMethod() {}
    protected void protectedMethod() {}
    public void publicMethod() {}
}

 + public
 - private
 # protected
```

• 类的关联

• 时序图

本文转自  拖鞋崽  51CTO博客，原文链接:http://blog.51cto.com/1992mrwang/2046976