JDK Source Reading-3-design mode-structured mode

1. Adapter (Adapter)

• java.util.Arrays$ArrayList(java.util.Arrays#asList())；

 这里要特别注意，这里的ArrayList是Arrays的内部类不是java.util.ArrayList.这里的ArrayList是外部不可见的，用来把一个array适配成List.

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Sample:

String a[] = new string[]{"123", "ABC", "XYZ", "ddd"}; List List = Arrays.aslist (a);

• java.io.InputStreamReader(InputStream)

 InputStream --> Reader

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• java.io.OutputStreamWriter(OutputStream)(Returns a Writer )

  See the top two

2. Combination mode (Composite)

• java.awt.Container#add(Component)

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3. Adorner (Decorator)

• All Writer 的子类有一个构造函数接受同类型的实例，下面用一个例子来图示 , , , follow Reader . java.io.InputStream OutputStream

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• 还参见java.util.Collections, of checkedXXX() , ,. synchronizedXXX() unmodifiableXXX()方法

4. Appearance mode (facade)

• interfaces such as Iconnection in JDBC

5. Enjoy meta mode (Flyweight)

• java.lang.Integer#valueOf(int)(Boolean, Byte, Character, Short, Long )

6. Agent mode (proxy)

• java.lang.reflect.Proxy

  
  

JDK Source Reading-3-design mode-structured mode