Shulou(Shulou.com)06/01 Report--

1. Adapter (Adapter)

Java.util.Arrays$ArrayList (java.util.Arrays#asList ())

It is important to note here that ArrayList is the inner class of Arrays, not java.util.ArrayList. The ArrayList here is invisible from the outside and is used to adapt an array to List.

Sample:

String a [] = new String [] {"123", "abc", "xyz", "ddd"}; List list = Arrays.asList (a)

Java.io.InputStreamReader (InputStream)

InputStream-- > Reader

Java.io.OutputStreamWriter (OutputStream) (returns a Writer)

See the previous two

two。 Combination mode (Composite)

Java.awt.Container#add (Component)

3. Decorator (Decorator)

All subclasses of java.io.InputStream, OutputStream, Reader and Writer have a constructor that accepts instances of the same type, which is illustrated with an example below.

See also the checkedXXX (), synchronizedXXX (), unmodifiableXXX () methods of java.util.Collections.

4. Appearance mode (Facade)

IConnection and other interfaces in JDBC

5. Shared meta-mode (Flyweight)

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

6. Agent mode (Proxy)

Java.lang.reflect.Proxy

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.