Generics Types learning notes <one>

Generics Types generic learning notes 1

Author: ice clouds icecloud (AT) sina.comBLOG: http://icecloud.51.net

Time: 2004.02.15

Copyright Notice:

This article is completed by ice cloud, started 9CBS, the author retains Chinese copyright. No commercial use is not permitted without permission. Welcome to the reprint, but please keep the article and copyright statement complete. For contact, please send an email: Icecloud (at) sina.com

Java 1.5 provides generic support. A few days ago, Sun released a TUTORIAL. The following is a learning note on the tutorial.

http://java.sun.com/j2se/1.5/pdf/generics-tutorial.pdf

Generics in the Java Programming Language

Gilad Bracha

Febrary 16, 2004.

1 After the generic compilation, it will actually produce different types declarations.

Public interface list {void add (e x); item item ();} public interface iterator {e next (); boolean hasnext ();}

Basic call

List Myintlist = new linkedList (); myintlist.add (new integer (0)); integer x = myintlist.ITeger (). Next ();

Note 1: Each generic statement is only compiled once and generates a separate file for each different type. Just like the old class. For example, there may be list and list classes are generated.

Original: a Generic Type Declaration IS Compiled Once and for ALL, AND TURNED INTO A Single Class File, Just Like An Ordinary Class or Interface Declaration.

After compiling, it is equivalent to the following class.

Public interface integerList {void add (integer x); item item ();}

2 List Not List