JAVA開源網站
sourceforge http://www.sourceforge.net
java.net http://www.java.net
www.eclipse.org
www.opensource.org
Lomboz http://www.objectlearn.com/index.jsp (J2EE plugin for Eclipse)
htmlArea http://sourceforge.net/projects/itools-htmlarea/ (所見即所得的在線HTML編輯器)
XmlBuddy http://www.xmlbuddy.com/ (XML Editor plugin for Eclipse)
JFreeChart http://www.jfree.org/ (用於生成圖表的項目)
EclipseME http://eclipseme.sourceforge.net/ (J2ME Developmnt Plugin for Eclipse)
mvnForum http://sourceforge.net/projects/mvnforum/ (論壇)
jChatBox http://www.javazoom.net/index.shtml (用servlet實現的WEB聊天引擎)
POI http://jakarta.apache.org/poi/index.html (用於處理Excel,WORD等文檔的項目)
FileUpload http://jakarta.apache.org/commons/fileupload/ (用於處理HTTP文件上傳得項目)
PDFBox http://sourceforge.net/projects/pdfbox/ (處理PDF文檔的項目)
Lucene http://jakarta.apache.org/lucene/index.html (搜索引擎)
Digester http://jakarta.apache.org/commons/digester/ (處理XML信息的項目)
DBCP http://jakarta.apache.org/commons/dbcp/ (數據庫連接池)
AXIS http://ws.apache.org/axis/ (WebService 的實現框架)
Jetspeed http://portals.apache.org/jetspeed-1/ (Portal)
HSQLDB http://sourceforge.net/projects/hsqldb/ (Im memory Database Engine)
CEWOLF http://sourceforge.net/projects/cewolf/ (一套標籤庫實現Web報表,使用的是jFreeChart引擎)
Struts Menu http://sourceforge.net/projects/struts-menu/ (基於Struts的Web菜單項目)
htmlparser http://sourceforge.net/projects/htmlparser/ (用於解析HTML信息的項目)
Mondrian http://sourceforge.net/projects/mondrian/ (Open Source OLAP Database)
ProGuard http://sourceforge.net/projects/proguard/ (Java的混淆器)
InfoGlue http://sourceforge.net/projects/infoglue/ (J2EE 內容管理系統)
JPivot http://sourceforge.net/projects/jpivot/ (基於WEB的OLAP 展現)
http://java-source.net/
http://www.wnetw.net/
GoodBookNet
http://www.fastgun.net
http://www.itpub.net/
http://www.infoxa.com/
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我自己的常用：
1094個例子http://www.javaref.cn/