hi,
U can go through these books.
1.Core java. Vol I and Vol II;Sun microsystem;

almost book about java always tell you.

安装完J2SDK以后，在我的电脑->属性->高级->环境变量->系统变量中添加以下环境变量(假定你的J2SDK安装在c:\J2SDK1.4.2）：
 JAVA_HOME=c:\J2SDK1.4.2(不能加分号)

classpath=.;%JAVA_HOME%\lib\dt.jar;%JAVA_HOME%\lib\tools.jar;（.;不能少，表示当前路径)
path= %JAVA_HOME%\bin;
(系统里已经有了path变量，只需要在path最前面加上去即可)

www.dreamsea.net

Marc,

I personally don't like reading introductory books on languages (prefer
the language spec or language reference, etc).

Take a look at the figure on this page:
http://java.sun.com/j2se/overview.html

That figure will give you a good overview of what the standard
libraries provide. The best way to learn Java is to start working on a
project. I'd suggest taking a small-sized C++ project that you worked
on in the past and writing the whole thing in pure Java. You could use
that figure to decide what kind of project you want to do depending on
your interest and goals and pick an application that utilizes the
appropriate libraries. The library JavaDocs are pretty good for the
most part.

It will certainly take more than an year to be an 'expert' in Java (and
that too maybe in a few core areas). Part of the reason for that is
that Java has so much more outside the standard libraries that Sun
provides. Tons of frameworks and libraries for every thing.

Once you are comfortable with the standard libraries (i.e. you are
confident you can find your way around if you need something), take a
look at the other stuff. Browse through the projects on Apache and
Eclipse, read the articles on IBM developerworks, theserverside.com,
get involved in javalobby (and try the java blackbelt tests ;) , watch
the videos from javapolis (maybe even attend it!). Read the Java
classics like Bloch's Effective Java (just look for 'java' at amazon
and you'll find most of the other classics) and definitely at least one
book on design patterns using Java.

Finally, if you still want to be an expert, start filing bugs on a
large open-source project, then start committing new features to it.
Depending on your determination and skills you'll get there within 2 to
3 years. Good luck ;)

On 29 Mar 2006 01:53:49 -0800, "marcwentink@hotmail.com"
<marcwentink@hotmail.com> wrote, quoted or indirectly quoted someone
who said :

I don't think any Java programmer even knows the names of 80% of the
libraries.  You learn what you need for the current project.

You might have a look at http://mindprod.com/jgloss/j2ee.html
for an overview of the enterprise APIs.

Basics you need include JDBC, Servlet, JSP, Collections, I/O, nio,
Swing,