Import in Java

[Lars Dold]

Hello,

I'am studying the sun tutorial for the java language, and have a problem with an import in eclipse.

From the Sample below there is an import which don't work in eclipse.

import com.sun.corba.se.impl.javax.rmi.CORBA.Util;

http://java.sun.com/docs/books/tutorial/ui/overview/PasswordStore-1.0-src.zip

Could anyone tell me how to get that import work?

Thank you very much

kind regards
Lars

[Jan Cumps]

Hi Lars,

Welcome to JavaRanch.

From the Sample below there is an import which don't work in eclipse.

What error do you get?

[Lars Dold]

Hi Jan,

Sorry forget to mention the error:

Access restriction: The type Util is not accessible due to restriction on required library /usr/lib/jvm/java-6-sun-1.6.0.12/jre/lib/rt.jar

Hope that clears the problem.

thank you

kind regards

Lars

[Jesper de Jong]

Lars, welcome to JavaRanch.

That import is strange. You should not normally import anything from com.sun.* packages - those classes are not part of Java's standard API and may not be accessible or even present in all versions of the JDK.

In which tutorial did you find the code that uses that import?

[Lars Dold]

Hi,

the demo is described here:
http://java.sun.com/docs/books/tutorial/ui/overview/demo.html

And can be downloaded here:
http://java.sun.com/docs/books/tutorial/ui/overview/PasswordStore-1.0-src.zip

(Edited the link in my previos post)

Error in Class:
/passwordstore/swingx/LookAndFeelMenu.java
line 8

thanks

kind regards

Lars

[Campbell Ritchie]

Moving to IDEs forum because this is an IDE problem.

[Campbell Ritchie]

Another possible explanation, which is why I think it is an IDE-related problem:

The databases or properties files which Eclipse uses contain a larger "stock" of classes than the usual Sun/Oracle API. There are obviously several classes called Util. When you click Util and ctrl-space or whatever you use to expand the name, Eclipse gives you a drop-down list with the possibilities in alphabetical order. You might want java.something.somethingelse.Util, but com....Util comes out first because "com" comes before "java" in the alphabet. so what has happened is that you have seen "Util" on the drop-down list and clicked on that, whereas the Util you really wanted was farther down the list.

I have made that mistake many times myself.

[Campbell Ritchie]

If they require you to use the com.sun package, they ought to tell you how to download it and add it to your classpath.

[Lars Dold]

Hi,

I have changed the import to that:

import com.sun.corba.se.impl.javax.rmi.CORBA.*;

because there is no entry with CORBA.Util

And now it works!

Thanks to all of you, for your good help

kind regards

Lars

[Tim Holloway]

Actually, and example with "com.sun.corba.anything" is probably horribly old and likely obsolete. That's because CORBA was integrated into the stock JVM somewhere about Java 1.2 or so, and at that point, the classes were replaced with a similar-but-not-identical set of standard classes, which should be in the javax and/or java package trees.

Of course, CORBA all but died in 2007 as web services has pretty much supplanted it. Eventually it might make a comeback, since there are unique and desirable features about CORBA, once you get past its limitations (the original spec had little security and didn't play well with firewalls).