| Errors in Eclipse after update Java [message #252831] |
Tue, 01 April 2008 03:50  |
Eclipse User |
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Originally posted by: MacAdam.eden.invalid
Hi,
Today I updated my Java version. Instead of using the Java installer, I
manually de-installed Java (Start -> Control Panel -> Add Remove
Programs), downloaded Java, and re-installed Java. After that I fired up
Eclipse, and found out that I have countless errors in my code, errors
like ...
The import java.util cannot be resolved
and ...
Observable cannot be resolved to a type
Clearly, Eclipse can't find the JDK. Can you help me what I need to
change where so I can continue developing?
Abel
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| Re: Errors in Eclipse after update Java [message #252839 is a reply to message #252835] |
Tue, 01 April 2008 05:03  |
| Eclipse User |
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Originally posted by: MacAdam.eden.invalid
Michael Pellaton wrote:
> - in Eclipse, open the preferences dialog: "Window" > "Preferences..."
> - browse to: "Java" > "Installed JREs"
> - select the JRE you want to change and hit [Edit...]
> - now, the "Edit JRE" dialog pops up
> - [Browse...] to the new location of the JDK
Hi Michael,
Thanks for your feedback. When I tried your suggestion I saw it was not
necessary. Eclipse had automagically reset the 'Installed JREs' to the
new location.
I have the following entry in the 'Installed JREs' preference:
Name: jre1.6.0_05
Location: C:\Program Files\Java\jdk1.6.0_05
Type: Standard VM
And that is as it should be, isn't it?
But still the errors persist. Although my Java classes have countless
errors, I only have two in my Problem View:
Severity and Description Path Resource Location Creation Time Id
- The project was not built since its build path is incomplete. Cannot
find the class file for java.lang.Object. Fix the build path then try
building this project
- Severity and Description Path Resource Location Creation Time Id
The type java.lang.Object cannot be resolved. It is indirectly
referenced from required .class files
Anyone know how I can solve my current problem? Do I have to reinstall
Eclipse again (I would prefer not, as I have several libraries
installed, as Mylin, PHP, SQL Development, Tomcat etc.
Abel.
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| Re: Errors in Eclipse after update Java [message #252847 is a reply to message #252843] |
Tue, 01 April 2008 09:26 |
| Eclipse User |
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Originally posted by: eclipse-news.rizzoweb.com
Abel wrote:
> Michael Pellaton wrote:
>> - in Eclipse, open the preferences dialog: "Window" > "Preferences..."
>> - browse to: "Java" > "Installed JREs"
>> - select the JRE you want to change and hit [Edit...]
>> - now, the "Edit JRE" dialog pops up
>> - [Browse...] to the new location of the JDK
>
> I finally found out the cause of my problem. It was not the general
> preferences (Window -> Preferences) but the project specific preferences
> (right click project, choose Properties). In the 'Java Build Path' I had
> a 'JRE System Library [jre1.6.0_03] Unbound'. After choosing Edit, I
> selected 'Workspace default JRE (jre1.6.0_05) and everything went Hunky
> Dory.
>
> Evaluation:
> You can install a new version of Java independently from Eclipse
> (deinstall, download new version, reinstall). Eclipse will update the
> JRE to the new version, but you need to change the 'Java Build Path'
> manually to the new version ...
You only have the problem if your project specified a particular JRE
installation in its libraries, which is not recommended. By selecting
the Workspace Default option or an Execution Environment instead, you'll
never have that problem because Eclipse will automatically resolve those
to an appropriate JRE that is knows about.
Eric
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