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How to add project of different workspace into the current workspace in Eclipse

I have two workspaces and I want to use java file as a parent class or you can say extends it from workspace2 to workspace 1 in eclipse, how can I do this?
As I can add project from same workspace but unable to figure out from different workspace.
I dont want to import the project.
Thanks in advance

You can make New File -> advanced options and Link to Folder in the system where the class is

You need to import your project from workspace 2 to workspace 1.
You can reference your project in another workspace in the build path configuration of your project, linking two eclipse project, even if they are in different workspaces.

If you want the code to be available for changes this are your options:
You have to either import the project or create a new workspace that includes them all.
Note that you may extend the java class from the same project or from another project within the workspace, but not from another workspace.
If you are willing not to have the code in front of you available for changes, you may build the first workspace' project into a jar and then use that as part of your other workspace.

Way 1
You can add the second project's src folder to the current project and you can add them in your project.
Right click on project -> Build path - > source tab - > link source
Way 2 :
Make that external project as a jar and add as a dependency.

Build path entry is missing: /src/test/java

While running my java project on Eclipse Luna, I have some errors due to which I suppose related to this problem.I right click on the project, choose properties --> java build path --> source, I see a warning at the top:
And it seems that I have forgotten to add this package at the beginning of my project.I want to add it now, but I cannot do it via "Add Folder" button.When I press "Add Folder" button, a window appears like this one:
However, I believe I should add it under "Java Resources" on the tree:
How can I modify this?
Thanks for any help..

src/test/java is just maven's default entry for any test classes. If you have (or plan to have) test classes, you can create a new folder structure test/java below your src folder and afterwards select it in the dialog you've shown. If you don't plan to have any test classes, you can safely remove the entry from the build path.

This worked for me:
mvn clean install

How to add missing src/test/java folder to the maven project in Eclipse
1) Create a folder test/java under src folder
2) Right click on the project and choose Maven --> Update Project --> choose for Force update of Snapshot/Releases and click ok. Now test folder should appear as src/test/java in Eclipse project explorer

Call three projects from onther project,Java

I want to ask something. I have done three small projects on Java at Netbeans. Can I make a project which it calls theese three projects ? I want to have all theese projects in one programm. Thank you !

Basically, yes.
Expand the "master" project and right click on the "Libraries" node.
From the popup, select "Add Project". Browse to the location of the project you want to link and select "Add Project JAR Files".
The project will now be linked to your project and you should be able to access it's classes.
Note, if the child project has any dependencies of it's own, you will need to add those to the "master" project as well.

You can either add those projects into your new program build path or make the libraries and use it.

Club several eclipse projects into one?

I have several modules of a project and i have made each module as a project in eclipse as a seperate project..
Now i want to combine those projects in a masterproject..
Is it possible to do it?
thanking you in advance!!

Right Click on project. Go to build path->Configure build path->Projects. here you can add any project (which is already in eclipse) on the build path.

Yes. You can easily set things up so that one project uses other projects. Simply right click on the project in the package explorer, then click Build Path, then Configure Build Path, then add Project. Voilà!

Eclipse - Importing your own library

Okay, hopefully this is quick and easy.
I have two separate java projects, 'Library' and 'Project', and I have a class in 'Project' that wants to implement a method found in 'Library'. I am looking for some kind of 'import' call to make at the top of my 'Project' class, to make the methods found in 'Library' accessible in that project.
How would I do that?
On another note, this 'Library' project only exists because I want to use a number of classes of my own to supplement the the usual java libraries (java.util, java.io, etc...). Is there a way I can add my java project to my java libraries? (ie. 'import java.Library.className;')
Thanks,
Jonathan

Just have "Project" reference your "Library", on windows the process is (using menu / tab names)
1. Go to: Project -> Properties -> Java Build Path -> Projects
2. Client Add...
3. Select your "Library" project from the list
4. Click Ok
5. Click the other Ok
Now your done and you can use import for classes in your "Library"

There are several ways:
A. Import source files
Right click your project in the project explorer
select
Properties-->Java Build Path
Click on the Source tab and the Link Source button and add the root folder containing Library and click Finish
Now click on the Projects tab and click the Add button to add your 'Library'. Click Ok and you're done
B. Import Jar
When you compile your eclipse project it creates a jar for your project in the 'Build' subfolder of the root directory of your project. To import that in you current project:
Again Right click your project in the project explorer
Select Properties-->Java build Path
Click on the Libraries tab and click Add External JARs. Navigate to the folder containing Library.jar and click Finish and click Ok
You should now be able to import your names from your Library Project