I am using Eclipse Luna and I had difficulty installing the ecobertura plugin. So I installed EclEmma plugin and it was intitutive to use it. After installing the plugin, restart the eclipse IDE.
To find the coverage of the test cases you have written, all you have to do is
Right click on the desired package or even the whole project > Coverage As > Junit Test
The Coverage View automatically appears. Or you can open the coverage view from Window > Show View > Other > Java > Coverage. Or you can just type "Coverage" in the Quick Access search box in the eclipse.
The Coverage view is capable of displaying the coverage percentage at project level, source folder level, package level, Class level and even at method level.
You can change the root level of the entries shown in the coverage tree by using the toolbar in the coverage view.
You can change the coverage parameters to method or Line or instruction or brach based on your requirement.
And finally you can export the test coverage results to HTML or XML or CSV formats by right-clicking anywhere inside the coverage view and selecting Export session.