This OpenTool provides one of the more frequently requested features for JBuilder. When the tool is installed, line numbers are displayed in the left hand gutter margin. This is similar to the way Forte, JDeveloper, and many other IDE's function. The tool has been tested with JBuilder 4.0 but may also work with JBuilder 3.5 and/or JBuilder 5.0
As a side effect, the source view becomes the default view for all nodes including HTML nodes. For many people this may be considered a feature. Furthermore, it's not very easy to fix, so it will probably remain this way.
The line numbers do not necessarily stop at the last line in the program. There will always be one entire screen worth of line numbers, regardless of whether the source code is shorter. This is not easy to fix, so unless someone gives a fairly compelling argument for why this is bad, it will probably remain this way.
Split views are not handled. Only the primary view will display a number line.
Decompiled class files do not display line numbers. This issue is most relevant if you use the Intr@byte OpenTool.
For more information about JBuilder, including FAQ's and workarounds, please visit the Borland Community web site or try searching on your problem at http://search.borland.com.
Installation is quite simple. Put the Jar file,
NumberLine.jar, into the lib/ext
subdirectory of your JBuilder installation. On Windows, this will
typically be C:\JBuilder4\lib\ext. JBuilder will need to
be restarted before the number line begins working.