Installed on my Windows 7 (32-bit) computer is ClearCase Explorer 8.0.1.9 and Eclipse Java IDE 4.7.2 (Oxygen) and JDK 1.8.0_161.
I am looking for suitable plugin so that I can perform check-out / check-in to ClearCase from Eclipse workbench.
I found a plugin on sourceforge but I would prefer something from IBM.
Also I cannot use the newer product ClearTeam Explorer, I must use ClearCase Explorer.
Try using cleartool command line options to checkout or checkin. it is very simple and got clean response.
Do integrate batch commands with Eclipse
Check this related Question How to run a batch script (.bat file) from eclipse
IBM Help page for Clear case commands Cleartool subcommands for base ClearCase and UCM