Java by default offers a tool for key management.
It is very usefull but the user interface is not very user friendly.
Setting aside the various restrictions of Certificate Helper here is how the same certificate is presented to the user from Certificate Helper and Keytool.
Certificate Helper NEW improved UI (https://sourceforge.net/p/certhelper/home/Comparison%20with%20Keytool/attachment/Cacerts.png):

https://sourceforge.net/p/certhelper/home/Comparison%20with%20Keytool/attachment/Cacerts.png

https://sourceforge.net/p/certhelper/screenshot/keytool.jpg

https://sourceforge.net/p/certhelper/screenshot/compareKeytool1.jpg

https://sourceforge.net/p/certhelper/screenshot/compareKeytool2.jpg

https://sourceforge.net/p/certhelper/screenshot/compareKeytool3.jpg