In this dialog, you can add one or more JDKs that will be available for the purposes explained on the script editor help page.
The table that shows the configured JDKs has several columns:
Double-click on the "Name" column to change the name of the JDK. This name is used for JDK selection in drop-down lists.
When you add a JDK, the name "JDK [major version].[minor version]" will be suggested by default. If the selection is a JRE, "JRE [major version].[minor version]" will be suggested instead. The name of the JDK configuration must be unique.
When you delete the JDK configuration that is currently used by a session, the session will still reference the same configured name for the JDK. It will then be shown in red color with a [not configured] message attached.