Property Resource Bundle
Select this to generate a property resource bundle. The name of the property resource bundle is derived from the PDML file you are editing, and is then attached to the language and country/region you specified for the file, separated by underscores. For example, file1_en_us.properties. The file extension for a property resource bundle is .properties.List Resource Bundle
Select this to generate a list resource bundle that is automatically compiled by the GUI Builder. The name of the list resource bundle is derived from the PDML file you are editing, and is then attached to the language and country/region you specified for the file, separated by underscores. For example, file1_en_us.java. the file extension for a list resource bundle is .java.