HOCON very close to properties

regular.conf

# Project
application.group=${project.groupId}
application.name=${project.artifactId}
application.version=${project.version}

# Application Secret
application.secret="7/19T8CiU@paf[9bF7ll<1/5@P:7xBQhFkxx??9ALJ[3B<cjoKm_k50yA_Ib2uT2"

# Configure ports.
http.port=9000

# Etag and Cache Control
# http.useETag = false
# http.cache_control_max_age = 0

# Test data
key.val = value

key.utf = éøîüå˚πœΩç≈˜µ√ ∑ß˙∫℃

key.int:1
key.sub.foo:2
key.bool.1:true
key.bool.2:false
key.bool.3=no
key.bool.4=yes

key.array = [a,b,c]
key.array2 = [a, b, c]

other.conf = a_file.txt

key.long = 9999999999999