Your java is Awsome but difficult to convert comma with something else

[HannahJSwystun]

Hi,

Thank you for this samples, however, i would like to know the best practices to change comma in value pair with something like ---->

Ex :
DIFF : {name=new_val, old_value} => possibility to : DIFF : {name=new_val <----- old_value}

Thank you so much :)