Java 正则表达式：多个以“-”开头的分隔符

Question

Remove suffix from network name of hosts at specific delimiters preceded by "-"hyphen, so that if there are other combinations with "-", it should be taken as part of the network name.

Few examples:

abcd-new     --> abcd-new   ## Stays same ##
efgh-nic     --> efgh       ## delimiter is '-nic' ##
mnop-ilo-a   --> mnop-ilo   ## delimiter is '-a' ##
xyz-a01      --> xyz-a01   ## Stays same ##
vm-1-ad-nic  --> vm-1-ad    ## delimiter is '-nic' ##
vm-lab-nic1  --> vm-lab-nic1 ## Stays same ##

The delimiting characters are 'nic', 'a' only. Other combinations of "-" & characters should be kept intact.

How do I achieve the above using java regex ?

If possible, please suggest a single liner...

Answer 1

You can do this with a String#replaceAll method:

str = str.replaceAll("-(nic|a)\\b", "");

Regex -(nic|adm) matches a hyphen followed by nic or adm .

\\\\b is for word boundary to make sure we don't match unwanted text like abc .

You can add more suffixes in this group that you want to be removed.