java - How to delete a string only containing a word using regex? - 


1 line: "*hello:  " 2 line: "*hello:    " 3 line: "*hello: person answered"

would delete line 1 , 2 entirely, want keep line 3, without becoming: 

"*hello:person answered"

tried: 

line = line.replaceall("*hello:(\\s*)","");

you can 

line = line.replaceall("^\\*hello:\\s*$","");

or

line = line.replaceall("\\*hello:\\s*(?!.*\\w)","");

this should you.see demo.

https://regex101.com/r/mt0ie7/24


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