Magnus Magnus - 2 months ago 6
Java Question

Java replace only first occurrence of a substring in a string

This is somehow a duplicate of this problem Ruby - replace the first occurrence of a substring with another string just in java.

Problem is:

I have a string:

"ha bla ha ha"


Now I want to replace the first (and only the first)
"ha"
with
"gurp"
:

"gurp bla ha ha"


string.replace("ha", "gurp")
doesn't work, as it replaces all
"ha"
s.

Answer

Try the replaceFirst method. It uses a regular expression, but the literal sequence "ha" still works.

string.replaceFirst("ha", "gurp");