Can someone please help with regex for replacing all integers and doubles with in a given String with single quotes : Key1=a,Key2=2,Key3=999.6,Key4=8888,Key5=true
with this : Key1=a,Key2='2',Key3='999.6',Key4='8888',Key5=true
I would like to use regex group capturing rules to replace all numeric string startng after = and replace with ''.
Use a look arounds each end:
String quoted = str.replaceAll("(?<==)\\d+(\\.\\d+)?(?=,|$)", "'$0'");
The entire match, which is group 0, is the number to be replaced by quotes around group 0.
The match starts with a look behind for an equals and ends with a look ahead for a comma or end of input.
You may try a regex replace all approach here:
String input = "Key1=a,Key2=2,Key3=999.6,Key4=8888,Key5=true";
String output = input.replaceAll("([^,]+)=(\\d+(?:\\.\\d+)?)", "$1='$2'");
System.out.println(output); // Key1=a,Key2='2',Key3='999.6',Key4='8888',Key5=true
Here is an explanation of the regex pattern used:
([^,]+) match and capture the key in $1
= match =
(\\d+(?:\\.\\d+)?) match and capture an integer or float number in $2
Then, we replace with $1='$2', quoting the number value.
