Padawan :
There is a field that is filled with numbers or groups of numbers.
After the comma must be a space!
The symbol "," and the space cannot be the beginning and / or at the end of the field
^[\d+]{1,}([,]{1}[\s]{1}).*[\d+]$
- this does not work. please help to write a regular expression according to the described condition.
example
1 - ok!
2, 3 - ok!
6, 7, 4 -ok!
,5 - bad!
5 6 0 - bad!
4,5 - bad!
The fourth bird :
You could use a repeating group with a space (or \s) prepended.
In your pattern you could remove the .* and match the last \d+ inside the group. Then repeat the group 0+ times.
It would look like ^[\d]{1,}([,]{1}[\s]{1}[\d]+)*$
Note that you don't have to put the \d+ between square brackets or else the + would be matched literally and the quantifier {1} could be omitted:
^\d+(?:, \d+)*$
In Java
String regex = "^\\d+(?:, \\d+)*$";