Question

I have a regular expression ^[\\p{L}\\d._]*\\p{L}+[\\p{L}\\d._]*$ and this works fine for

1. ABC123de (alphanumeric – irrespective of the case)
2. ABCDEfgh (only alphabets – irrespective of the case)
3. Abc_.123 (only special characters allowed are _ and .)

However, it is accepting inputs like

1. balaji_,jacob_ (having _ at the end)
2. 2balaji,2jacob (starting with a numeric)

Can we modify the above regular expression to restrict the above two test cases?

Answer 1

Sure, add the appropriate restrictions to the beginning and end like this:

^\p{L}[\p{L}\d._]*\p{L}+[\p{L}\d._]*[\p{L}\d.]$