java - Regex pattern accepting comma or semicolon separated values

Question

I need a regex pattern that accepts only comma separated values for an input field.

For example: abc,xyz,pqr. It should reject values like: , ,sample text1,text2,

I also need to accept semicolon separated values also. Can anyone suggest a regex pattern for this ?

Answer 1

Simplest form:

^w+(,w+)*$

Demo here.

---

I need to restrict only alphabets. How can I do that ?

Use the regex (example unicode chars range included):

^[u0400-u04FFa-zA-Z ]+(,[u0400-u04FFa-zA-Z ]+)*$

Demo for this one here.

Example usage:

public static void main (String[] args) throws java.lang.Exception
{
    String regex = "^[u0400-u04FFa-zA-Z ]+(,[u0400-u04FFa-zA-Z ]+)*$";

    System.out.println("abc,xyz,pqr".matches(regex)); // true
    System.out.println("text1,text2,".matches(regex)); // false
    System.out.println("ЕЖЗ,ИЙК".matches(regex)); // true
}

Java demo.