How to replace a String in java which contains dot?

Question

I need to replace a String which contains white space and periods. I have tried with the following code:

String customerName = "Mr. Raj Kumar";

customerName = customerName.replaceAll(" ", "");
System.out.println("customerName"+customerName);

customerName = customerName.replaceAll(".", "");
System.out.println("customerName"+customerName); 

but this results in:

customerName Mr.RajKumar

And

customerName

I am getting the correct customer name from the first SOP, but from second SOP I am not getting any value.

Answer 1

escape the dot, or else it will match any character. This escaping is necessary, because replaceAll() treats the first paramter as a regular expression.

customerName = customerName.replaceAll("\\.", "");

You can do the whole thing with one statement:

customerName = customerName.replaceAll("[\\s.]", "");

Answer 2

use this in your code just for remove periods

customerName = customerName.replaceAll("[.]","");