Minusing 3 characters from the end of a string in Java

Question

I have a string oCustomerOrderNumber which I am passing a value into iCustomerOrderNumber. I would like to remove the last 3 characters from this iCustomerOrderNumber but unable to get this to work. Error I get is that it does not like the -.

Code:

 oCustomerOrderNumber = iCustomerOrderNumber.trim() -  
 (iCustomerOrderNumber.length() -3);

Example. ICustomerOrderNumber is 1234567 I want oCustomerOrderNumber to be 1234.

you should use the substring method. trim() doesn't return a length, but a trimmed version of a String — Stultuske, Dec 04 '18 at 14:02

score 3 · Answer 1 · answered Dec 04 '18 at 14:02

3

For getting a portion of a string you can use substring method and here you can define from where until where you want to fetch from any String:

iCustomerOrderNumber.substring(0, iCustomerOrderNumber.length()-3);

answered Dec 04 '18 at 14:02

Mehdi

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you should at least provide some explanation of what you do, why you do it, and what the difference with the original code is – Stultuske Dec 04 '18 at 14:04
@Stultuske yeah it was a fast send. hehe :-) – Mehdi Dec 04 '18 at 14:04
And all in all you can not remove anything from String, since String is immutable class, but you can create a new modified string from existed one, as Mehdi showed. – Pasha Dec 04 '18 at 14:07

score -4 · Answer 2 · answered Dec 04 '18 at 14:06

-4

oCustomerOrderNumber = iCustomerOrderNumber.substring(0, (iCustomerOrderNumber.length() -3));

answered Dec 04 '18 at 14:06

CR Sardar

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This is nothing but a copy-paste of a (part of a) previously posted answer – Stultuske Dec 04 '18 at 14:08

Minusing 3 characters from the end of a string in Java

2 Answers2