How to remove a certain character index in a string

Question

Say I have an unknown string of 100+ characters and I want to remove the last characters before the 100th character and replace them with ..., deleting every character after the 100th. ie:

I would like to remove the last three characters before the 100th character and replace them with a period and deleting everything after.

would become:

I would like to remove the last three characters before the 100th character and replace them with....

What is the best way to tackle this problem?

What have you tried yet? [`String`](https://docs.oracle.com/javase/8/docs/api/java/lang/String.html) has some useful methods, you should check out. — maloomeister, Apr 20 '21 at 11:00

mstaal · Answer 1 · 2021-04-20T11:05:14.987

1

Let String original = ... denote the first text. Then I suspect the following String is what you seek:

String result = String.format("%s%s", original.substring(0, Math.min(100, original.length())), original.length() > 100 ? "..." : "")

edited Apr 20 '21 at 11:05

answered Apr 20 '21 at 11:01

mstaal

590
9
25

3

This might throw an index out of bound exception.. – Murat Karagöz Apr 20 '21 at 11:03
I have added a modification based on you comment. However, the question clearly states that the String in question has length above 100. – mstaal Apr 20 '21 at 11:05

How to remove a certain character index in a string

1 Answers1