How to check whether a sequence of characters is part of a String ignoring case sensitivity

How to check whether a sequence of characters is part of a String ignoring the case sensitivity of the String characters

In the previous video I showed you how check whether a sequence of characters is part of a given String by using the contains() method. What we could note was that the contains() is case sensitive. Now in this video, I will show you a trick that will allow use to perform a case insensitive check using the contains() method.

The trick is that, while checking the Strings, we will have to convert both the Strings to either lowercase or uppercase by using the toLowerCase() method or the toUpperCase() method. So, let me show you how with this example class Example{
public static void main(String args[]){
String sentence = "I love PROGRAMMING"; String char_sequence = "programming";

System.out.println(sentence.toLowerCase().contains(char_sequence.toLowerCase()));

System.out.println(sentence.toUpperCase().contains(char_sequence.toUpperCase())); } }

#codingriver #java #programming ... https://www.youtube.com/watch?v=0Gxz1we9Chw