You ignore case when you treat the data , not when you retrieve/store it. If you want to store everything in lowercase use String#toLowerCase, in uppercase use String#toUpperCase. Then when you have to actually treat it, you may use out of the bow methods, like String#equalsIgnoreCase(java.
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Yes, contains is case sensitive . You can use java. util.
Read moreHow do you ignore case in Java?
use toUpperCase() or toLowerCase() method of String class . Show activity on this post. You ignore case when you treat the data, not when you retrieve/store it. If you want to store everything in lowercase use String#toLowerCase, in uppercase use String#toUpperCase.
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