Does String include case sensitive?

Both String#includes() and String#indexOf() are case sensitive . Neither function supports regular expressions. To do case insensitive search, you can use regular expressions and the String#match() function, or you can convert both the string and substring to lower case using the String#toLowerCase() function.

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Is == used for strings?

In String, the == operator is used to comparing the reference of the given strings, depending on if they are referring to the same objects . When you compare two strings using == operator, it will return true if the string variables are pointing toward the same java object. Otherwise, it will return false .

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