Case-insensitive means the string which you are comparing should exactly be the same as a string which is to be compared but both strings can be either in upper case or lower case . ( ie., different cases)
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CompareTo and Compare(String, String) methods. They all perform a case-sensitive comparison .
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Comparing strings in a case insensitive manner means to compare them without taking care of the uppercase and lowercase letters. To perform this operation the most preferred method is to use either toUpperCase() or toLowerCase() function . toUpperCase() function: The str.
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Use the equals() method to check if 2 strings are the same. The equals() method is case-sensitive , meaning that the string “HELLO” is considered to be different from the string “hello”.
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The contains() method of the String class accepts Sting value as a parameter, verifies whether the current String object contains the specified String and returns true if it does (else false) .11 Eki 2019
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Note that string contains() method is case sensitive , so “abc”. contains(“A”); will return false . The argument of String contains() method is java. lang.
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Java String equalsIgnoreCase() Method The equalsIgnoreCase() method compares two strings, ignoring lower case and upper case differences. This method returns true if the strings are equal, and false if not. Tip: Use the compareToIgnoreCase() method to compare two strings lexicographically, ignoring case differences.
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