String classes are once of the core classes provided by java library and probably is one of the most frequently used class as well. It is marked Final and CANNOT be extended. Classes are marked final in order to retain their behavior.
For Strings,It is because in case if someone extends the String class and overrides the methods, the behavior will become sad. You don't want you String class to behave abnormally,thats why it is marked final.
Write a java standalone program / method to take out all the special characters in the string provided below. //ASCII a ? z (97 ? 122) String sSENTENCE = ?This!is^a$t*e)s|t?;