Java program to change Lowercase letters to Uppercase and vice-versa in a string.
2. Accept a sentence from the user.
3. Extract each character from the sentence.
4. Check whether the character is in uppercase or lowercase.
5. Convert the uppercase letters to lowercase and vice-versa.
6. Don't change special characters.
7. Print the old as well as the new sentence.
Enter a String : ToMaTo
Original : ToMaTo
Changed : tOmAtO
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