Assignment on Strings:
String s =”This is a java class”

1. How many words in a String?
2. Length of the String?
3. How many single character words in the String?
4. Reverse each word ?
5. Reverse entire String
6. Replace java with SQL
7. Letter at the center
8. Index of j at center
9. Number of times each letter repeated.
10. Identify a letter which is not repeated.
11. Identify the index of each word
12. Identify the index of each word
13. Convert the entire String in to upper case ?