define and call methods

eclipse java code

(1) Write comments, which include purpose, author, sample input/sample output. (2) Submit java source code. 1. Write a method to reverse a string. In main method, call the above method to reverse string "Hello, world. 2. Write a method, for a given string and a given char, find out the number of appearances of that char in the string (case insensitive). For example, given "Hello" and letter 'o', the answer is 2 (there are two occurrences of 'o'in Hello). In main method, call the above method to test the number of occurrences of letter .' in string "www.oldwestbury.edu