I have String and int value which is nothing but ascii value for particular character. I want to search that character in String. Problem is my int variable will have always value of any character A-Z means 65 to 90, suppose I have 65 and my string do not have 'A' in it,but has 'a'.Then I want to have index of 'a'. How should I do this? Is any java class gives me character corresponding to given int value..
Converting between integers and characters, simply by casting, is rather dodgy, unless you are really sure that your integer can only represent a character in the 7-bit ASCII set. Might your application ever be internationalised? If so, you should seek a better approach.
Also, converting between upper and lower case by adding 32 to the integer value is bad, for similar reasons. Use Character.toLowerCase() and Character.toUpperCase(). These work correctly for international characters. They are also clearer to the reader of your code.
Betty Rubble? Well, I would go with Betty... but I'd be thinking of Wilma.