How to map character to numeric position in java?

Question

E.g.

• input: [\'A\', \'Z\', \'F\', \'D\', ...]
• output: [0, 25, 5, 3, ...]

In C I\'d just subtract the char from \'A\', but I don\'t seem

Answer 1

The output you are expecting is just the offset of a upper case letter with respect to 'A'. So just subtract the Unicode value of 'A' from the unicode value of the letter whose offset is needed.

example: 'B' - 'A' = 1