Java Generate Next Alphanumeric Number

One digit number have 10 values, but if use alphabet then number value increase 26 times. Here use 5 digit value and if use only numbers then values count goto One Lakh

`(10`^{5} = 1,00,000)

and add alphabet then value count goto more than Six Crore `(10 Number + 26 Alphabet, 36`^{5} = 6,0466176)

"One digit values count in number have 10 and in alphabet have 26.– September 14th, 2018