Convert double to file as a String/Chars (For encryption)

Question

I'm trying to represent numbers to a String and backwards. For instance if i have the number 64568899. I want to represent it in a way i could decrypt it later but i need to write it as String or chars but not as a number. Any ideas ?

A string can contain numbers? Also numbers are legal char's. Do you have some special reason to convert numerical characters to [a-z]? — awi, Jan 28 '14 at 08:11
I'm looking for encryption but i want to be able to decrypt it later — Harel Levy, Jan 28 '14 at 08:32

score 0 · Answer 1 · edited May 23 '17 at 10:25

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You can represent any binary data to string using base64 string. Base64 Encoding in Java

With doubles you might just need String.valueOf(double).

edited May 23 '17 at 10:25

Community

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answered Jan 28 '14 at 08:15

Reinstate Monica

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But i want to write it as chars not as an integers. – Harel Levy Jan 28 '14 at 08:48

score 0 · Answer 2 · answered Jan 28 '14 at 08:16

If you only want to convert your number into a String, just use the valueOf method of String class:

String val = String.valueOf(number);

For converting Strings to Numbers use the valueOf methods of Integer, Double or Float (depends on which numbers you will have):

Integer val = Integer.valueOf(stringValue);

Convert double to file as a String/Chars (For encryption)

2 Answers2