how to convert a char from alphabetical character to hexadecimal number in java

Question

how to convert a char from alphabetical character to hexadecimal number in java a if any one have any built-in method in java that does the job or if you have your own metho

Answer 1

Use the apache commons codec library

Specifically: http://commons.apache.org/codec/apidocs/org/apache/commons/codec/binary/Hex.html

Answer 2

You could use:

Integer.toHexString((int) 'a');
Integer.toBinaryString((int) 'b');

Update: hex -> binary conversion:

Integer.toBinaryString(Integer.parseInt("fa", 16))

Answer 3

You can convert from char to hex string.

char ch = 
String hex = String.format("%04x", (int) ch);

To read hex and convert to binary you can do

int num = Integer.parseInt(text, 16);
String bin = Integer.toString(num, 2);