Char array to a String array with hex

Hi Guys,

I have a string array but each cell in the 1d string array stores each character

the text file is :

"START START START
The quick brown fox jumps over the lazy dog 1234567890-= !"$%^&*()_+ QWERTYUIOP{}ASDFGHJKL:@~|ZXCVBNM<><? /.,mnbvcxz\asdfghjkkl;'#][poiuytrewq789654123.0
+-*/``""$%£ hello this is a test file using all the characters availible on the keyboard for input END END END END"

so in the string it is:
[0] = S, [1]=A, [2]=R ...ect along the text

basically i need to convert each character in each cell of the 1d string array to its hesidecimal value .

i have created my own method which will take in a char and return a string containing the charcters hex value.

Code :

---

    public static String toHex(char c)
    {
     char char2ascii = c;
     int i = 0;
     int num = (int) char2ascii;
     String hex ="";
    char[] digits = new char[2];
    do {
      digits[i++] = Character.forDigit(num % 16, 16);
      num /= 16;
    } while (num != 0);
 
    for (int j = 1; j >= 0; j--){
        hex += digits[j];
    }
    hex=hex.toUpperCase();
    return hex;
    }

---

what i want to do is run each cell through the toHex method so i everntally have a string array containing the hex value of each character in my text.

I understand this is long weinded but i hope u hunderstand what im trying to get at

example

i want:

String[] hexarray = S, T, A, R, T

a run it through my method to convert to hex
then it will become

String[] hexarray = 53, 54, 41, 52, 54


does anyone know how i can achive this. Im not allowed to use inbuilt libarys and classes to do the hex conversion thats why i have my own method for it .


Thank you