Convert Hex to ASCII in Java with Example

If you want to convert a HEX value into an ASCII Character in Java, you can make use of the parseInt() function from Integer class with radix as 16 (base 16), then we cast the obtained integer from parsing the hexadecimal string and into a character type.

Example:

        String hexValue = "4E"; //
        System.out.println("HEX: " + hexValue);
        char asciiChar = (char) Integer.parseInt(hexValue, 16);
        System.out.println("ASCII: " + asciiChar);

Example: ASCII and HEX Table using Java

public class AsciiTableWithHex {
    public static void main(String[] args) {
        // Table header
        System.out.println("+-------+-------+");
        System.out.println("| Hex   | ASCII |");
        System.out.println("+-------+-------+");
        
        for (int i = 0; i <= 127; i++) {
            String hexValue = String.format("%02X", i);
            char asciiChar = (char) i;
            System.out.printf("| 0x%s |   %c   |\n", hexValue, asciiChar);
        }

        // Table footer
        System.out.println("+-------+-------+");
    }
}

Output:

-------+-------+
| Hex   | ASCII |
+-------+-------+
| 0x21 |   !   |
| 0x22 |   "   |
| 0x23 |   #   |
| 0x24 |   $   |
| 0x25 |   %   |
| 0x26 |   &   |
| 0x27 |   '   |
| 0x28 |   (   |
| 0x29 |   )   |
| 0x2A |   *   |
| 0x2B |   +   |
| 0x2C |   ,   |
| 0x2D |   -   |
| 0x2E |   .   |
| 0x2F |   /   |
| 0x30 |   0   |
| 0x31 |   1   |
| 0x32 |   2   |
| 0x33 |   3   |
| 0x34 |   4   |
| 0x35 |   5   |
| 0x36 |   6   |
| 0x37 |   7   |
| 0x38 |   8   |
| 0x39 |   9   |
| 0x3A |   :   |
| 0x3B |   ;   |
| 0x3C |   <   |
| 0x3D |   =   |
| 0x3E |   >   |
| 0x3F |   ?   |
| 0x40 |   @   |
| 0x41 |   A   |
| 0x42 |   B   |
| 0x43 |   C   |
| 0x44 |   D   |
| 0x45 |   E   |
| 0x46 |   F   |
| 0x47 |   G   |
| 0x48 |   H   |
| 0x49 |   I   |
| 0x4A |   J   |
| 0x4B |   K   |
| 0x4C |   L   |
| 0x4D |   M   |
| 0x4E |   N   |
| 0x4F |   O   |
| 0x50 |   P   |
| 0x51 |   Q   |
| 0x52 |   R   |
| 0x53 |   S   |
| 0x54 |   T   |
| 0x55 |   U   |
| 0x56 |   V   |
| 0x57 |   W   |
| 0x58 |   X   |
| 0x59 |   Y   |
| 0x5A |   Z   |
| 0x5B |   [   |
| 0x5C |   \   |
| 0x5D |   ]   |
| 0x5E |   ^   |
| 0x5F |   _   |
| 0x60 |   `   |
| 0x61 |   a   |
| 0x62 |   b   |
| 0x63 |   c   |
| 0x64 |   d   |
| 0x65 |   e   |
| 0x66 |   f   |
| 0x67 |   g   |
| 0x68 |   h   |
| 0x69 |   i   |
| 0x6A |   j   |
| 0x6B |   k   |
| 0x6C |   l   |
| 0x6D |   m   |
| 0x6E |   n   |
| 0x6F |   o   |
| 0x70 |   p   |
| 0x71 |   q   |
| 0x72 |   r   |
| 0x73 |   s   |
| 0x74 |   t   |
| 0x75 |   u   |
| 0x76 |   v   |
| 0x77 |   w   |
| 0x78 |   x   |
| 0x79 |   y   |
| 0x7A |   z   |
| 0x7B |   {   |
| 0x7C |   |   |
| 0x7D |   }   |
| 0x7E |   ~   |
| 0x7F |       |
+-------+-------+