ASCII to RGB Converter

import java.awt.Color;
import java.util.ArrayList;
import java.util.Arrays;
public class ASCIItoRGB{

    public static void main(String args[]) {
        String hexExtra = null;
        // Input
        String asciiValue = "This is a test";

        // ASCII to Hex
        char[] c = asciiValue.toCharArray();
        StringBuffer hexValue = new StringBuffer();
        for(int i=0; i<c.length; i++) {
            hexValue.append(Integer.toHexString((int)c[i]));
        }
        String hexString = hexValue.toString();

        // Hex to RGB
        ArrayList<Color> rgbValues = new ArrayList<Color>();
        while(hexString.length() >= 6) {
            String tempval = "#" + hexString.substring(0,5);
            rgbValues.add(Color.decode(tempval));
            hexString = hexString.substring(tempval.length(), hexString.length());
            if(hexString.length() < 6) {
                hexExtra = hexString;
            }
        }
        // Output
        System.out.println("ASCII VALUE: " + asciiValue);
        System.out.println("CHAR ARRAY: " + Arrays.toString(c));
        System.out.println("EXTRA DATA: " + hexExtra);
        System.out.println("HEX VALUE: " + hexValue.toString());
        System.out.println("RGB VALUES: " + rgbValues.toString());

    }
}