ascii decimal conversion problem

[Scott A Burch]

I need a way to take the output of a JSpinner with a custom value list - 00, 01, 02, etc, to 10 - and convert that to an ASCII decimal sequence. For example, "00" would like "48 48" and so on. I don't know how to do that conversion - a hint or a link would be helpful.

The second part of the problem comes when those new values have to be placed into the second and third slots of the example sequence below:

byte[] arr = {(byte)33, (byte)48, (byte)48, (byte)66, (byte)67, (byte)78, (byte)49, (byte)13};

Any help or advice is always appreciated. Thank you!

[Stephan van Hulst]

This looks like the means towards a goal. What is your goal?

[Scott A Burch]

The goal is to slide that array through a serial port via an outputstream to control an external device. My preliminary model works only when the array is "hard coded". I have to find a way for it to be more flexible so that a user can select a network of devices to control.

[Scott A Burch]

Here's the block in question:

//starts initial communication with monitor chosen
     public void writeToPort()      {       

         //String spinnerStr = (String) jSpinnerMonitorID.getValue();
         

         //byte[] b = {(byte)33, (byte)48, (byte)48, (byte)66, (byte)67, (byte)78, (byte)49, (byte)13};
         //String s = new String(b, "US-ASCII");

         try
        {
            // Copy the contents of spinnerStr to a byte array
            // using the ASCII encoding.
            byte[] arr = {(byte)33, (byte)48, (byte)48, (byte)66, (byte)67, (byte)78, (byte)49, (byte)13};

            // Create a new String using the contents of the byte array.
            String commandStr = new String(arr, "US-ASCII");

                   // write string to serial port
                   outputStream = serialPort.getOutputStream();
                   outputStream.write(arr);
	           jTextArea1.append("Sending control command " + commandStr + "\n");
         }
         
	 catch (IOException e) {
         }
        }

[Paul Clapham]

I am also missing why solving that problem reduces to the question you posted. If it were me I would just put a suitable list of objects into the spinner's model and just use data from those objects. Or something like that... I didn't read your requirement all that closely.

[Rob Spoor]

There are two smaller problems at hand here:
1) getting the JSpinner to show values from 00 to 10.
2) converting the current value to two digits.


For problem 1 you can use a SpinnerListModel if your inputs are limited in number. Otherwise, use a SpinnerNumberModel and a JSpinner.NumberEditor to display the value using two digits, then get the value back and use a NumberFormat to format it to two digits.

For problem 2 you can, with a two character String, simply get the two chars (charAt) and convert them to int to get the ASCII value - as long as the chars are digits of course.

[Jesper de Jong]

Don't double-click the Code button. Make sure your code is between a [code] begin tag and [/code] end tag.

[Scott A Burch]

Thanks for the code tag tip.

My JSpinner actually works fine right now. I am using the ListModel and just populated the list with the items "01" "02" etc, up to "10". Thanks for the info on JSpinner NumberEditor; I was introduced to spinners on the fly for this project.

charAt should do the trick for decimal conversion.

I'll start a new thread for the next problem I have ... ha!

thanks to all again.