# Error: The package “javax.xml.bind” does not exist. You might be missing a library

**URL:** <https://discourse.processing.org/t/error-the-package-javax-xml-bind-does-not-exist-you-might-be-missing-a-library/47360>\
**Category:** Libraries\
**Created:** [October 14, 2025, 1:30pm UTC](https://discourse.processing.org/t/error-the-package-javax-xml-bind-does-not-exist-you-might-be-missing-a-library/47360 "2025-10-14T13:30:50Z")\
**Posts on this page:** 10\
**Page:** 1

<div class="post-metadata">

**Author:** ![Bua](https://avatars.discourse-cdn.com/v4/letter/b/87869e/32.png) [@Bua](https://discourse.processing.org/u/Bua)\
**Post date:** [October 14, 2025, 1:30pm UTC](https://discourse.processing.org/t/error-the-package-javax-xml-bind-does-not-exist-you-might-be-missing-a-library/47360/1 "2025-10-14T13:30:50Z")

</div>

```auto
Hi, this is an example to connect an Arduino-BLE33 Nano to www.teachablemachine.withgoogle.com and called TM_Collector.
I want to transfer Image-data with the virtuell COM to the processing TM_Connector application...
The library javax.xml.bind.DatatypeConverter of this application is imported in code but the Error says it does not exist...

import processing.serial.*;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import websockets.*;
import javax.xml.bind.DatatypeConverter;
import controlP5.*;
import java.util.*;

```

I hope, you can help by this problem.

Thnaks

---

<div class="post-metadata">

**Author:** ![moon](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/moon/32/21773_2.png) [@moon](https://discourse.processing.org/u/moon)\
**Post date:** [October 14, 2025, 2:22pm UTC](https://discourse.processing.org/t/error-the-package-javax-xml-bind-does-not-exist-you-might-be-missing-a-library/47360/2 "2025-10-14T14:22:49Z")

</div>

Hi! It sounds like you might be running version 4.4.8.

There is a bug that we are getting sorted out and hoping to release a fix for soon in 4.4.9.

Will keep you posted on our progress. Thank you

moon

---

<div class="post-metadata">

**Author:** ![glv](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/glv/32/18785_2.png) [@glv](https://discourse.processing.org/u/glv)\
**Post date:** [October 14, 2025, 2:42pm UTC](https://discourse.processing.org/t/error-the-package-javax-xml-bind-does-not-exist-you-might-be-missing-a-library/47360/3 "2025-10-14T14:42:17Z")

</div>

Hello @Bua,

Welcome to forum!

The code should be separate from the discussion in the post so it is easy to read and a simple click of the mouse to copy the code.

It is also important to provide details:

- Operating system
- Processing version
- Any other important details to reproduce the error.

I quoted this from your post:

> Hi, this is an example to connect an Arduino-BLE33 Nano to _ **LINK REMOVED** _ and called TM\_Collector.  
> I want to transfer Image-data with the virtuell COM to the processing TM\_Connector application…  
> The library javax.xml.bind.DatatypeConverter of this application is imported in code but the Error says it does not exist…

_ **I removed the link because my browsers did not allow me to view it.** _  
There is a working link to a related GitHub topic in one of the references below.

Code provided:

```processing
import processing.serial.*;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import websockets.*;
import javax.xml.bind.DatatypeConverter;
import controlP5.*;
import java.util.*;

```

You did not provide enough code to reproduce the error.

I will be using Processing 4.4.7 and Windows 10 for this discussion.

Related discussions:

- [Error with importing javax.xml.bind.DatatypeConverter](https://discourse.processing.org/t/error-with-importing-javax-xml-bind-datatypeconverter/43019)  
This is an example of incorrect formatting. _ **I do not copy and correct these.** _  
The solution does correct one error in the topic.
- [https://stackoverflow.com/questions/77415485/processing-4-3-issue-the-package-javax-xml-bind-does-not-exist-you-might-b](https://stackoverflow.com/questions/77415485/processing-4-3-issue-the-package-javax-xml-bind-does-not-exist-you-might-b)  
This appears to be the code you are using and I will use this in this topic.  
Keep in mind that this is an old post (almost 2 years ago) and may be a solution for the version of Processing used at that time.

Using code from last reference above I get this:

 ![image](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/3X/2/b/2bfa62dd1191bfed4e5384de48483103f0f2bb06.png)

Note:  
The error in _RED_ did NOT appear right away and I had to scroll down and select it for details.  
Under the error there is code that is commented that _ **MAY** _ be a correction based on the some of the references listed and testing.  
_I was only testing so you have to scrutinize this and correct as required._

The warning in _ **BLUE** _ is something new… the code still ran.  
Research suggests it a warning and not typically a critical issue.  
I can’t comment or explore this further at this time.

And the sketch launched:

 ![image](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/3X/6/9/69c7e5a3f86f51df2ecc1de14ee486750def91fd.png)

The details are important.

Have fun!

`:)`

---

<div class="post-metadata">

**Author:** ![Bua](https://avatars.discourse-cdn.com/v4/letter/b/87869e/32.png) [@Bua](https://discourse.processing.org/u/Bua)\
**Post date:** [October 14, 2025, 3:00pm UTC](https://discourse.processing.org/t/error-the-package-javax-xml-bind-does-not-exist-you-might-be-missing-a-library/47360/4 "2025-10-14T15:00:27Z")

</div>

Oh Sorry,

I tried this with 4.4.8 and 4.4.7 with Windows11

I hope, it will help

Thanks

---

<div class="post-metadata">

**Author:** ![glv](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/glv/32/18785_2.png) [@glv](https://discourse.processing.org/u/glv)\
**Post date:** [October 14, 2025, 8:23pm UTC](https://discourse.processing.org/t/error-the-package-javax-xml-bind-does-not-exist-you-might-be-missing-a-library/47360/5 "2025-10-14T20:23:54Z")

</div>

> [@Bua](#):
>
> I tried this with 4.4.8 and 4.4.7 with Windows11

\*\*\* UPDATE \*\*\*

This ([code here](https://stackoverflow.com/questions/77415485/processing-4-3-issue-the-package-javax-xml-bind-does-not-exist-you-might-b)) seems to work with Processing 4.4.7 and Processing 4.4.10 as is without any changes and no errors! I am using W10.

Lesson learned!  
I must be more meticulous and thorough when testing.

I am still going to go back to understand what happened and why that red underlined error was present before with Processing 4.4.7 (bottom right of image) !

Have fun!

`:)`

---

<div class="post-metadata">

**Author:** ![glv](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/glv/32/18785_2.png) [@glv](https://discourse.processing.org/u/glv)\
**Post date:** [October 15, 2025, 6:10pm UTC](https://discourse.processing.org/t/error-the-package-javax-xml-bind-does-not-exist-you-might-be-missing-a-library/47360/6 "2025-10-15T18:10:53Z")

</div>

> [@glv](#):
>
> I am still going to go back to understand what happened and why that red underlined error was present before with Processing 4.4.7 (bottom right of image) !

I sorted this out!  
I have many libraries installed and they were providing the missing pieces.

This works with the ArtNet library installed _but is still underlined in Red as in previous post_:

```processing

import javax.xml.bind.DatatypeConverter; // Works with ArtNet library installed
//import java.util.*;

final int cameraWidth = 8;
final int cameraHeight = 8;
final int cameraBytesPerPixel = 1;
final int bytesPerFrame = cameraWidth * cameraHeight * cameraBytesPerPixel;

PImage myImage;
byte[] frameBuffer = new byte[bytesPerFrame];

void setup()
  {      
  // Generate a framebuffer for testing  
  for (int i = 0; i < bytesPerFrame; i++) 
    {
    //frameBuffer[i] = (byte) (choice(0, 256) % 256); // Choice returns 0 to 255 random
    frameBuffer[i] = (byte) (i%256); // Generate some data (0, 1, 2, ..., 255)
    }  
       
  // Works with: 
  // import javax.xml.bind.DatatypeConverter;   
  // Arnet Library installed.
  String data1 = DatatypeConverter.printBase64Binary(frameBuffer);
  
  printData(data1);
  } 
  
void printData(String data)
  { 
  println(data.length());
  for(int i=0; i<data.length(); i++)
    {    
    if (i%64 == 0) println();
    print(data.charAt(i)); // Too long!
    }
  println();  
  }

```

This is the recommended solution:

```processing
//import javax.xml.bind.DatatypeConverter; 
import java.util.*;

final int cameraWidth = 8;
final int cameraHeight = 8;
final int cameraBytesPerPixel = 1;
final int bytesPerFrame = cameraWidth * cameraHeight * cameraBytesPerPixel;

PImage myImage;
byte[] frameBuffer = new byte[bytesPerFrame];

void setup()
  {    
  
  // Generate a framebuffer for testing  
  for (int i = 0; i < bytesPerFrame; i++) 
    {
    //frameBuffer[i] = (byte) (choice(0, 256) % 256); // Choice returns 0 to 255 random
    frameBuffer[i] = (byte) (i%256); // Generate some data (0, 1, 2, ..., 255)
    }  
           
  // Works with: 
  // import java.util.*;;   
  // Arnet Library library not required.  
  String data2 = Base64.getEncoder().encodeToString(frameBuffer);
  
  println();
  printData(data2);
  } 
  
void printData(String data)
  { 
  println(data.length());
  for(int i=0; i<data.length(); i++)
    {    
    if (i%64 == 0) println();
    print(data.charAt(i)); // Too long!
    }
  println();  
  }

```

I asked Google Gemini to summarize for a post:

> ## JAXB is Not Available in Current Processing Versions
> 
> The class your code uses, `javax.xml.bind.DatatypeConverter`, is **not available in recent versions of Processing** because it was **removed from the standard Java Development Kit (JDK) starting with Java 11**.
> 
> This occurred because the **Java Architecture for XML Binding (JAXB)** framework was separated from the core Java SE (Standard Edition) platform that Processing uses, as JAXB was part of the older Java EE (Enterprise Edition) platform.
> 
> * * *
> 
> ### Accidental Solution: Why the Library Made it Work
> 
> Your code worked because the installed, but unused, **ArtNet library provided the missing file** through an **unintended side effect** (or transitive dependency).
> 
> 1. **Classpath Loading:** When you install the ArtNet library, the Processing IDE automatically adds the library’s files and **all of its dependencies** (the JAR files it needs to run) to your project’s **Classpath** (the list of locations Java searches for classes).
> 2. **The Hidden Dependency:** Since the ArtNet library itself relies on **XML Binding (JAXB)**, installing it places the necessary **JAXB JAR file** (containing `DatatypeConverter`) onto your Classpath.
> 3. **Code Execution:** The Java Virtual Machine simply finds the missing JAXB class inside the ArtNet dependency JAR and successfully runs your code.
> 
> In short, the ArtNet library accidentally solved your problem by adding the correct missing piece of Java’s deprecated technology to your search path.
> 
> * * *
> 
> ### Recommended Solution
> 
> Relying on an unrelated library to fix a dependency issue is unreliable. The proper solution is to use a method for Base64 encoding that is natively supported by modern Java and, therefore, by current versions of Processing: **`java.util.Base64`**.
> 
> You were already using the better method in your example code (`data2`). Switch your implementation to rely solely on this, and you can remove the problematic `DatatypeConverter` import and the installed ArtNet library if you don’t actually need it.

I was able to verify above by examining the _artnet4j.jar_ file:

 ![image](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/3X/5/2/527b236a70480819d320e022d6574b211feeff31.png)

In the future I will _isolate projects_ into their own _sketchbook folder_ with only the _required libraries_ for testing.

 ![image](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/3X/2/c/2c252e837ffbc81adfa6fcfb64532dea7efcbae8.png)

`:)`

---

<div class="post-metadata">

**Author:** ![Bua](https://avatars.discourse-cdn.com/v4/letter/b/87869e/32.png) [@Bua](https://discourse.processing.org/u/Bua)\
**Post date:** [October 16, 2025, 6:42am UTC](https://discourse.processing.org/t/error-the-package-javax-xml-bind-does-not-exist-you-might-be-missing-a-library/47360/7 "2025-10-16T06:42:23Z")

</div>

Hi,

thanks a lot for help :-).

But also these ideas are not working by processing 4.4.7 and 4.4.8 with win11. I want to use this with my students, so I need a running system🤷‍♀️.

May be you find a solution …

---

<div class="post-metadata">

**Author:** ![glv](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/glv/32/18785_2.png) [@glv](https://discourse.processing.org/u/glv)\
**Post date:** [October 16, 2025, 2:32pm UTC](https://discourse.processing.org/t/error-the-package-javax-xml-bind-does-not-exist-you-might-be-missing-a-library/47360/8 "2025-10-16T14:32:48Z")

</div>

> [@Bua](#):
>
> May be you find a solution …

I found a solution (discussed in previous posts) that works for me on:

- W10
- W11
- Processing 4.4.7
- Processing 4.4.10

Code source:

_[teachablemachine-community/snippets/markdown/tiny\_image/tiny\_templates/TMConnector/TM\_Connector/TM\_Connector.pde at master · googlecreativelab/teachablemachine-community · GitHub](https://github.com/googlecreativelab/teachablemachine-community/blob/master/snippets/markdown/tiny_image/tiny_templates/TMConnector/TM_Connector/TM_Connector.pde)_

Changes made:

```auto
// Do not use:
//import javax.xml.bind.DatatypeConverter;

// Do not use:
//String data = DatatypeConverter.printBase64Binary(frameBuffer);

// Use this:
String data = Base64.getEncoder().encodeToString(frameBuffer);

```

> [@glv](#):
>
> In the future I will _isolate projects_ into their own _sketchbook folder_ with only the _required libraries_ for testing.

Use a separate _Sketchbook folder_ and add only the libraries required:

 ![image](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/3X/2/c/2c252e837ffbc81adfa6fcfb64532dea7efcbae8.png)

 ![image](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/3X/d/0/d0781cc43ca43f71453699eee34433c7feea76e0.png)

The other libraries are included with Processing and do not have to be added.

I encourage you and your students to read the guidelines:

> [@Welcome to the Processing Foundation Discourse](https://discourse.processing.org/t/welcome-to-the-processing-foundation-discourse/8):
>
> This is a place to discuss [Processing](https://processing.org/), [p5.js](https://p5js.org/), [Processing for Android](http://android.processing.org/), Processing for Pi, [Processing.py](http://py.processing.org/) and related software initiatives. It’s a place to talk about general ideas and specific projects. You can learn more about the [Processing Foundation](https://processingfoundation.org/) on its website. Our goal is to promote software literacy within the visual arts, and visual literacy within technology-related fields — and to make these fields accessible to diverse communities. Our goal is to empower people of all interests and …

The section on _Asking Questions_ may be helpful!

I will assist you if follow the guidelines with future questions and only work with Processing 4.4.7 or the latest Processing 4.4.10.

Have fun!

`:)`

---

<div class="post-metadata">

**Author:** ![Bua](https://avatars.discourse-cdn.com/v4/letter/b/87869e/32.png) [@Bua](https://discourse.processing.org/u/Bua)\
**Post date:** [October 16, 2025, 5:43pm UTC](https://discourse.processing.org/t/error-the-package-javax-xml-bind-does-not-exist-you-might-be-missing-a-library/47360/9 "2025-10-16T17:43:36Z")

</div>

Thanks a lot; it works 🙂

---

<div class="post-metadata">

**Author:** ![glv](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/glv/32/18785_2.png) [@glv](https://discourse.processing.org/u/glv)\
**Post date:** [October 27, 2025, 4:36pm UTC](https://discourse.processing.org/t/error-the-package-javax-xml-bind-does-not-exist-you-might-be-missing-a-library/47360/10 "2025-10-27T16:36:10Z")

</div>

Hello again!

This happened to me again with another library!

I used a Powershell script to find it!

An example to find “bind/” in the library files:

```auto
PS D:\Users\GLV\Documents\P4\libraries> Get-ChildItem -Path . -Filter "*.jar" -Recurse | ForEach-Object { $jarPath = $_.FullName; try { jar tvf $jarPath | Select-String "bind/" -Quiet | ForEach-Object { Write-Host "FOUND IN: $jarPath" } } catch {} }

FOUND IN: D:\Users\GLV\Documents\P4\libraries\artnet4j\library\artnet4j.jar

```

`:)`