How do you start the Java ME 8.2 Emulator on Linux?

1b492ccd-b4ec-47b4-81a7-98b81f128396

I just found your forum after I already posted my question to StackOverflow.  I think I may get a better response here, though.

Below is the content from that post, but first I'll explain my problem in a little more context.  I'm trying to simply start the Java ME 8.2 Emulator from the linux command line.  I also installed the Eclipse Java ME 8.2 plugins, created a project, etc.  I'm able to use the Java ME SDK 8.2 to create a MIDlet, compile my project, etc... it can seed all the default CLDC/MEEP Emulated Device configurations through eclipse.  I just can't start the emulator from the command line, nor from eclipse.   I'm eventually going to target a raspberry pi 2, but right now I just want to prove out a hello-world through the emulator.

The error is:

$> emulator -Xjam -Xdevice:EmbeddedDevice1

*** Error ***
Failed to connect to device 0!
Reason:
Emulator 0 terminated while waiting for it to register!

Here is the content of my cross-posted question:

I just downloaded and installed the Java ME platform SDK 8.2. I'm trying to start the emulator and it won't run. The error is:

<span class="typ">Java_ME_platform_SDK_8</span><span class="pun">.</span><span class="lit">2</span><span class="pun">/</span><span class="pln">bin $</span><span class="pun">></span><span class="pln"> emulator </span><span class="pun">-</span><span class="typ">Xjam</span><span class="pln"> </span><span class="pun">-</span><span class="typ">Xdevice</span><span class="pun">:</span><span class="typ">EmbeddedDevice1</span><span class="pln">  </span>
<span class="pln"></span><span class="pun">***</span><span class="pln"> </span><span class="typ">Error</span><span class="pln"> </span><span class="pun">***</span><span class="pln"> </span>
<span class="pln"></span><span class="typ">Failed</span><span class="pln"> to connect to device </span><span class="lit">0</span><span class="pun">!</span><span class="pln"> </span>
<span class="pln"></span><span class="typ">Reason</span><span class="pun">:</span><span class="pln"> </span>
<span class="pln"></span><span class="typ">Emulator</span><span class="pln"> </span><span class="lit">0</span><span class="pln"> terminated </span><span class="kwd">while</span><span class="pln"> waiting </span><span class="kwd">for</span><span class="pln"> it to </span><span class="kwd">register</span><span class="pun">!</span>

I'm running on

<span class="typ">Linux</span><span class="pln"> </span><span class="lit">2.6</span><span class="pun">.</span><span class="lit">32</span><span class="pun">-</span><span class="lit">504.23</span><span class="pun">.</span><span class="lit">4.el6.x86</span><span class="pln">_64 </span><span class="pun">#</span><span class="lit">1</span><span class="pln"> SMP x86_64 GNU</span><span class="pun">/</span><span class="typ">Linux</span><span class="pln"> </span><span class="typ">CentOS</span><span class="pln"> release </span><span class="lit">6.6</span><span class="pln"> </span><span class="pun">(</span><span class="typ">Final</span><span class="pun">)</span>

I'm trying to follow Oracle's Using the Emulator guide, and it doesn't look like it should be difficult. It looks like should just install the SDK, then run the emulator as I did... it just doesn't work.

I also did the following:

• turned off my firewall
• verified nothing was running on port 1299
• verified my device-manager.object-registry.host=127.0.0.1
• put the <span class="typ">Java_ME_platform_SDK_8</span><span class="pun">.</span><span class="lit">2</span><span class="pun">/</span><span class="pln">bin</span> directory at the beginning of my path
• set JAVA_HOME to my javamesdk_installdir

The Device Selector UI and the Device Connections Manager UI both start without a problem, and I'm able to see the pre-configured devices, like EmbeddedDevice1.

I also have a plain Java SDK installed on the machine

<span class="pln">java version </span><span class="str">"1.8.0_60"</span><span class="pln"> </span><span class="typ">Java</span><span class="pun">(</span><span class="pln">TM</span><span class="pun">)</span><span class="pln"> SE </span><span class="typ">Runtime</span><span class="pln"> </span><span class="typ">Environment</span><span class="pln"> </span><span class="pun">(</span><span class="pln">build </span><span class="lit">1.8</span><span class="pun">.</span><span class="lit">0_60</span><span class="pun">-</span><span class="pln">b27</span><span class="pun">)</span><span class="pln"> </span><span class="typ">Java</span><span class="pln"> </span><span class="typ">HotSpot</span><span class="pun">(</span><span class="pln">TM</span><span class="pun">)</span><span class="pln"> </span><span class="lit">64</span><span class="pun">-</span><span class="typ">Bit</span><span class="pln"> </span><span class="typ">Server</span><span class="pln"> VM </span><span class="pun">(</span><span class="pln">build </span><span class="lit">25.60</span><span class="pun">-</span><span class="pln">b23</span><span class="pun">,</span><span class="pln"> mixed mode</span><span class="pun">)</span>

Thanks!!

-John

Alexander Burdukov-Oracle

Your Linux is 64-bit, Java ME VM is 32-bit application, so 32-bit support libraries have to be installed before you can use ME SDK. This is actually described in docs: https://docs.oracle.com/javame/8.2/sdk-dev-guide/install.htm#sthref10

Docs has an example how to do it under Ubuntu, but under CentOS this also should not be a problem.

Please, also, note that CentOS is not officially supported platform.