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  I'm having problems with Rebirth...  (Read 1234 times)
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Offline Sickan

Senior Member


Medals: 7
« Posted 2012-06-28 00:49:13 »
I'm currently using the Rebirth library, and I'm getting the following error message.

Exception in thread "main" java.lang.NullPointerException
   at nordgren.silas.happyisles.HappyIsles.init(HappyIsles.java:35)
   at nordgren.silas.happyisles.HappyIsles.main(HappyIsles.java:51)

The code is as follows:

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public static ResourceHandle<AudioUtilities> audioUtilitiesHandle;
   public static ResourceHandle<VideoUtilities> videoUtilitiesHandle;
   public static ResourcePool resources = Resources.createPool(USER_DIRECTORY
         + FILE_SEPARATOR + "content", DecoderGroup.CORE, true, false,
         new AudioDecoder(), new VideoDecoder());


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resources.parse("resources.xml");

      audioUtilitiesHandle = resources.forceCreate(
            AudioUtilities.class, "main");
      videoUtilitiesHandle = resources.forceCreate(
            VideoUtilities.class, "main");

      audioUtilities = audioUtilitiesHandle.get(); //I get a nullpointer exception here, I believe it is because audioUtilitiesHandle is null.
      videoUtilities = videoUtilitiesHandle.get();


Thank you for your time assisting this initiate to Rebirth.
I'm just here to learn.
Online Jimmt

JGO Wizard


Medals: 54
Projects: 4
« Reply #1 - Posted 2012-06-28 02:36:29 »
ReBirth, get over here...the library is named after you Grin
Offline Sickan

Senior Member


Medals: 7
« Reply #2 - Posted 2012-06-28 10:33:15 »
It's wierd because I've never got errors with Rebirth before, and I've done the same thing on other projects with no problems. Here are the XML files in case there's anything wrong with them.

Resources.xml
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<resources>
   <include path="resources/AudioUtilities.xml" />
   <include path="resources/VideoUtilities.xml" />
</resources>


resources/AudioUtilities.xml
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<resources>
   <map name="AudioUtilities" class="nordgren.silas.happyisles.utilities.AudioUtilities" />
   <AudioUtilities name="main"
   />
</resources>


resources/VideoUtilities.xml
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<resources>
   <map name="VideoUtilities" class="nordgren.silas.happyisles.utilities.VideoUtilities" />
   <VideoUtilities name="main"
   bitsPerPixel="32"
   monitorFrequency="60"
   windowHeight="600"
   windowTitle="Happy Isles"
   windowWidth="800"
   />
</resources>
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Offline ReBirth

JGO Wizard


Medals: 66
Projects: 4
« Reply #3 - Posted 2012-06-28 13:40:08 »
Quote from: Jimmt on 2012-06-28 02:36:29
ReBirth, get over here...the library is named after you Grin
I thought someone is going to pick fight with me, oh well *hides scope*

I don't know if it's problem to let AudioUtilities's property to empty, but do you call resources.update()? First exception appeared before VideoUtilities, so maybe it'll suffer same problem.
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Offline Sickan

Senior Member


Medals: 7
« Reply #4 - Posted 2012-06-28 18:48:48 »
Quote from: ReBirth on 2012-06-28 13:40:08
Quote from: Jimmt on 2012-06-28 02:36:29
ReBirth, get over here...the library is named after you Grin
I thought someone is going to pick fight with me, oh well *hides scope*

I don't know if it's problem to let AudioUtilities's property to empty, but do you call resources.update()? First exception appeared before VideoUtilities, so maybe it'll suffer same problem.
Thank you! The error was gone when I commented out the AudioUtilities loading part. Currently it's just a placeholder for the variables I'm going to place there soon enough.
I'm just here to learn.
Offline Orangy Tang

JGO Kernel


Medals: 48
Projects: 11


Monkey for a head
« Reply #5 - Posted 2012-06-28 19:14:49 »
Quote from: Sickan on 2012-06-28 10:33:15
resources/AudioUtilities.xml
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<resources>
   <map name="AudioUtilities" class="nordgren.silas.happyisles.utilities.AudioUtilities" />
   <AudioUtilities name="main"
   />
</resources>


resources/VideoUtilities.xml
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<resources>
   <map name="VideoUtilities" class="nordgren.silas.happyisles.utilities.VideoUtilities" />
   <VideoUtilities name="main"
   bitsPerPixel="32"
   monitorFrequency="60"
   windowHeight="600"
   windowTitle="Happy Isles"
   windowWidth="800"
   />
</resources>


Resource names need to be globally unique, and you have two resources with different types both called "main". I should probably put some code in to barf on loading if you try and reuse a name.

I generally put an extension of the type at the end of resource names (eg. "main.audioUtils" and "main.videoUtils").
[ TriangularPixels.com - Play Growth Spurt, Rescue Squad and Snowman Village ] [ Rebirth - game resource library ]
Offline Orangy Tang

JGO Kernel


Medals: 48
Projects: 11


Monkey for a head
« Reply #6 - Posted 2012-06-28 19:15:56 »
Quote from: ReBirth on 2012-06-28 13:40:08
Quote from: Jimmt on 2012-06-28 02:36:29
ReBirth, get over here...the library is named after you Grin
I thought someone is going to pick fight with me, oh well *hides scope*

Rebirth the lib was here first.  Tongue

This topic is kinda funny because I've heard so little feedback about Rebirth (the library) that I'd kinda assumed no-one was using it other than me.
[ TriangularPixels.com - Play Growth Spurt, Rescue Squad and Snowman Village ] [ Rebirth - game resource library ]
Offline Sickan

Senior Member


Medals: 7
« Reply #7 - Posted 2012-06-28 20:52:25 »
Quote from: Orangy Tang on 2012-06-28 19:15:56
Quote from: ReBirth on 2012-06-28 13:40:08
Quote from: Jimmt on 2012-06-28 02:36:29
ReBirth, get over here...the library is named after you Grin
I thought someone is going to pick fight with me, oh well *hides scope*

Rebirth the lib was here first.  Tongue

This topic is kinda funny because I've heard so little feedback about Rebirth (the library) that I'd kinda assumed no-one was using it other than me.
I didn't really realize it at the time I made this topic, but the title isn't really optimal when you have a member with the name ReBirth. Anyway, thanks for the help. Also, loving the library.
I'm just here to learn.
Offline Orangy Tang

JGO Kernel


Medals: 48
Projects: 11


Monkey for a head
« Reply #8 - Posted 2012-06-29 09:31:18 »
Btw could you post your AudioDecoder and VideoDecoder classes? I suspect you could do things in a cleaner way. (Also I'm just nosy how people like to use the api).
[ TriangularPixels.com - Play Growth Spurt, Rescue Squad and Snowman Village ] [ Rebirth - game resource library ]
Offline Sickan

Senior Member


Medals: 7
« Reply #9 - Posted 2012-06-29 09:33:55 »
Quote from: Orangy Tang on 2012-06-29 09:31:18
Btw could you post your AudioDecoder and VideoDecoder classes? I suspect you could do things in a cleaner way. (Also I'm just nosy how people like to use the api).
I just use the plastic solution of specifying the name of the texture or sound I want to load and then let Slick do the rest.
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Offline ReBirth

JGO Wizard


Medals: 66
Projects: 4
« Reply #10 - Posted 2012-06-29 16:15:08 »
Quote from: Sickan on 2012-06-28 20:52:25
I didn't really realize it at the time I made this topic, but the title isn't really optimal when you have a member with the name ReBirth. Anyway, thanks for the help. Also, loving the library.
I guess many members were deceived.

Quote from: Orangy Tang on 2012-06-28 19:15:56
Rebirth the lib was here first.  Tongue

This topic is kinda funny because I've heard so little feedback about Rebirth (the library) that I'd kinda assumed no-one was using it other than me.
Yeah I know Grin I already read how to use it but never really use it. Maybe because I have small amount of resources so I just type them one by one.
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Offline h3ckboy

JGO Knight


Medals: 5
Projects: 1
« Reply #11 - Posted 2012-06-29 19:42:54 »
hahahahaha, I don't know why, but it never clicked for me that ReBirth didnt write reberth.

Which is surprising considering I was hear when orangy tang posted it the first time.

I guess my mind is just failing on me Tongue
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