Main class not found when trying to launch my kindlet

sega dude · 07-15-2016, 01:07 PM

Edit: I figured out what the problem was. It was because I was compiling the class with JavaSE-1.8 in Eclipse. This lead to a java.lang.UnsupportedClassVersionError. So I changed the JRE System Library to J2SE-1.5. Now it runs just fine. I found all this out by looking at the crash.log file.

I made a kindlet using a combonation of this tutorial and this tutorial. When I put it on my jailbroken K4 after signing it, I get a Main class not found error when I try to launch it.

This is what my mainifest looks like:

Code:

Manifest-Version: 1.0
Main-Class: testProject.segadude.test.Main
Implementation-Title: Hello
Implementation-Version: 1
Implementation-Vendor: segadude
Extension-List: SDK
SDK-Extension-Name: com.amazon.kindle.kindlet
SDK-Specification-Version: 1.3
Toolbar-Mode: persistent
Font-Size-Mode: point

I created the manifest and jar with Eclipse. I used the hello world example code in the second tutorial I linked. My main class is where it says it is when I look into the jar, so I don't understand why I am getting this error.

encol · 07-16-2016, 03:54 AM

Quote:

Originally Posted by sega dude

Edit: I figured out what the problem was. It was because I was compiling the class with JavaSE-1.8 in Eclipse. This lead to a java.lang.UnsupportedClassVersionError. So I changed the JRE System Library to J2SE-1.5. Now it runs just fine. I found all this out by looking at the crash.log file.

I had a similar problem time ago. Where i have to look for the crash.log file when i write a kindlet?

sega dude · 07-17-2016, 11:01 PM

Quote:

Originally Posted by encol

I had a similar problem time ago. Where i have to look for the crash.log file when i write a kindlet?

It's in "\developer\<Implementation-Title in manifest>\work". Since I have "Hello" as the Implementation-Title in my manifest, it was in "\developer\Hello\work" for me. The developer folder is in the root on the kindle drive.

encol · 07-18-2016, 05:20 PM

Thanks for the info

07-15-2016, 01:07 PM	#1
sega dude Junior Member Posts: 9 Karma: 30452 Join Date: Aug 2013 Device: Nook Simple Touch with GlowLight, K4 NoTouch	Main class not found when trying to launch my kindlet Edit: I figured out what the problem was. It was because I was compiling the class with JavaSE-1.8 in Eclipse. This lead to a java.lang.UnsupportedClassVersionError. So I changed the JRE System Library to J2SE-1.5. Now it runs just fine. I found all this out by looking at the crash.log file. I made a kindlet using a combonation of this tutorial and this tutorial. When I put it on my jailbroken K4 after signing it, I get a Main class not found error when I try to launch it. This is what my mainifest looks like: Code: Manifest-Version: 1.0 Main-Class: testProject.segadude.test.Main Implementation-Title: Hello Implementation-Version: 1 Implementation-Vendor: segadude Extension-List: SDK SDK-Extension-Name: com.amazon.kindle.kindlet SDK-Specification-Version: 1.3 Toolbar-Mode: persistent Font-Size-Mode: point I created the manifest and jar with Eclipse. I used the hello world example code in the second tutorial I linked. My main class is where it says it is when I look into the jar, so I don't understand why I am getting this error. Last edited by sega dude; 07-15-2016 at 02:00 PM. Reason: Figured out problem

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07-18-2016, 05:20 PM	#4
encol Evangelist Posts: 416 Karma: 765432 Join Date: Apr 2016 Location: Italy Device: Kindle PW3 5.8.5.0.1	Thanks for the info

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