Rootbeer runtime error, how to fix?

问题:

I'm learning to use Rootbeer, so I did the following things :

[1] Downloaded Rootbeer-1.2.3.jar

[2] Installed CUDA Toolkit and CUDA Driver from : http://www.nvidia.com/content/cuda/cuda-downloads.html

[3] Compiled the following sample program.

[4] Ran ArrayMultApp from NetBeans 8.0.2

import java.util.List; import java.util.ArrayList; import org.trifort.rootbeer.runtime.Kernel; import org.trifort.rootbeer.runtime.Rootbeer;  public class ArrayMultApp {   public void multArray(int[] array)   {     List<Kernel> jobs=new ArrayList();     for (int i=0;i<array.length;++i) jobs.add(new ArrayMult(array,i));     Rootbeer rootbeer=new Rootbeer();     rootbeer.run(jobs);   }    public static void main(String[] args)   {     ArrayMultApp app=new ArrayMultApp();     int[] array=new int[10];     for (int i=0;i<array.length;++i) array[i]=i;     for (int i=0;i<array.length;++i) System.out.println("start array["+i+"]: "+array[i]);     app.multArray(array);     for (int i=0;i<array.length;++i) System.out.println("final array["+i+"]: "+array[i]);   } }  class ArrayMult implements Kernel {   private int[] m_source;   private int m_index;    public ArrayMult(int[] source,int index)   {     m_source=source;     m_index=index;   }    public void gpuMethod()   {     m_source[m_index]*=11;   } }

But I got the following error message :

start array[0]: 0 start array[1]: 1 start array[2]: 2 start array[3]: 3 start array[4]: 4 start array[5]: 5 start array[6]: 6 start array[7]: 7 start array[8]: 8 start array[9]: 9 Exception in thread "main" java.lang.ClassCastException: ArrayMult cannot be cast to org.trifort.rootbeer.runtime.CompiledKernel     at org.trifort.rootbeer.runtime.CUDAContext.setKernel(CUDAContext.java:119)Java Result: 1

I have Intel Core i7 x 980, NVIDA GeForce GTX 780, and Java 8 on Win 7 64 bit.

I copied the sample app from the Rootbeer site, why did I get the error message, and how to fix it ?

Edit : I forgot to mention one thing, during the installation, it said I didn't have Microsoft Visual Studio, something like that and said some parts about that was not installed, I thought I'm a Java developer, I don't need Visual Studio and I didn't mind not having those parts, could that be the problem ? Does that mean I have to buy and install Microsoft Visual Studio first before I can use Rootbeer for Java development ?

I followed instructions to go into [ C:\ProgramData\NVIDIA Corporation\CUDA Samples\v6.5\bin\win64\Release> ] and ran a lot of tests, they all work fine and I can see images being processed in small windows correctly.

When I tried to jar it, I got the following error :

C:\Dir_Rootbeer_Samples\dist>java -jar lib/Rootbeer-1.2.3.jar Rootbeer_Samples.jar Rootbeer_Samples-GPU.jar warning: sm_12 and sm_11 not supported with recursion. use -norecursion to enable. warning: sm_12 and sm_11 not supported with doubles. use -nodoubles to enable. caching package names for: C:\Dir_Rootbeer_Samples\dist\Rootbeer_Samples.jar cpool == null java.lang.NullPointerException         at soot.rbclassload.RootbeerClassLoader.loadHierarchySootClasses(RootbeerClassLoader.java:963)         at soot.rbclassload.RootbeerClassLoader.loadNecessaryClasses(RootbeerClassLoader.java:294)         at org.trifort.rootbeer.entry.RootbeerCompiler.setupSoot(RootbeerCompiler.java:198)         at org.trifort.rootbeer.entry.RootbeerCompiler.compile(RootbeerCompiler.java:219)         at org.trifort.rootbeer.entry.RootbeerCompiler.compile(RootbeerCompiler.java:213)         at org.trifort.rootbeer.entry.Main.run(Main.java:208)         at org.trifort.rootbeer.entry.Main.main(Main.java:244) caching package names for: C:\Dir_Rootbeer_Samples\dist\lib\Rootbeer-1.2.3.jar caching package names for: C:\Program Files\Java\jre1.8.0_20\lib\rt.jar cpool == null java.lang.NullPointerException         at soot.rbclassload.RootbeerClassLoader.loadHierarchySootClasses(RootbeerClassLoader.java:963)         at soot.rbclassload.RootbeerClassLoader.loadNecessaryClasses(RootbeerClassLoader.java:294)         at org.trifort.rootbeer.entry.RootbeerCompiler.setupSoot(RootbeerCompiler.java:198)         at org.trifort.rootbeer.entry.RootbeerCompiler.compile(RootbeerCompiler.java:219)         at org.trifort.rootbeer.entry.RootbeerCompiler.compile(RootbeerCompiler.java:213)         at org.trifort.rootbeer.entry.Main.run(Main.java:208)         at org.trifort.rootbeer.entry.Main.main(Main.java:244) caching package names for: Rootbeer_Samples.jar cpool == null java.lang.NullPointerException         at soot.rbclassload.RootbeerClassLoader.loadHierarchySootClasses(RootbeerClassLoader.java:963)         at soot.rbclassload.RootbeerClassLoader.loadNecessaryClasses(RootbeerClassLoader.java:294)         at org.trifort.rootbeer.entry.RootbeerCompiler.setupSoot(RootbeerCompiler.java:198)         at org.trifort.rootbeer.entry.RootbeerCompiler.compile(RootbeerCompiler.java:219)         at org.trifort.rootbeer.entry.RootbeerCompiler.compile(RootbeerCompiler.java:213)         at org.trifort.rootbeer.entry.Main.run(Main.java:208)         at org.trifort.rootbeer.entry.Main.main(Main.java:244) remapping class: java.util.concurrent.atomic.AtomicLong java.lang.NullPointerException         at soot.rbclassload.RootbeerClassLoader.remapClasses(RootbeerClassLoader.java:998)         at soot.rbclassload.RootbeerClassLoader.loadNecessaryClasses(RootbeerClassLoader.java:295)         at org.trifort.rootbeer.entry.RootbeerCompiler.setupSoot(RootbeerCompiler.java:198)         at org.trifort.rootbeer.entry.RootbeerCompiler.compile(RootbeerCompiler.java:219)         at org.trifort.rootbeer.entry.RootbeerCompiler.compile(RootbeerCompiler.java:213)         at org.trifort.rootbeer.entry.Main.run(Main.java:208)         at org.trifort.rootbeer.entry.Main.main(Main.java:244)  C:\Dir_Rootbeer_Samples\dist>

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