Rootbeer运行时错误，如何解决？

我正在学习使用Rootbeer，所以我做了以下事情：

[1]下载Rootbeer-1.2.3.jar

[2]安装的CUDA工具包和CUDA驱动程序来自： http ： //www.nvidia.com/content/cuda/cuda-downloads.html

[3]编写了以下示例程序。

[4]来自NetBeans 8.0.2的Ran ArrayMultApp

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 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; } } 

但是我收到以下错误消息：

 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 

我在Win 7 64位上安装了英特尔酷睿i7 x 980，NVIDA GeForce GTX 780和Java 8。

我从Rootbeer站点复制了示例应用程序，为什么我收到错误消息，以及如何解决它？

编辑：我忘了提一件事，在安装过程中，它说我没有Microsoft Visual Studio，就像那样，并说有些部分没有安装，我以为我是Java开发人员，我不知道需要Visual Studio，我不介意没有这些部分，这可能是问题吗？ 这是否意味着我必须首先购买并安装Microsoft Visual Studio才能使用Rootbeer进行Java开发？

我按照说明进入[C：\ ProgramData \ NVIDIA Corporation \ CUDA Samples \ v6.5 \ bin \ win64 \ Release>]并运行了大量测试，它们都工作正常，我可以看到在小窗口中处理图像正确。

当我试图jar它时，我收到以下错误：

 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>