内部类中的Scala本机方法

Question

我有:

class XCClass
{   
  @native protected def createWin(displayPtr: Long, width: Int, height: Int, backGroundColour: Int = white.value,
    borderColour: Int = darkblue.value, borderWidth: Int = 0, xPosn: Int = 0, yPosn: Int = 0): Long
  @native protected def xOpen(): Long  
  System.load("/sdat/projects/prXCpp/Release/libprXCpp.so")  
//Code edited out

  class Window(width: Int, height: Int, backGroundColour: ColourInt = white, borderColour: ColourInt = darkblue,
    borderWidth: Int = 0, xPosn: Int = 0, yPosn: Int = 0)
  {
  val xWinPtr = createWin(xServPtr, width, height, backGroundColour.value, borderColour.value, borderWidth, xPosn, yPosn)
  @native def drawLine(x1: Int, y1: Int, x2: Int, y2: Int): Unit
  }
}

前两个方法工作正常,但内部类的本机方法给出

object XApp extends App
{
  val xc:XCClass = XCClass()  
  val win: xc.Window = xc.Window(800, 600)
  win.drawLine(20, 20, 40, 40)
  readLine()  
}

线程"main"中的异常java.lang.UnsatisfiedLinkError:pXClient.XCClass $ Window.drawLine(IIII)V

这是C++签名

extern "C" JNIEXPORT void JNICALL Java_pXClient_XCClass$Window_drawLine(JNIEnv * env, jobject c1, Display *dpy,
    Window win, jint x1, jint y1, jint x2, jint y2)

我尝试使用下划线而不是$符号,并且根本没有内部名称,但也失败了.

编辑2:在看到罗宾的答案之前,我设法让javah工作了

JNIEXPORT void JNICALL Java_pXClient_XCClass_00024Window_drawLine
  (JNIEnv *, jobject, jint, jint, jint, jint);

Edit4:一旦我纠正了代码中的错误,它工作正常.只要名称正确,似乎JVM将使用错误的参数签名导入本机函数.

Answer 1

我只是用.java文件进行了快速测试javah,并且a $表示为_00024.