内部类中的Scala本机方法
我有: 前两个方法工作得很好,但是内部类上的本机方法给出了内部类中的Scala本机方法,scala,java-native-interface,Scala,Java Native Interface,我有: 前两个方法工作得很好,但是内部类上的本机方法给出了 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: In
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
}
}
线程“main”java.lang.UnsatifiedLinkError中出现异常:pXClient.xClass$Window.drawLine(IIII)V
这里是C++签名
object XApp extends App
{
val xc:XCClass = XCClass()
val win: xc.Window = xc.Window(800, 600)
win.drawLine(20, 20, 40, 40)
readLine()
}
我尝试使用下划线而不是$符号,并且根本没有内部名称,但也失败了
Edit2:在看到Robin的答案之前,我设法让javah开始工作,它给出了答案
extern "C" JNIEXPORT void JNICALL Java_pXClient_XCClass$Window_drawLine(JNIEnv * env, jobject c1, Display *dpy,
Window win, jint x1, jint y1, jint x2, jint y2)
Edit4:一旦我纠正了代码中的错误,它就工作得很好。只要名称正确,JVM就会导入带有错误参数签名的本机函数。我刚刚用
.java
文件和javah
进行了快速测试,$
表示为\u 00024
JNIEXPORT void JNICALL Java_pXClient_XCClass_00024Window_drawLine
(JNIEnv *, jobject, jint, jint, jint, jint);