通过py4j使用scala.collection.mutable.ArrayBuffer需要以下步骤:
pip install py4j
。import scala.collection.mutable.ArrayBuffer
class ScalaClass {
def getArrayBuffer(): ArrayBuffer[Int] = {
val arrayBuffer = new ArrayBuffer[Int]()
arrayBuffer += 1
arrayBuffer += 2
arrayBuffer += 3
arrayBuffer
}
}
import py4j.GatewayServer
object Main {
def main(args: Array[String]): Unit = {
val scalaObject = new ScalaClass()
val server = new GatewayServer(scalaObject)
server.start()
}
}
from py4j.java_gateway import JavaGateway
# 连接到本地GatewayServer
gateway = JavaGateway()
# 获取Scala类的实例
scala_object = gateway.entry_point.getScalaObject()
# 调用Scala方法来获取ArrayBuffer
array_buffer = scala_object.getArrayBuffer()
# 打印ArrayBuffer的内容
for element in array_buffer:
print(element)
通过上述步骤,可以通过py4j使用scala.collection.mutable.ArrayBuffer。请注意,这里的示例代码仅用于演示目的,实际应用中可能需要更复杂的代码和错误处理。另外,关于py4j的更多用法和细节,请参阅py4j官方文档。
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