import scala.collection.mutable.ArrayBuffer

object 变长数组 {

  def main(args: Array[String]): Unit = {
    // 创建方式1
    val arr1 = ArrayBuffer[Int]()
    // 创建方式2
    val arr2 = ArrayBuffer("Hadoop", "Spark", "Flink")
    println(s"arr1:${arr1}")
    println(s"arr2:${arr2}")
  }

}