文章浏览阅读1.9k次。object DateUtils { val DATE_FORMAT = new SimpleDateFormat("yyyy-MM-dd") val DATE_KEY_FORMAT = new SimpleDateFormat("yyyyMMdd") val TIME_FORMAT = new Simpl..._scala时间工具类...
文章浏览阅读2k次。scala类的序列化A sequence comprehension statement consists of a generator part which generates a list of values from the specified range of inputs and a statement which operates on these generated elements..._scala 序列化...
文章浏览阅读472次。Java内部类从属于外部类的scala内部类从属于对象的。若构建了一个外部类，并new出后，外部类对象的内部类是不同的内容object a { def main(args: Array[String]): Unit = { val outer1 = new Outer("spark") val outer2 = n......
文章浏览阅读430次。使用样本类可以方便得存储和匹配类的内容。你不用new关键字就可以创建它们。scala> case class Calculator(brand: String, model: String)defined class Calculatorscala> val hp20b = Calculator("hp", "20b")hp20b: Calculator ......
