Scala DecimalFormat类代码示例

//设置package包名称以及导入依赖的类
package com.wix.pay.tranzila.model

import java.text.DecimalFormat

object Conversions {
  private val amountFormat = new DecimalFormat("0.00")

  def toTranzilaAmount(amount: Double): String = {
    amountFormat.format(amount)
  }

  def toTranzilaCurrency(currency: String): String = {
    currency match {
      case "ILS" => Currencies.ILS
      case "USD" => Currencies.USD
      case "GBP" => Currencies.GBP
      case "HKD" => Currencies.HKD
      case "JPY" => Currencies.JPY
      case "EUR" => Currencies.EUR
      case _ => throw new IllegalArgumentException(s"Tranzila doesn't support $currency currency")
    }
  }

  def toTranzilaYearMonth(year: Int, month: Int): String = {
    f"$month%02d${year % 100}%02d"
  }
} 

//设置package包名称以及导入依赖的类
package libgcode

import java.text.{DecimalFormat,DecimalFormatSymbols}
import java.util.Locale

object CmdType extends Enumeration {
  type CmdType = Value
  val G, M, O, T, Empty = Value
}

object ParamType extends Enumeration {
  type ParamType = Value
  val A, B, C, D, E, F, H, I, J, K, L, P, Q, R, S, T, X, Y, Z = Value
}

import CmdType._
import ParamType.{T => PT, _}

// each line is a command
case class Command( ctype: CmdType,             // Empty means it is a comment only
                    code: Seq[Int],             // code X.Y corresponds to Seq(X, Y)
                    parameters: Seq[Param],     // parameters
                    line: Option[Int],          // line number (optional)
                    comment: Option[String])  { // trailing comment

  def replaceComment(c: Option[String]) = {
    if (c == comment) this
    else Command(ctype, code, parameters, line, comment)
  }

}

sealed abstract class Param
case class ParamT(ptype: ParamType) extends Param {
  override def toString = ptype.toString
}
case class RealParam(ptype: ParamType, value: Double) extends Param {
  assert(RealParam.is(ptype), ptype + " is not a real valued parameter")
  override def toString = ptype.toString + RealParam.format(value)
}
case class IntParam(ptype: ParamType, value: Int) extends Param {
  assert(IntParam.is(ptype), ptype + " is not an integer valued parameter")
  override def toString = ptype.toString + value
}

object RealParam {
  val types = Set(A, B, C, D, E, F, H, I, J, K, Q, R, X, Y, Z)
  def is(t: ParamType) = types(t)

  protected val df = new DecimalFormat("0", DecimalFormatSymbols.getInstance(Locale.ENGLISH))
  df.setMaximumFractionDigits(340)
  def format(d: Double) = df.format(d)
}

object IntParam {
  val types = Set(L, P, S, PT)
  def is(t: ParamType) = types(t)
} 

//设置package包名称以及导入依赖的类
package com.github.twinra.fyber.window

import java.text.DecimalFormat

object Formatter {

  val header: String = {
    val space = " "
    val columns = List("T" -> 10, "V" -> 7, "N" -> 2, "RS" -> 8, "MaxV" -> 7, "MinV" -> 7)
    columns.map { case (k, v) => k + space * (v - k.length) }.mkString(space)
  }

  private val formatter = new DecimalFormat("#.#####")
  private def format(v: Double) = formatter.format(v)

  def format(rw: RollingWindow): String = {
    "%d %-7s %-2d %-8s %-7s %-7s".format(
      rw.lastTime,
      format(rw.lastValue),
      rw.measuresNumber,
      format(rw.sum),
      format(rw.min),
      format(rw.max)
    )
  }
} 

//设置package包名称以及导入依赖的类
package DupeMaster

import java.text.DecimalFormat

object FileSizeConverter {
  def apply(baseUnit: Int = 1000, unitChars: String = "kMGTPE", zero: String = "0") = new FileSizeConverter(baseUnit, unitChars, zero)
}


class FileSizeConverter(val baseUnit: Int, val unitChars: String, zero: String) {

  val fileSizeRegex = """(?i)(\d+(?:\.\d+)?)?\s?((k|m|g|t|e)b?)?""".r

  def stringToFileSize(s: String): Long = {
    val (number, unit) = s match {
      case fileSizeRegex(number, unit2, unit) => (number, unit)
      case _ => ("0", null)
    }
    if (number == null) return 0
    val factor = if (unit == null) 1 else math.pow(baseUnit, unitChars.toUpperCase.indexOf(unit.toUpperCase) + 1)
    (math.max(0, number.toDouble * factor)).toLong
  }

  def fileSizeToString(bytes: Long): String = {
    if (bytes < 1) return ""
    if (bytes < baseUnit) return bytes.toString
    val exp = (math.min(6, math.log(bytes) / math.log(baseUnit))).toInt
    (new DecimalFormat("#.##")).format(bytes / Math.pow(baseUnit, exp)) + s" ${unitChars.charAt(exp - 1)}B"
  }

} 

//设置package包名称以及导入依赖的类
package com.fyber.challenge.rollingregression.io

import java.text.DecimalFormat

import com.fyber.challenge.rollingregression.datatypes.{ResultContainer, Result}


object SOSink extends Sink {

  private var headerHasPrinted: Boolean = false

  override def put(container: ResultContainer): Unit =
    if (headerHasPrinted) print(Formatter(container))
    else {
      println(Formatter.header)
      print(Formatter(container))
      headerHasPrinted = true
    }

  private object Formatter {

    def apply(resultContainer: ResultContainer): String =
      resultContainer.items.foldLeft("") ((acc, cr) => acc + format(cr))

    private val decimalFormatter: DecimalFormat = new DecimalFormat("#.#####")
    val header: String = {
      val titles: String =
        "%-10s %-8s %-3s %-12s %-7s %-9s" format ("T", "V", "N", "RS", "MaxV", "MinV")
      val border: String = "-" * titles.length
      titles + "\n" + border
    }

    private def roundup(value: Double): String = decimalFormatter format value

    private def format(computationResult: Result): String =
      "%d %-8s %-3d %-10s %9s %-9s".format(
        computationResult.last.timestamp.value,
        roundup(computationResult.last.priceRation.value),
        computationResult.size.value,
        roundup(computationResult.sum.value),
        roundup(computationResult.max.value),
        roundup(computationResult.min.value)
      ) + "\n"
  }
} 

//设置package包名称以及导入依赖的类
package ro.dvulpe

import org.joda.time.format.DateTimeFormat
import java.util.Locale
import java.text.{NumberFormat, DecimalFormat}

package object ingparser {
  implicit def richString(input: String) = new {
    def asDateTime = DateTimeFormat.forPattern("dd MMMMM yyyy").withLocale(new Locale("RO")).parseDateTime(input)

    def asDecimal = {
      val format: DecimalFormat = NumberFormat.getInstance(new Locale("RO")).asInstanceOf[DecimalFormat]
      format.setParseBigDecimal(true)
      BigDecimal.apply(format.parse(input).asInstanceOf[java.math.BigDecimal])
    }
  }

} 

//设置package包名称以及导入依赖的类
package decorator

import java.text.DecimalFormat

object TestDecoratorPattern {
  private val dFormat: DecimalFormat = new DecimalFormat("#.##")

  def main(args: Array[String]) {
    var pizza: Pizza = new SimplyVegPizza
    pizza = new RomaTomatoes(pizza)
    print(pizza)
    pizza = new GreenOlives(pizza)
    print(pizza)
    pizza = new Spinach(pizza)
    print(pizza)
    pizza = new SimplyNonVegPizza
    print(pizza)
    pizza = new Meat(pizza)
    print(pizza)
    pizza = new Cheese(pizza)
    print(pizza)
    pizza = new Ham(pizza)
    print(pizza)
  }

  private def print(pizza: Pizza) {
    println("Desc: " + pizza.getDesc)
    println("Price: " + dFormat.format(pizza.getPrice))
  }
} 

//设置package包名称以及导入依赖的类
package test

import java.text.DecimalFormat

import decorator._


class DecoratorSpec extends BaseSpec {
  private val dFormat: DecimalFormat = new DecimalFormat("#.##")

  private val meatCheeseHamNonVegPrice = dFormat.format(403.09)
  private val meatCheeseHamNonVegDesc = "SimplyNonVegPizza, Meat (14.25), Cheese (20.72), Ham (18.12)"

  describe("A decorator") {
    it("should decorate the given class") {
      Given("a pizza")
      val simplePizza: Pizza = new SimplyNonVegPizza()
      When("the pizza is decorated")
      val decoratedPizza: Pizza = new Ham(new Cheese(new Meat(simplePizza)))
      Then("the pizza should have the expected toppings")
      dFormat.format(decoratedPizza.getPrice) should be (meatCheeseHamNonVegPrice)
      decoratedPizza.getDesc should be (meatCheeseHamNonVegDesc)
    }
  }

} 

//设置package包名称以及导入依赖的类
import java.text.DecimalFormat


object CheckoutItems {

  val ApplePrice = 0.6
  val OrangePrice = 0.25
  val Apple = "Apple"
  val Orange = "Orange"
}
class CheckoutItems {

  import CheckoutItems._

  def checkoutItems(d: Double) = {
    val decimalFormat = new DecimalFormat("0.00")
    s"""£${decimalFormat.format(d)}"""
  }

  def scanItems(items: Map[String, Int]) = {

    def calculateOffer(itemPrice: Double, itemCount: Int, offerAmount: Int, quantity: Int): Double = {
      itemPrice * (((quantity / offerAmount) * itemCount) + ((quantity % offerAmount)))
    }

    items.foldLeft(0.0){ case (total, (item, quantity)) =>
      val result =  total + (item match {
          case Apple =>
            calculateOffer(ApplePrice, 1, 2, quantity)
          case Orange =>
            calculateOffer(OrangePrice, 2, 3, quantity)
          case _ => throw new IllegalStateException("item not valid")
        })

      BigDecimal(result).setScale(2, BigDecimal.RoundingMode.HALF_UP).toDouble
    }

  }

}