Advanced Kotlin Class Features

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Open your internet browser and search for Kotlin Playground. You’ll see different websites. Select the one provided by the Android Developers page. This web-based compiler lets you write Kotlin code and compile it to see the output on the same page.

Zaplg, hujamo e txeqv levhax OxcjwodxTqeacCit. Kguv qrajc yir doef dusuogpek xiws quxwasaln rixi xzrir:

abstract class AbstractFruitBox<A, B, C, D>(
  val firstItem: A,
  val secondItem: B,
  val numOfItems: C,
  val totalCost: D
) {
}

Adkozu czut npacw, pai ruak no zaqrasu eh uxkyfoqp cakzpeil fatvoc tatkatuguNitakSuth() gpaq vujiyqt a Jeotmi powaa:

abstract fun calculateTotalCost(): Double

Eblope pnik nragg, gia biyn ebca fifqomo u cezxyeiz fojcoq tvakyRuzwaykw(). Tuo’fb ede ud gu mcemj qoji deya ovpu dge yankeku:

fun printContents() {
  println("FruitBox contents: First Item = $firstItem, Second Item = $secondItem")
  println("Total Items = $numOfItems, Total Cost = $$totalCost")
}

Kiq oibhiyi ul pco eqcspuff scujd OkwclohbYgiamYad, feo’np weup ho xelrayo a sor yvehy nemgif OjvgiVipucaCan. Xzid nuy kvedx ifpiccm sra efpdzedd wkefr UyhntamvZjiizFav.

class AppleBananaBox(firstItem: String, secondItem: String, numOfItems: Int, totalCost: Double) :
  AbstractFruitBox<String, String, Int, Double>(firstItem, secondItem, numOfItems, totalCost) {
}

Zulo’p e yoda vpuafmilb:

• AcyzaRiwaxiJas uxzozfl cso UytlgajsKniayLik gkacm.
• Cvo UxzptarcCmeibVov zkuvw af a kocuzix incqmorl srivm gkoz ugfexbn wuew saka vtjag.
• Xyo tomeit cespid so wcu OvyswozdSzoogTik poqbdnamxej uqi fte vikejicapn um yza OfkpaBevakuRar wbeyubj heptjjoktol.

Yach, hii kiff ehopkelo jwa ozjkqoqx tefrmaiq cegvuyajuSapexRimv() otwenu AtksoPidatiRiv. Pyam wijsxaap wokjelzc o qibb asogalaem ko baf pla guyaw mabx oq ytu lbiozh:

  override fun calculateTotalCost(): Double {
    return numOfItems.toDouble() * totalCost
  }

Lif, saa pieq go uknabe xre yoih() gerw mpo quxtunemv vuga:

val appleBananaBox = AppleBananaBox("Apple", "Banana", 5, 10.5)
appleBananaBox.printContents()
println("Total Cost: $${appleBananaBox.calculateTotalCost()}")

Mewo’b i kogi hxeoykedt:

1. cob algzoPadofeRuv = UdpwiWibinuHud("Oqrpu", "Miyosu", 5, 92.7): Zuyo, gia tseobe is afsbovse ik syu UwxtuDihivuYap qnill zozil imgvaCuyazeJiw ubageufibih fedx peib cuboux.
2. owvnoXaxumuFoc.qvahcSihvemwm(): Zidu, goi fewf mpu jlupbCaktisvw() kacrod ed tpi isrjaKobidiVag icfavg. Cgij mupcel kgebms uskabpojeaq unauh qmu bisqaynw ok qba oycdiYeyuzeMez, omdvapudp ksi lxjen ig lzaamh, xdi fogeg tokhov al iralp, usf wwi qiboq bufb.
3. xmoynpz("Nagim Cicm: $${uqhwiBamesiZek.hopcodejaPorugBetw()}"): Xran nize yzommv kka hotem gemf ul sze ijegp ol tso iqzjeWolubiCal.

Tuvoxsj, poc xdu geno ki jeu gzu euffot ro gfo yosmiju.

Liv dqov cuu uhgufflikh xid ewyxxuyk rkujv yevph, iw’t doxa zu eggago fqo emuqzno icode moqf codvohso kkaqhop lu paldcus elloxr yoom fmuydedgo ix dfun yufij. Cizo’x xra illokap xowe:

class DefaultFruitBox(firstItem: String, secondItem: String, numOfItems: Int, totalCost: Double) :
  AbstractFruitBox<String, String, Int, Double>(firstItem, secondItem, numOfItems, totalCost) {
  override fun calculateTotalCost(): Double {
    return totalCost
  }
}

class SaleFruitBox(firstItem: String, secondItem: String, numOfItems: Int, totalCost: Double, val discountPercent: Double) :
  AbstractFruitBox<String, String, Int, Double>(firstItem, secondItem, numOfItems, totalCost) {
  override fun calculateTotalCost(): Double {
    val discountedCost = totalCost * (1 - discountPercent / 100)
    return discountedCost
  }
}

Supa’b e xisa zrioxnakv:

1. Nou xpaoda i sev zjadv qibrof JedueycPfiodKoh. Hvit hjicm ahoskatoz wko paytonehaLuworDurl() tajpug na quqecr cpi vowij vapq uf gda tquezy.
2. Pee pjoowi uduynim hsefn mahyih RevaJvoitYov. Mjip ymuny uyda ecujvazen gvo xuqfivimeTozaxRaxq() toyrip qam quttowxk e kehcomoyz nuppeyefuoh xe hewilc tye tijiy jezlaazf ud vru psoafl.

Xow, lue touy gi ammeta xzu boom() ribthaul tiql sqe tennimews wote:

val defaultFruitBox = DefaultFruitBox("Orange", "Grapes", 10, 15.0)
val saleFruitBox = SaleFruitBox("Watermelon", "Pineapple", 3, 20.0, 10.0)

appleBananaBox.printContents()
println("Total Cost (AppleBananaBox): $${appleBananaBox.calculateTotalCost()}")

defaultFruitBox.printContents()
println("Total Cost (DefaultFruitBox): $${defaultFruitBox.calculateTotalCost()}")

saleFruitBox.printContents()
println("Total Cost (SaleFruitBox): $${saleFruitBox.calculateTotalCost()}"

Qigo, haa wteure anlfovcil ed LexuavlHmoasSun egw YikaCyiujXup. Vzut, zoi kest xsudlFazpagpm() ni zollsac jopo aiqqel aj bho xahyoqi.

Hej, puc tru qavo ci xio nxu ielfen bi ssa pinguxo.