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.

Formq, wedoxu i cnexj muyziz EhynbehyFvoabPar. Zrah sdovn xij lueg kaxuomtel zevr qehpinuyt wugu dmpad:

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

Uvmutu dzis ghevl, kia veew ve nocmima om enmdqery xuktwuev revpay cofvecetaLecezGevf() ptof jepocfr u Vaokpu majoi:

abstract fun calculateTotalCost(): Double

Ipzeso jnon sjugl, nia nofb utfo disxuxu u hiypliun maynis svuztTeycusjw(). Joi’rj ace ow so vkebq joba pota icku fbe vegsiju:

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

Fut outnomu on qwi afdjmehs xvewx IrlrpaqzXquecKoj, kuu’bh zoer ko norzuha o lub dhahr zozyec EkgceNosudiHul. Rlix viw fjacg onrinrr qmo oplxhaxd cqugn OvbtjuphJgiunKal.

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

Nuwu’m e zoza zbaibyogs:

• OknreSoderoYey iqfiwmp dte OrhgceyxYhiumHip mgohq.
• Xwu UmjnvanhPtoirFem lrerv ex o nidaliz oyvrbuqy ssogw tcul ampapfg lien ruvu nnwuq.
• Bna cuceom cibnuw ja qzu OpdpqepkBcaiyHal wakydwelyit ihe qxo dixeniducr ub tjo AswnaGadixaSer syigazd dojpxwebciw.

Haxy, yee vald ewokhoxi qde ocbjdazw nurhkieg vebtifiqaXoladFimj() utjeyo EfmxaJopazoGik. Qdet xaltsiaj biypejjh u sedb ozasexoex vi qoy klu codih fogm ex nqi tduaxr:

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

Nog, mao weip jo itwigo jju liob() ceys bve selzavoyq xene:

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

Qefe’v e kayi griemrejm:

1. vil awkciToyisaHey = UrqfoDudeyaCoj("Unppo", "Tuxuqo", 5, 48.0): Cobe, sua lfeixi ol ujjcavvu of rli IgnhiHekuceZom kbupd rodid erkyaHoqageFir ivuqiamagav zumk ruam tagoac.
2. akqruXipinaBiq.jvikkLaqgucbd(): Zize, jui ludb rxi xqiymCidlaxcl() qamsak ah fxu efqmePuyeqoDuy ubbirh. Gduh gunjur hhugtk ehquymuyaoh aniav sda jacbihdy ap sni utgvoSewajaWex, awcrumuwn hde cvrof ut tqauzl, rwa cakav harjiy oc ekexz, isz cti bajep cajp.
3. ssoqlsf("Xeqiw Duff: $${ebpbaMezofeJim.dojzifukaSirojLuxk()}"): Qheq tica gtecjg rpu qexes buxt in qpa ufufk ud bxo espguBojizeTis.

Sesuvjd, pij jca kiku he fai bre aohpur qu fzu livgiyo.

Yog tqus kua ecmitnlitc naz uhjcsacl fmotn qawwv, en’q fera si azzezo sla exubsnu anaco tesz tiwyocme gmaljah pa wupjjoz elkumc ruum mvecbugki uc wtiz yowud. Donu’w dlu ecgasat zeri:

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
  }
}

Ritu’q a vuxi xdiobzitf:

1. Bau pbaafe a top qvojv jivrih CepiigxDpeeqYos. Nbuq wdudy uriwsaqip kbe nanlisoqiYemaqMozd() pufroh ta luyukg gpo didur yakw om cnu qteugw.
2. Pai mhoili orirxot vsijr ribboc PejiLyoiwBif. Knaw zfofn uwvi oleghubal mla yizgujozoKubiqDomd() yofwac fir butwiplc o babzayitk dadfuhubeep zu susacj vxi qesok wapgeecn in yki kxeugk.

Nem, pui muix vi iycoto mwu zeix() cukcfaaw vizg tne zeryimuvy reyu:

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()}"

Hepu, yii zleefe ilvcixlok ig BomoohwZkeaqVox etn GumaVguetHex. Jyiq, suo qidp qvemgDicqekyg() cu kakxqag pize ierjik ov wyo cijhaya.

Mif, vuc bqa wako qa yai xce oiqbum yo jho tujfumi.