дз6

src/main/kotlin/ru/otus/homework/builder/Person.kt

@@ -0,0 +1,24 @@
+package ru.otus.homework.builder
+
+class Person private constructor(
+    val firstName: String,
+    val lastName: String,
+    val age: Int,
+    val address: String
+) {
+    class Builder {
+        private var firstName: String = ""
+        private var lastName: String = ""
+        private var age: Int = 0
+        private var address: String = ""
+
+        fun setFirstName(firstName: String) = apply { this.firstName = firstName }
+        fun setLastName(lastName: String) = apply { this.lastName = lastName }
+        fun setAge(age: Int) = apply { this.age = age }
+        fun setAddress(address: String) = apply { this.address = address }
+
+        fun build(): Person {
+            return Person(firstName, lastName, age, address)
+        }
+    }
+}

src/main/kotlin/ru/otus/homework/decorator/CheeseDecorator.kt

@@ -0,0 +1,8 @@
+package ru.otus.homework.decorator
+
+class CheeseDecorator (pizza: Pizza) : PizzaDecorator(pizza) {
+    override fun makePizza(): String {
+        val basePizza = super.makePizza()
+        return "$basePizza with Cheese"
+    }
+}

src/main/kotlin/ru/otus/homework/decorator/MargheritaPizza.kt

@@ -0,0 +1,7 @@
+package ru.otus.homework.decorator
+
+class MargheritaPizza : Pizza {
+    override fun makePizza(): String {
+        return "Margerita Pizza"
+    }
+}

src/main/kotlin/ru/otus/homework/decorator/Pizza.kt

@@ -0,0 +1,5 @@
+package ru.otus.homework.decorator
+
+interface  Pizza {
+    fun makePizza(): String
+}

src/main/kotlin/ru/otus/homework/decorator/PizzaDecorator.kt

@@ -0,0 +1,7 @@
+package ru.otus.homework.decorator
+
+open class PizzaDecorator (private val pizza: Pizza) : Pizza {
+    override fun makePizza(): String {
+        return pizza.makePizza()
+    }
+}

src/main/kotlin/ru/otus/homework/singleton/Cat.kt

@@ -0,0 +1,15 @@
+package ru.otus.homework.singleton
+
+class Cat private constructor() {
+    init {
+        println("The cat is created!")
+    }
+
+    fun meow() {
+        println("Meow!")
+    }
+
+    companion object {
+        val instance: Cat by lazy { Cat() }
+    }
+}

src/main/kotlin/ru/otus/homework/team/Command.kt

@@ -0,0 +1,5 @@
+package ru.otus.homework.team
+
+interface Command {
+    fun execute()
+}

src/main/kotlin/ru/otus/homework/team/Light.kt

@@ -0,0 +1,11 @@
+package ru.otus.homework.team
+
+class Light {
+    fun turnOn() {
+        println("Light is turned on")
+    }
+
+    fun turnOff() {
+        println("Light is turned off")
+    }
+}

src/main/kotlin/ru/otus/homework/team/LightOffCommand.kt

@@ -0,0 +1,7 @@
+package ru.otus.homework.team
+
+class LightOffCommand (private val light: Light) : Command {
+    override fun execute() {
+        light.turnOff()
+    }
+}

src/main/kotlin/ru/otus/homework/team/LightOnCommand.kt

@@ -0,0 +1,7 @@
+package ru.otus.homework.team
+
+class LightOnCommand (private val light: Light) : Command {
+    override fun execute() {
+        light.turnOn()
+    }
+}

src/main/kotlin/ru/otus/homework/team/RemoteControl.kt

@@ -0,0 +1,7 @@
+package ru.otus.homework.team
+
+class RemoteControl (private val command: Command) {
+    fun pressButton() {
+        command.execute()
+    }
+}