CodeGraphContext

package com.example.project.advanced // Abstract class hierarchy abstract class Shape { abstract fun area(): Double open fun description(): String = "Unknown Shape" } class Circle(val radius: Double) : Shape() { override fun area(): Double = Math.PI * radius * radius override fun description(): String = "Circle with radius $radius" } // Sealed class hierarchy sealed class Result { data class Success(val data: String) : Result() data class Error(val message: String) : Result() object Loading : Result() } // Nested and Inner classes class Outer { private val bar: Int = 1 class Nested { fun foo() = 2 } inner class Inner { fun foo() = bar } } // Companion Object class DatabaseConnection { companion object Factory { fun create(): DatabaseConnection = DatabaseConnection() const val TIMEOUT = 3000 } } // Object declaration (Singleton) object Configuration { var host: String = "localhost" var port: Int = 8080 } interface Clickable { fun click() fun doubleClick() { click() click() } }