Kotlin Notebook を利用してみる
takeharak
ちょっとしたコードの実行, ドキュメンテーションとかに使える Kotlin Notebook が IntelliJ IDEA Ultimate/Community 2025.1 から out of the box で 利用可能になり Android Studio でもプラグインとして導入可能予定なので、 Get started してみる
今回の環境
TL;DR
IntelliJ IDEA 2025.1 のインストール
Create an empty project
Create a Kotlin Notebook
Hello World!
+ println("Hello, this is a Kotlin Notebook!")
Add a markdown
+ # Example operations
Simple operations
+ 10 + 10
+ val a = 100
+ println(a * a)
Add Kotlin DataFrame and Kandy libraries to your Kotlin Notebook
// Ensures that the latest available library versions are used
+ %useLatestDescriptors
// Imports the Kotlin DataFrame library
+ %use dataframe
// Imports the Kotlin Kandy library
+ %use kandy
Creates a DataFrame
// Creates a DataFrame by importing data from the "netflix_titles.csv" file.
+ val rawDf = DataFrame.read("netflix_titles.csv")
// Displays the raw DataFrame data
+ rawDf
Visually represent in chart
+ rawDf
// Counts the occurrences of each unique value in the column named "type"
+ .valueCounts(sort = false) { type }
// Visualizes data in a bar chart specifying the colors
+ .plot {
+ bars {
+ x(type)
+ y("count")
+ fillColor(type) {
+ scale = categorical(range = listOf(Color.hex("#00BCD4"), Color.hex("#009688")))
+ }
+ }
+
// Configures the layout of the chart and sets the title
+ layout {
+ title = "Count of TV Shows and Movies"
+ size = 900 to 550
+ }
+ }
