Kotlin - Convert Map to/from Properties » grokonez

Kotlin - Convert Map to/from Properties » grokonez

In the post, we show how to convert ‘Kotlin Map to Properties’ and versus case ‘Properties to Kotlin Map’. I. Kotlin – Convert Map to Properties Use toProperties() method of Map class, -> Method signature: fun Map.toProperties(): Properties Practice: package com.javasampleapproach.kotlin.map2properties fun main(args: Array) { val map = mutableMapOf() map.put("db.username", "username") map.put("db.password", "password") map.put("db.driver", "org.postgresql.Driver") … Continue reading "Kotlin – Convert Map to/from Properties"

https://grokonez.com/kotlin/kotlin-convert-map-tofrom-properties

Kotlin – Convert Map to/from Properties

In the post, we show how to convert 'Kotlin Map to Properties' and versus case 'Properties to Kotlin Map'.

I. Kotlin - Convert Map to Properties

Use toProperties() method of Map class, -> Method signature:

fun Map.toProperties(): Properties

Practice:


package com.javasampleapproach.kotlin.map2properties

fun main(args: Array) {
    val map = mutableMapOf()
    map.put("db.username", "username")
    map.put("db.password", "password")
    map.put("db.driver", "org.postgresql.Driver")
    map.put("db.url", "jdbc:postgresql://localhost/testdb")

    // Converts this [Map] to a [Properties] object.
    // use -> fun Map.toProperties(): Properties
    val propertiesOfMap = map.toProperties()

    // Traverse through propertiesOfMap
    propertiesOfMap.forEach{(k, v) -> println("key=$k, value=$v")}
    /*
        key=db.password, value=password
        key=db.url, value=jdbc:postgresql://localhost/testdb
        key=db.username, value=username
        key=db.driver, value=org.postgresql.Driver
     */
}

II. Kotlin - Convert Properties to Map

Iterate through Properties object by forEach or for-loop statement then manually use put(key: K, value: V) method of Map interface.

Practice:

More at:

https://grokonez.com/kotlin/kotlin-convert-map-tofrom-properties

Kotlin – Convert Map to/from Properties

kotlin properties map

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Convert Kotlin Map to List » grokonez

In the tutorial, Grokonez will show you how to convert Kotlin Map to List. Related posts: – Convert Kotlin List to Map ContentsI. Convert Kotlin Map to List1. Basic Method2. Map ObjectII. Practice1. Create model data2. Kotlin programIII. Sourcecode I. Convert Kotlin Map to List 1. Basic Method – Use public fun Map.toList(): List to … Continue reading "Convert Kotlin Map to List"

Kotlin Properties - Read/Write Properties from/to .properties/.XML File » grokonez

In the post, we show how to Read/Write Properties from/to .Properties/.XML files by Kotlin language. ContentsI. Kotlin – Read/Write Properties from/to .Properties file1. Write Properties to .Properties file1.1 Properties store() method1.2 Kotlin Program – write Properties to .properties file2. Read Properties from .Properties file2.1 Properties load() method2.2 Kotlin Program – Read .Properties File to Properties … Continue reading "Kotlin Properties – Read/Write Properties from/to .properties/.XML File"

Kotlin Properties - Read/Write Properties from/to .properties/.XML File » grokonez

In the post, we show how to Read/Write Properties from/to .Properties/.XML files by Kotlin language. ContentsI. Kotlin – Read/Write Properties from/to .Properties file1. Write Properties to .Properties file1.1 Properties store() method1.2 Kotlin Program – write Properties to .properties file2. Read Properties from .Properties file2.1 Properties load() method2.2 Kotlin Program – Read .Properties File to Properties … Continue reading "Kotlin Properties – Read/Write Properties from/to .properties/.XML File"

Kotlin Map collection - map() methods » grokonez

In the tutorial, JavaSampleApproach will show you how to use map() methods to transform Kotlin Map collection to Kotlin List collection or a new Map collection. ContentsI. Kotlin Map collection with map() methods0. Initial data for practicing1. Transform a given Kotlin Map to List1.1 map()1.2 mapNotNull()1.3 mapTo()1.4 mapNotNullTo()2. Transform a given Kotlin Map to new … Continue reading "Kotlin Map collection – map() methods"

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