Realm Sort Bug

MainActivity.kt

package com.moshbit.realmsortbug

import android.app.Activity
import android.content.Context
import android.os.Bundle
import io.realm.Realm
import io.realm.RealmConfiguration
import io.realm.RealmObject
import io.realm.Sort

class MainActivity : Activity() {

  val names = """cbaCBA123,.-!+'?<>;:_#*=()/&%$ "zxyZXY""".toCharArray()

  fun init(context: Context) {
    // Init realm
    Realm.init(context)

    // Init configuration
    val configuration = RealmConfiguration.Builder()
        .name("app.realm")
        .modules(Realm.getDefaultModule())

    // Create config
    val config = configuration.build()

    // Apply config as default
    Realm.setDefaultConfiguration(config)
  }

  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

    init(this)

    val realm = Realm.getDefaultInstance()

    realm.executeTransaction { tx ->
      tx.deleteAll()
      names.forEach { name ->
        tx.insert(Dog().apply { this.name = "$name" })
      }
    }

    println("--------------------------------------")
    println("jvm unsorted:   " + names.joinToString(separator = ""))
    println("realm unsorted: " + realm.where(Dog::class.java).findAll().joinToString(separator = "", transform = Dog::name))
    println("--------------")
    println("jvm sorted:     " + names.sorted().joinToString(separator = ""))
    println("realm sorted:   " + realm.where(Dog::class.java).findAllSorted("name", Sort.ASCENDING).joinToString(separator = "", transform = Dog::name))
    println("--------------------------------------")
  }
}


open class Dog : RealmObject() {
  open var name: String = ""
}

Output:

--------------------------------------
jvm unsorted:   cbaCBA123,.-!+'?<>;:_#*=()/&%$ "zxyZXY
realm unsorted: cbaCBA123,.-!+'?<>;:_#*=()/&%$ "zxyZXY
--------------
jvm sorted:      !"#$%&'()*+,-./123:;<=>?ABCXYZ_abcxyz
realm sorted:   '- !"#$%&()*,./:;?_+<=>123aAbBcCxXyYzZ
--------------------------------------

Demo Project: https://files.fm/u/sxvabaws