ストリングをロングに変換する

package com.javasampleapproach.string2long
fun main(args : Array<String>) {
    // use method:
    // -> public inline fun String.toLong(): Long = java.lang.Long.parseLong(this)
    val number: Long = "123".toLong();
    println(number) // 123
    
    // if the string is not a valid representation of a number
    // -> throw NumberFormatException
    try{
        "12w".toLong();
    }catch(e: NumberFormatException){
        println(e.printStackTrace())
        // -> print on console:
        /*
            java.lang.NumberFormatException: For input string: "12w"
            at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
            at java.lang.Long.parseLong(Long.java:589)
            at java.lang.Long.parseLong(Long.java:631)
            at com.javasampleapproach.string2long.ConvertString2LongKt.main(ConvertString2Long.kt:12)
        */
    }
}