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// Calculate the moment when someone has lived for 10^9 seconds.
import java.time.LocalDate
import java.time.LocalDateTime
import java.time.Month
fun main(args: Array<String>) {
// Should print 2043-01-01T01:46:40
println(Gigasecond(LocalDate.of(2011, Month.APRIL, 25)).date)
// Should print 2009-02-19T01:46:40
println(Gigasecond(LocalDate.of(1977, Month.JUNE, 13)).date)
}
data class Gigasecond(val dobWithTime: LocalDateTime) {
constructor(dateOfBirth: LocalDate) : this(dateOfBirth.atStartOfDay())
private val GIGASECOND = Math.pow(10.0, 9.0).toLong()
val date: LocalDateTime = dobWithTime.plusSeconds(GIGASECOND)
}
import java.io.BufferedReader
import java.io.FileReader
/**
* Created by snake on 17. 5. 23.
*/
fun main(args : Array<String>){
// java와 흡사하다. 그러나 checked excpetion을 지원안함.
// 즉, try catch를 강제적으로 할 필요가 없다는 말임.
// 그것보다는 알아서 방어코드를 만들라는 것이 kotlin 철학임.
try{
13 / 0;
} catch(e: Exception){
println(e);
} finally {
println("마지막 수행.")
}
var zerodivided = 13 / 0;
println(zerodivided)
}
// try catch를 강제하지 않았을 뿐, 방어코드는 필요하다.
fun no_checked_exception(){
// java 코드 자동컨버팅
// try {
// val `in` = BufferedReader(FileReader(args[0]))
// var s: String?
//
// s = `in`.readLine()
// while (s != null) {
// println(s)
// s = `in`.readLine()
// }
// `in`.close()
// } catch (e: IOException) {
// System.err.println(e) // 에러가 있다면 메시지 출력
// System.exit(1)
// }
//
// kotlin은 try .. catch문을 반드시 할필요가 없다. checked exception을 지원안함!!
// ㅜㅜ
val `in` = BufferedReader(FileReader("file경로명"))
var s: String?
s = `in`.readLine()
while (s != null) {
println(s)
s = `in`.readLine()
}
`in`.close()
}
fun main(args: Array<String>) {
val a = 12
val b = 25
println(b + a)
println(b - a)
println(b / a)
println( a * b)
println(b % a )
println( 25.0 / 12)
}
fun main(args: Array<String>) {
val str = "May the Force be with you."
println(str)
val rawCrawl = """|long time ago,
|in a galaxy
|far far , away
|BUMM, BUUM , BUUMM"""".trimMargin()
println(rawCrawl)
// for (char in str) {
// println(char)
// }
val contentEquals = str.contentEquals("May the Force be with you.")
println(contentEquals)
val contains = str.contains("Force", true)
println(contains)
val uppercase = str.toUpperCase()
val lower = str.toLowerCase()
println(uppercase)
println(lower)
var num = 20
var stringNum = num.toString()
println(stringNum)
val subsequence = str.subSequence(4,13)
println(subsequence)
val name = "Luke Skywalker"
val color = "green"
val car = "Landspeeder"
val age = 27
println("$name has a $color lightsaber and drive a $car and is $age")
println("luke full name $name has ${name.length}")
}
fun main(args: Array<String>) {
var rawString :String ="I am Raw String!"
val escapedString : String ="I am escaped String!\n"
println("Hello!"+escapedString)
println("Hey!!"+rawString)
}
fun main(args: Array<String>) {
println("Texto Em Caixa".equals("texto em caixa", ignoreCase = true));
println("Texto Em Caixa".equals("texto em caixa", ignoreCase = false));
}
//https://pt.stackoverflow.com/q/256697/101
fun main(args : Array<String>){
var 문자열 : String = "일반 문자열";
println (
문자열.추가함수("추가함수")
);
}
// 이미 만들어진 객체에 함수를 추가할 수 있다.
fun String?.추가함수(s : String ) : String{
return "나는 $this 너는 $s";
}