time-relative functions in Kotlin/Java

time_example.kt

import java.time.Instant
import java.time.LocalDate
import java.time.LocalDateTime
import java.time.LocalTime
import java.time.format.DateTimeFormatter

fun main(){
  print("local date: ${LocalDate.now()}") // 2022-02-18
  print("local time: ${LocalTime.now()}") // 15:46:05.838
  print("instant now: ${Instant.now()}"); // 2022-02-18T07:46:05.838Z
  print("timestamp now: ${System.currentTimeMillis()/1000L}") // unix timestamp
  print("format now: ${DateTimeFormatter.ofPattern("yy/M/dd|HH:mm:ss").format(LocalDateTime.now())}") // 22/2/18|15:46:05
}