package Threads

import java.util.*

fun main() {

    val waitNotify = WaitNotify()

    val t1 = Thread(Runnable {
        waitNotify.thread1()
    })

    val t2 = Thread(Runnable {
        waitNotify.thread2()
    })

    t1.start()
    t2.start()

    t1.join()
    t2.join()
}

class WaitNotify {
    val LOCK = Any()

    fun thread1() {
        synchronized(LOCK) {
            println("Thread 1 is working")
            println("Thread 1 is left key and waiting")
            // Anahtarı bıraktım Thread2 gir ve işini hallet
            (LOCK as java.lang.Object).wait()
            println("Thread 1 finished job")
        }
    }

    fun thread2() {
        Thread.sleep(2000)
        val scanner = Scanner(System.`in`)

        synchronized(LOCK) {
            println("Thread 2 is working")
            println("Please key to continue")
            scanner.nextLine()
            // Thread 1 anahtarı işim bittikten sonra kapının üzerine koyacağım kaldığın yerden devam edebilirsin.
            (LOCK as java.lang.Object).notify()
            println("Thread 2 finished job")
        }
    }
}