What is wrong?

Pytania dotyczące zadania

Rozwiązane

package pl.codegym.task.task16.task1603; import java.util.ArrayList; import java.util.List; /* Lista i kilka wątków */ public class Solution { public static volatile List<Thread> list = new ArrayList<>(5); public static void main(String[] args) { SpecialThread specialThread1 = new SpecialThread(); SpecialThread specialThread2 = new SpecialThread(); SpecialThread specialThread3 = new SpecialThread(); SpecialThread specialThread4 = new SpecialThread(); SpecialThread specialThread5 = new SpecialThread(); Thread thread1 = new Thread(specialThread1); Thread thread2 = new Thread(specialThread2); Thread thread3 = new Thread(specialThread3); Thread thread4 = new Thread(specialThread4); Thread thread5 = new Thread(specialThread5); list.add(thread1); list.add(thread2); list.add(thread3); list.add(thread4); list.add(thread5); thread1.start(); thread2.start(); thread3.start(); thread4.start(); thread5.start(); } public static class SpecialThread implements Runnable { public void run() { System.out.println("To jest metoda run wewnątrz SpecialThread"); } } }

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Tomasz Sknadaj

Poziom 18 , Skoczów, Polska

20 lipca 2020, 16:05

I don't get it. I make very similar code and i didn't pass verification on the same task.

public class Solution {
    public static volatile List<Thread> list = new ArrayList<>(5);

    public static void main(String[] args) {
        //tutaj wpisz swój kod

        SpecialThread specialThread1 = new SpecialThread();
        Thread thread1 = new Thread(specialThread1);
        list.add(thread1);

        SpecialThread specialThread2 = new SpecialThread();
        Thread thread2 = new Thread(specialThread2);
        list.add(thread2);

        SpecialThread specialThread3 = new SpecialThread();
        Thread thread3 = new Thread(specialThread3);
        list.add(thread3);

        SpecialThread specialThread4 = new SpecialThread();
        Thread thread4 = new Thread(specialThread4);
        list.add(thread4);

        SpecialThread specialThread5 = new SpecialThread();
        Thread thread5 = new Thread(specialThread5);
        list.add(thread5);

        for(int a = 0; a<5; a++){
            list.get(a).start();
        }
    }

    public static class SpecialThread implements Runnable {
        public void run() {
            System.out.println("To jest metoda run wewnątrz SpecialThread");
        }
    }
}

Each thread works with his own SpecialThread object, so what's the problem?

Nouser

Poziom 36 , Germany

4 maja 2020, 09:52

rozwiązanie

I've commented out my start() calls... maybe that's the problem, I don't remember.

Piotr Skuza

Poziom 19 , Warsaw, Poland

4 maja 2020, 13:08

Thanks, as I commented on start () it worked :)