DeadlockDemo.java

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

public class DeadlockDemo {

  public static void main(String[] args) {
    List<String> headLapsed = new ArrayList<>();
    List<String> pahadLapsed = new ArrayList<>();
    headLapsed.addAll(Arrays.asList(
        "Karl", "Toom", "Rene", "Aadam", "Hans", "Henry",
        "Madis", "Tiit", "Ott", "Simmo", "Aleksis", "Oskar",
        "Heiti", "Veiko", "Dmitri", "Laura", "Gromet", "Stanislav"));

    Thread märt = new Thread(() -> {
      while (true) {
        System.out.println(System.currentTimeMillis() + " kõik on pahad!");
        synchronized (headLapsed) {
          synchronized (pahadLapsed) {
            pahadLapsed.addAll(headLapsed);
            headLapsed.clear();
          }
        }
      }
    }, "Märt");

    Thread taavi = new Thread(() -> {
      while (true) {
        System.out.println(System.currentTimeMillis() + " kõik on head!");
        synchronized (pahadLapsed) {
          synchronized (headLapsed) {
            headLapsed.addAll(pahadLapsed);
            pahadLapsed.clear();
          }
        }
      }
    }, "Taavi");

    märt.start();
    taavi.start();
  }

}