Topic: Java

🔍 Quick look before the question:

public class Test {
  static int counter = 0;

  static synchronized void increment() {
    counter++;
  }

  public static void main(String[] args) throws InterruptedException {
    Thread t1 = new Thread(() -> {
      for (int i = 0; i < 1000; i++) increment();
    });
    Thread t2 = new Thread(() -> {
      for (int i = 0; i < 1000; i++) increment();
    });
    t1.start(); t2.start();
    t1.join(); t2.join();
    System.out.println(counter);
  }
}