package examples3;

import java.util.ArrayList;

import java.util.List;

import java.util.Random;

public class Worker {

private Random random = new Random();

private List<Integer> list1 = new ArrayList<>();

private List<Integer> list2 = new ArrayList<>();

private Object lock1 = new Object();

private Object lock2 = new Object();

public void stage1() {

synchronized (lock1) {

try {

Thread.sleep(5);

} catch (InterruptedException e) {

e.printStackTrace();

}

list1.add(random.nextInt(100));

}

}

public void stage2() {

synchronized (lock2) {

try {

Thread.sleep(5);

} catch (InterruptedException e) {

e.printStackTrace();

}

list2.add(random.nextInt(100));

}

}

public void process() {

for (int i = 0; i < 1000; i++) {

stage1();

stage2();

}

}

public void main() {

System.out.println("Hello");

long start = System.currentTimeMillis();

Thread t = new Thread(new Runnable() {

@Override

public void run() {

process();

}

});

Thread t2 = new Thread(new Runnable() {

@Override

public void run() {

process();

}

});

t.start();

t2.start();

try {

t.join();

t2.join();

} catch (InterruptedException e) {

e.printStackTrace();

}

System.out.println("Took: " + (System.currentTimeMillis() - start));

System.out.println("List 1 size:" + list1.size() + ", List 2 size:" + list2.size());

}

}