JUC-CopyOnWriteArrayList

package syn;

import java.util.concurrent.CopyOnWriteArrayList;

public class TestJUC {
public static void main(String[] args) {
CopyOnWriteArrayList list = new CopyOnWriteArrayList();
for (int i = 0; i < 10000; i++) {
new Thread(()->{
list.add(Thread.currentThread().getName());
}).start();
}
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
System.out.println(list.size());
}
}