import java.util.Iterator;
import java.util.Vector;
public class Main {
Vector data = new Vector();
public Main() {
new Producer().start();
new Consumer().start();
}
public static void main(String[] args) throws Exception {
new Main();
}
class Consumer extends Thread {
Consumer() {
super("Consumer");
}
public void run() {
while (true) {
synchronized (data) {
Iterator it = data.iterator();
while (it.hasNext())
it.next();
}
}
}
}
class Producer extends Thread {
Producer() {
super("Producer");
}
public void run() {
while (true) {
data.addElement(new Object());
if (data.size() > 1000)
data.removeAllElements();
}
}
}
}