import java.util.*;

public class TestIterator{
	public static void main(String[] args){
		final List synchList = Collections.synchronizedList(new ArrayList());
		fillList(synchList, 10);
		Thread anotherThread = new Thread(){
			public void run(){
				try{
					Thread.sleep(300);
				}catch (InterruptedException e){
					System.out.println("anotherThread interrupted");
					return;
				}
					synchList.remove(1);
					synchList.remove(7);
			}
		};
		anotherThread.start();
		Iterator iterator = synchList.iterator();
		while(iterator.hasNext()){
			System.out.print(iterator.next());
			try{
				Thread.sleep(100);
			} catch (InterruptedException e) {
				System.out.println("Main thread interrupted");
				return;
			}
		}
	}
	static void fillList(List list, int n){
		for(int i = 1; i <= n; i++)
			list.add(i);
	}
}