import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
public class SyncTest {
public static void main(String args[]) {
Set simpsons = new HashSet();
simpsons.add("Bart");
simpsons.add("Hugo");
simpsons.add("Lisa");
simpsons.add("Marge");
simpsons.add("Homer");
simpsons.add("Maggie");
simpsons.add("Roy");
simpsons = Collections.synchronizedSet(simpsons);
synchronized (simpsons) {
Iterator iter = simpsons.iterator();
while (iter.hasNext()) {
System.out.println(iter.next());
}
}
Map map = Collections.synchronizedMap(new HashMap(89));
Set set = map.entrySet();
synchronized (map) {
Iterator iter = set.iterator();
while (iter.hasNext()) {
System.out.println(iter.next());
}
}
}
}
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