import java.util.Collection;
import java.util.Iterator;
import java.util.ArrayList;
import java.util.TreeSet;
 
 
public class IteratorExample {
 
	public static Object max(Collection coll) {		
		Iterator it = coll.iterator();
		Object max = null;
		while (it.hasNext()) {
			Object cur = it.next();
			if (max == null) {
				max = cur;
			}
			else if (((Comparable)max).compareTo(cur) < 0) {
				max = cur;
			}
		}
		return max;
	}
 
	public static Object max2(Collection coll) {
		Object max = null;
		for (Object cur : coll) {
			if (max == null) {
				max = cur;
			}
			else if (((Comparable)max).compareTo(cur) < 0) {
				max = cur;
			}			
		}
		return max;
	}
 
	public static void main(String[] args) {
 
		ArrayList list = new ArrayList();
		list.add("fred");
		list.add("wilma");
		list.add("barney");
		list.add("betty");
 
		TreeSet set = new TreeSet();
		set.add(new Integer(43));
		set.add(new Integer(37));
		set.add(new Integer(50));
		set.add(new Integer(48));
 
		System.out.println("max name is " + max2(list));
		System.out.println("max temp is " + max2(set));
	}
}