import java.util.Iterator;
import java.util.Map;
import java.util.TreeMap;

public class ExIterator {
    public static void main(String[] args) {
        Map map = new TreeMap();
        map.put("a","test2");
        map.put("c","test1");
        map.put("b","test3");
        
        StringBuffer buf = new StringBuffer();
        
        for (Iterator itr = map.keySet().iterator();itr.hasNext();){
            String key   = (String)itr.next();
            String value = (String)map.get(key);
            System.out.println(key +" = " + value);
        }
    }
}

a = test2
b = test3
c = test1