import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

public class Demo {

    public static void main(String[] args) {
        Map<String, String> map=new HashMap<String,String>();
        map.put("key1", "L");
        map.put("key2", "i");
        map.put("key3", "k");
        map.put("key4", "e");
        map.put("key5", "f");
        map.put("key6", "r");
        
        //获取 键值
        Set<String> s= map.keySet();
        Iterator<String> iter= s.iterator();
        while(iter.hasNext()) {
            System.out.println(iter.next());
        }
        
        
        //获取值
        Collection<String> c= map.values(); 
        Iterator<String> i=c.iterator();
        while(i.hasNext()) {
            System.out.println(i.next());
        }
    }
}