Java Iterators. How to inspect the Iterator? -

i want know if there way inspect iterator object. kind of map?

also, there a better way take contents of iterator object , put them in mapc?

here code:

import java.util.hashmap; import java.util.treemap; import java.util.map; import java.util.iterator;  public class maps {   public static void main(string[] args) {     map mapa = new hashmap();     map mapb = new treemap();      mapa.put("key1", "element 1");     mapa.put("key2", "element 2");     mapa.put("key3", "element 3");      // 3 put() calls maps string value string key. can     // obtain value using key. use get() method this:      string element1 = (string) mapa.get("key1");     // why need type cast on right?     system.out.println(element1);      // lets iterate through keys of map:      iterator iterator = mapa.keyset().iterator();     system.out.println(iterator);  // how inspect this? kind of map?      map mapc = new hashmap();     while(iterator.hasnext()){       object key   = iterator.next();       object value = mapa.get(key);       mapc.put(key,value);     } // there better way take contents of iterator , put them in new map?     system.out.println(mapc);   } } 

the thing can iterator call hasnext(), next(), , remove() methods. iterator implementations every different type of collection (and collection view) different in every case; there's nothing else can them.

as stated elsewhere, can use mapc.putall(mapa) copy on contents mapa. should use generics instead of raw types, though.