Example iterator with HashMap

myiter.java

public void pr(ConcurrentHashMap<String, String[][]> hmap) {
  	Iterator itr = hmap.entrySet().iterator();

		while (itr.hasNext()) {
			Map.Entry pairs = (Map.Entry) itr.next();
			System.out.println("key= " + pairs.getKey());
			pr((String[][]) pairs.getValue());
			// itr.remove(); // avoids a ConcurrentModificationException
		}
	}