Map Collection Traversal in Java

public static void Main (string[] args) {

hashmap<string,string> map = new hashmap<string,string> ();

Map.put ("Zhang San", "Sichuan");
Map.put ("John Doe", "Sichuan");
Map.put ("Harry", "Guangdong");
Map.put ("Zhao Liu", "Beijing");
Map.put ("Money Seven", "Hebei province");


SYSTEM.OUT.PRINTLN (map);

set<string> set = Map.keyset ();

for (iterator<string> it = Set.iterator (); It.hasnext ();) {

String str = It.next ();
System.out.print (str+ "= = =" +map.get (str));
}

System.out.println ();

for (String Str:set) {
System.out.print (str+ "from" +map.get (str) + ",");
}


System.out.println ();
set<entry<string,string>> EntrySet = Map.entryset ();

iterator<entry<string,string>> Entry = Entryset.iterator ();
while (Entry.hasnext ()) {
Entry<string,string> en = Entry.next ();
System.out.print (En.getkey () + "--" + en.getvalue ());
}
}

Map Collection Traversal in Java