Why do we use entrySet() method and use the returned set to iterate a map?

Question

Can anyone help me why we use set to iterate and why we don't go for map?

Map m=new HashMap();

Set s=map.entrySet();

Iterator i=s.iterator()

while(s.hasNext()){

    Map.Entry m= (map.Entry) s.next();

    System.out.println(""+m.getKey()+""+ m.getValue());

}

Any help would be appreciated.

Answer 1

Basically, using sets and lists we can iterate for the key or values or the whole key/value entity. Also, you can use the below code as well:

Map<K,V> m=new LinkedHashMap<K,V>();

for(Map.Entry<K,V> entry: m.entrySet())

    System.out.println(entry.getKey() + ": " + entry.getValue());

I hope this will help.

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