In the HashMap, we know the values but we dont know the key, then how can we ge

In the HashMap, we know the values but we dont know the key,
then how can we get the key from HashMap ?????

Question Posted / sathiyamoorthi

4 Answers
8970 Views
Kanbay, I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

In the HashMap, we know the values but we dont know the key, then how can we get the key from HashM..

Answer / ganesh

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

public class MapEntrySetDemo {

public static void main(String[] argv) {

Map map = new HashMap();

map.put("Adobe", "Mountain View, CA");
map.put("IBM", "Mountain View, CA");
map.put("Learning Tree", "Los Angeles, CA");
map.put("Microsoft", "Redmond, WA");
map.put("Netscape", "Mountain View, CA");
map.put("O'Reilly", "Sebastopol, CA");
map.put("Sun", "Mountain View, CA");

Set entries = map.entrySet();
Iterator it = entries.iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
if("Mountain View, CA".equals(entry.getValue()))
{
System.out.println(entry.getKey() );

}
}
}
}

Is This Answer Correct ?

6 Yes

0 No

In the HashMap, we know the values but we dont know the key, then how can we get the key from HashM..

Answer / sathiyamoorthi

Hi Ganesh, Thank u for the ur very good answer...

Is This Answer Correct ?

2 Yes

0 No

In the HashMap, we know the values but we dont know the key, then how can we get the key from HashM..

Answer / ravikiran

getkeyMethodMap

Is This Answer Correct ?

0 Yes

0 No

In the HashMap, we know the values but we dont know the key, then how can we get the key from HashM..

Answer / siva thimmannagari

by using the hashcode() method

Is This Answer Correct ?

0 Yes

0 No

Post New Answer