extracting values from HashMap
Solution 1
I would use something like
Map<Integer, Integer> map = new HashMap<>();
for(int value: map.values())
System.out.println(value);
Solution 2
You are looking for map.values()
.
Solution 3
Map has a method called values() to get a Collection of all the values. (the right side)
Likewise, there is a method call keySet() to get a Set of all the keys. (the left side)
Solution 4
import java.util.HashMap;
public class Test
{
public static void main( String args[] )
{
HashMap < Integer , Integer > map = new HashMap < Integer , Integer >();
map.put( 1 , 2 );
map.put( 2 , 3 );
map.put( 3 , 4 );
for ( Integer key : map.keySet() )
{
System.out.println( map.get( key ) );
}
}
}
Anurag Ramdasan
website: anuragramdasan.com Twitter : @anuragwho
Updated on August 09, 2020Comments
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Anurag Ramdasan almost 4 years
I was trying to learn and make understanding out of the working of a HashMap. So i created this hashmap to store certain values which upon displaying using an Iterator gives me outputs as
1=2 2=3 3=4
and so on. This output i obtain using the
Iterator.next()
function. Now what my actual doubt is that since the type of this value returned in of an Iterator Object, if i need to extract only the right hand side values of the above equalities, is there any function for that? Something like a substring. Is there any way i could just get results as2 3 4
Any help will be appreciated. thanks in advance.