Java EnumMap - entrySet() Method
The java.util.EnumMap.entrySet() method returns a Set view of the mappings contained in this map. The set is backed by the map, so changes to the map are reflected in the set, and vice-versa.
Syntax
public Set<Map.Entry<K,V>> entrySet()
Here, K and V are the type of key and value respectively maintained by the container.
Parameters
No parameter is required.
Return Value
Returns a set view of the mappings contained in this enum map.
Exception
NA
Example:
In the example below, the java.util.EnumMap.entrySet() method returns a view of the mappings contained in the given EnumMap.
import java.util.*;
public class MyClass {
//creating an enum
public enum weekday{
SUN, MON, TUE, WED, THU, FRI, SAT
}
public static void main(String[] args) {
//creating an EnumMap
EnumMap<weekday,Integer> MyMap =
new EnumMap<weekday,Integer>(weekday.class);
//associate values in the map
MyMap.put(weekday.MON, 1);
MyMap.put(weekday.TUE, 2);
MyMap.put(weekday.WED, 3);
MyMap.put(weekday.THU, 4);
MyMap.put(weekday.FRI, 5);
//printing the content of the EnumMap
System.out.println("MyMap contains: " + MyMap);
//creating a set view of mapping of the EnumMap
Set SetView = MyMap.entrySet();
//printing the set view of mapping
System.out.println("SetView contains: " + SetView);
}
}
The output of the above code will be:
MyMap contains: {MON=1, TUE=2, WED=3, THU=4, FRI=5}
SetView contains: [MON=1, TUE=2, WED=3, THU=4, FRI=5]
❮ Java.util - EnumMap
