Java EnumMap - size() Method
The java.util.EnumMap.size() method returns the total number of key-value mapping present in the map.
Syntax
public int size()
Parameters
No parameter is required.
Return Value
Returns the total number of key-value mapping in the map.
Exception
NA
Example:
In the example below, the java.util.EnumMap.size() method is used to find out the total number of key-value mapping in the EnumMap.
import java.util.*;
public class MyClass {
//creating an enum
public enum weekday{
MON, TUE, WED, THU, FRI
}
public static void main(String[] args) {
//creating EnumMap
EnumMap<weekday,Integer> MyMap =
new EnumMap<weekday,Integer>(weekday.class);
//associate values in MyMap
MyMap.put(weekday.MON, 1);
MyMap.put(weekday.TUE, 2);
MyMap.put(weekday.WED, 3);
MyMap.put(weekday.THU, 4);
System.out.println("Size of MyMap: "+ MyMap.size());
//adding one more pair in the map
MyMap.put(weekday.FRI, 5);
System.out.println("Size of MyMap: "+ MyMap.size());
}
}
The output of the above code will be:
Size of MyMap: 4 Size of MyMap: 5
❮ Java.util - EnumMap
