EnumSet complementOf() Method in Java
The java.util.EnumSet.complementOf(Enum_Set) method is used to create an EnumSet containing elements of the same type as that of the specified Enum_Set, with the values present in the enum but other than those contained in the specified Enum_Set.
Syntax:
New_Enum_Set = EnumSet.complementOf(Enum_Set)
Parameters: The method accepts one parameter Enum_Set whose values are to be neglected while populating the values into the new complemented enum set.
Return Values: The method does not return any values.
Exceptions: The method throws NullPointerException if the value Enum_Set is NULL.
Below programs illustrate the working of java.util.EnumSet.complementOf() method:
Program 1:
import java.util.*;
enum GFG {
Welcome,
To,
The,
World,
of,
Geeks
}
;
public class Enum_Set_Demo {
public static void main(String[] args)
{
EnumSet<GFG> e_set = EnumSet.of(GFG.To, GFG.Welcome,
GFG.Geeks);
System.out.println( "Initial set: " + e_set);
EnumSet<GFG> final_set = EnumSet.complementOf(e_set);
System.out.println( "The updated set is:" + final_set);
}
}
|
Output:
Initial set: [Welcome, To, Geeks]
The updated set is:[The, World, of]
Program 2:
import java.util.*;
enum CARS {
RANGE_ROVER,
MUSTANG,
CAMARO,
AUDI,
BMW
}
;
public class Enum_Set_Demo {
public static void main(String[] args)
{
EnumSet<CARS> e_set = EnumSet.allOf(CARS. class );
System.out.println( "Initial set: " + e_set);
EnumSet<CARS> final_set = EnumSet.complementOf(e_set);
System.out.println( "The updated set is:" + final_set);
}
}
|
Output:
Initial set: [RANGE_ROVER, MUSTANG, CAMARO, AUDI, BMW]
The updated set is:[]
Last Updated :
03 Oct, 2018
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