The Java.util.EnumSet package is required to create an EnumSet, so you will have to import it first in your Java program. Unlike other set implementations, EnumSet does not have a public constructor, so you must use the predefined methods. These predefined methods include:
allOf (Size)- Using the allof() method, you can create an enum set containing all values of the specified enum type Size.
noneOf(Size)- An empty EnumSet is created with the noneOf() method.
range(e1,e2) Method- Range() creates an enum set which includes both values for an enum between e1 and e2 within a given range.
of() Method- Using the () method, an enum set containing the specified element is created.
add(): this method inserts the specified values into the EnumSet
addAll(): this method inserts the specified collections to the set
iterator(): this method is used to access the Enum set elements
hasNext(): this method returns true if there is a next element in the EnumSet
next(): this method returns the next elements in the EnumSet
remove(): this method removes the specified element from the EnumSet
removeAll(): this method removes all elements from the EnumSet
Example of EnumSet
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import java.util.EnumSet; import java.util.Iterator;
public class EnumExample { enum ES { a, b, c, d; } public static void main(String[] args) { // Creating EnumSet EnumSet<ES> sizes = EnumSet.allOf(ES.class); Iterator<ES> iterate = sizes.iterator(); System.out.print("EnumSet Values: "); while(iterate.hasNext()) { System.out.print(iterate.next()); System.out.print(", "); } } }
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Output:
EnumSet Values: a, b, c, d
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