Java Collection Tutorial - Java EnumSet.copyOf(Collection <E> c)

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Syntax

EnumSet.copyOf(Collection <E> c) has the following syntax.

public static <E extends Enum <E>> EnumSet <E> copyOf(Collection <E> c)

Example

In the following code shows how to use EnumSet.copyOf(Collection <E> c) method.

//  ww  w.  ja  v a2 s.  c  om

import java.util.ArrayList;
import java.util.Collection;
import java.util.EnumSet;

enum Numbers {

   ONE, TWO, THREE, FOUR, FIVE
};
public class Main {

   public static void main(String[] args) {

      // create a new collection
      Collection collection = new ArrayList();
    
      // print the collection
      System.out.println("Colletion :" + collection);

      // add two elements in the collection
      collection.add(Numbers.ONE);
      collection.add(Numbers.THREE);

      // create an EnumSet that is a copy of the collection 
      EnumSet<Numbers>  set = EnumSet.copyOf(collection);

      System.out.println(set);
   }
}

The code above generates the following result.

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