Copy all elements of Java HashSet to an Object Array Example


/*
  Copy all elements of Java HashSet to an Object Array Example
  This Java Example shows how to copy all elements of Java HashSet object to an
  array of Objects using toArray method.
*/

import java.util.HashSet;

public class CopyElementsOfHashSetToArrayExample {

 
public static void main(String[] args) {

   
//create object of HashSet
   
HashSet hSet = new HashSet();
   
   
//add elements to HashSet object
   
hSet.add(new Integer("1"));
    hSet.add
(new Integer("2"));
    hSet.add
(new Integer("3"));
   
   
/*
      To copy all elements of java HashSet object into array use
      Object[] toArray() method.
    */
   
   
Object[] objArray = hSet.toArray();
   
   
//display contents of Object array
   
System.out.println("HashSet elements are copied into an Array. Now Array Contains..");
   
for(int index=0; index < objArray.length ; index++)
     
System.out.println(objArray[index]);
 
}
}

/*
Output would be
HashSet elements are copied into an Array. Now Array Contains..
3
2
1
*/