» » » Java program to Copy all elements of Java HashSet to an Object Array

1.Basic java example program to Copy all elements of Java HashSet to an Object Array
  • Object[] toArray()   This method is used To copy all elements of java HashSet object into array use

  1. package com.copyelementhashset;
  2.  
  3. import java.util.HashSet;
  4. import java.util.Iterator;
  5.  
  6. public class HashsetExample{
  7.  
  8. public static void main(String[] args) {
  9.   
  10. //create object of HashSet
  11.  HashSet<Integer> hashSet = new HashSet();
  12.        
  13.  //add elements to HashSet object
  14.  hashSet.add(1);
  15.  hashSet.add(2);
  16.  hashSet.add(3);
  17.  hashSet.add(4);
  18.  hashSet.add(5);
  19.      
  20. Object[] objArray = hashSet.toArray();
  21.  
  22. //display contents of Object array
  23. System.out.println("HashSet elements are copied into an Array. Now Array Contains..");
  24.  
  25.  for(int index=0; index < objArray.length ; index++)
  26.   System.out.println(objArray[index]);

  27.  
  28. System.out.println("Hashset contains");
  29.  
  30. Iterator it=hashSet.iterator();
  31.              
  32. while(it.hasNext()){
  33. System.out.println(it.next());
  34.                      
  35. }   
  36.  
  37. }
  38.  
  39. }
     



Output:

  1. HashSet elements are copied into an Array. Now Array Contains..
  2. 1
  3. 2
  4. 3
  5. 4
  6. 5
  7. Hashset contains
  8. 1
  9. 2
  10. 3
  11. 4
  12. 5

Instance Of Java

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