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Copy all elements of Java TreeSet to an Object Array Example

  1. /*
  2.   Copy all elements of Java TreeSet to an Object Array Example
  3.   This Java Example shows how to copy all elements of Java TreeSet object to an
  4.   array of Objects using toArray method.
  5. */
  6.  
  7. import java.util.TreeSet;
  8.  
  9. public class CopyElementsOfTreeSetToArrayExample {
  10.  
  11.   public static void main(String[] args) {
  12.  
  13.     //create object of TreeSet
  14.     TreeSet tSet = new TreeSet();
  15.    
  16.     //add elements to TreeSet object
  17.     tSet.add(new Integer("1"));
  18.     tSet.add(new Integer("2"));
  19.     tSet.add(new Integer("3"));
  20.    
  21.     /*
  22.       To copy all elements of java TreeSet object into array use
  23.       Object[] toArray() method.
  24.     */
  25.    
  26.     Object[] objArray = tSet.toArray();
  27.    
  28.     //display contents of Object array
  29.     System.out.println("TreeSet elements are copied into an Array.
  30.                                                      Now Array Contains..");
  31.     for(int index=0; index < objArray.length ; index++)
  32.       System.out.println(objArray[index]);
  33.   }
  34. }
  35.  
  36. /*
  37. Output would be
  38. TreeSet elements are copied into an Array. Now Array Contains..
  39. 1
  40. 2
  41. 3
  42. */

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