Java Program to convert Treesrt to an interger array

1.Basic Java program to copy all elements of treeset to an array

1. package com.TreeSetExamplePrograms;
2. 
   
3. public Class TreeSetDemo{ 
5.  
6. public static void main(String args[]) {
7. //create TreeSet object
8.  TreeSet<Integer> treeSet = new TreeSet<Integer>();
9.        
10.  //add elements to TreeSet
11.   treeSet.add(1);
12.   treeSet.add(3);
13.   treeSet.add(2);
14.   treeSet.add(5);
15.   treeSet.add(6);
16.   treeSet.add(7);
17.   treeSet.add(8);
18.   treeSet.add(9);
19.   treeSet.add(10);
20.         
21.    Object[] objArray = treeSet.toArray();
22.      //display contents of Object array
23.  
24.    System.out.println("TreeSet elements are copied into an Array. Now Array Contains..");
25.  
26.   for(int index=0; index < objArray.length ; index++)
27.       System.out.println(objArray[index]);
28.          
29. }
30. }

Output:

1. TreeSet elements are copied into an Array. Now Array Contains..
2. 1
3. 2
4. 3
5. 5
6. 6
7. 7
8. 8
9. 9
10. 10

2.Java example program to Convert treeset to integer array