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Copy all elements of Java ArrayList to an Object Array Example

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  1. /*
  2.   Copy all elements of Java ArrayList to an Object Array Example
  3.   This Java Example shows how to copy all elements of Java ArrayList object to an
  4.   array of Objects using toArray method.
  5. */
  6.  
  7. import java.util.ArrayList;
  8.  
  9. public class CopyElementsOfArrayListToArrayExample {
  10.  
  11.   public static void main(String[] args) {
  12.     //create an ArrayList object
  13.     ArrayList arrayList = new ArrayList();
  14.    
  15.     //Add elements to ArrayList
  16.     arrayList.add("1");
  17.     arrayList.add("2");
  18.     arrayList.add("3");
  19.     arrayList.add("4");
  20.     arrayList.add("5");
  21.    
  22.     /*
  23.       To copy all elements of java ArrayList object into array use
  24.       Object[] toArray() method.
  25.     */
  26.    
  27.     Object[] objArray = arrayList.toArray();
  28.    
  29.     //display contents of Object array
  30.     System.out.println("ArrayList elements are copied into an Array.
  31.                                                   Now Array Contains..");
  32.     for(int index=0; index < objArray.length ; index++)
  33.       System.out.println(objArray[index]);
  34.   }
  35. }
  36.  
  37. /*
  38. Output would be
  39. ArrayList elements are copied into an Array. Now Array Contains..
  40. 1
  41. 2
  42. 3
  43. 4
  44. 5
  45. */