public class Copy3
{
   public static void main(String[] args)
   {
 
      double[] a = {5.1, 2.2, 3.4};
      double[] b = {1.2, 4.6, 2.4, 8.1};

      System.out.println("a.length = " + a.length );
      for ( int i = 0; i < a.length; i++ )
         System.out.println( a[i] );


      a = b;                // a is now an alias for b

      System.out.println("a.length = " + a.length );
      for ( int i = 0; i < a.length; i++ )
         System.out.println( a[i] );
   }
}