return an Object array for the given object.

  
import java.lang.reflect.Array;

/*
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 * Copyright 2005, JBoss Inc., and individual contributors as indicated
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

public class Main {


  /**
   * @return an Object array for the given object.
   *
   * @param obj  Object to convert to an array.  Converts primitive
   *             arrays to Object arrays consisting of their wrapper
   *             classes.  If the object is not an array (object or primitve)
   *             then a new array of the given type is created and the
   *             object is set as the sole element.
   */
  public static Object[] toArray(final Object obj) {
     // if the object is an array, the cast and return it.
     if (obj instanceof Object[]) {
        return (Object[])obj;
     }

     // if the object is an array of primitives then wrap the array
     Class type = obj.getClass();
     Object array; 
     if (type.isArray()) {
        int length = Array.getLength(obj);
        Class componentType = type.getComponentType();
        array = Array.newInstance(componentType, length);
        for (int i=0; i<length; i++) {
           Array.set(array, i, Array.get(obj, i));
        }
     }
     else {
        array = Array.newInstance(type, 1);
        Array.set(array, 0, obj);
     }

     return (Object[])array;
  }
}

1.	Creating an Array: An array of 10 ints.
2.	Creating an Array: An array of 10 int-arrays.
3.	Creating an Array: A 10x20 2-dimensional int array.
4.	Getting and Setting the Value of an Element in an Array Object
5.	Array Reflection: name and type
6.	Array Reflection: getComponentType()
7.	Array Reflection: create instance
8.	Array Reflection: get length
9.	Array Reflection: Multi Array Reflection
10.	Using reflection to check array type and length
11.	Using reflection to create, fill, and display an array
12.	Getting the Length and Dimensions of an Array Object
13.	Determining If an Object Is an Array
14.	Getting the Component Type of an Array Object
15.	Check if the given object is an array (primitve or native).
16.	This program demonstrates the use of reflection for manipulating arrays

return an Object array for the given object. : Array Reflection « Reflection « Java

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