Mega Code Archive
Inserts an Object into an Object array at the index position
<![CDATA[
import java.lang.reflect.Array;
/*********************************************************************
* Array manipulation for Java 1.1+.
*
* <p>
* Java 1.1 compatible.
* </p>
*
* @see
* ArrayLib2
*
* @version
* 2003-04-07
* @since
* 2001-04-06
* @author
* <a href="http://croftsoft.com/">David Wallace Croft</a>*/
public class Util{
/*********************************************************************
* Inserts an Object into an Object array at the index position.
*
* <p>
* Example:
* <code>
* <pre>
* String [ ] stringArray
* = ( String [ ] ) ArrayLib.insert ( new String [ ] { }, "", 0 );
* </pre>
* </code>
* </p>
*
* @throws NullArgumentException
*
* If objectArray or o is null.
*
* @throws IndexOutOfBoundsException
*
* If index < 0 or index > objectArray.length.
*
* @return
*
* Returns a new array with the same component type as the old array.
*********************************************************************/
public static Object [ ] insert (
Object [ ] objectArray,
Object o,
int index )
//////////////////////////////////////////////////////////////////////
{
if ( ( index < 0 )
|| ( index > objectArray.length ) )
{
throw new IndexOutOfBoundsException (
"index out of range: " + index );
}
Object [ ] newObjectArray = ( Object [ ] ) Array.newInstance (
objectArray.getClass ( ).getComponentType ( ),
objectArray.length + 1 );
System.arraycopy ( objectArray, 0, newObjectArray, 0, index );
newObjectArray [ index ] = o;
System.arraycopy ( objectArray, index, newObjectArray, index + 1,
objectArray.length - index );
return newObjectArray;
}
}
]]>