/*
 * T01n16.java -- A demonstration of wrapper classes and autoboxing and
 * unboxing.  See comments below.
 */

//import java.util.*;

public class T01n16
{
    public static void main (String [] args)
    {
        Integer intObject1, intObject2;  // Wrapper class objects for the demo
        int     content1, content2;      // To hold wrapper object content

                /*  The following is how you had to place primitive types
                 *  in wrapper objects (and extract them) before Java 1.5.
                 *  It looks like you'd probably expect it to look.
                 *  Trouble is, it's a pain -- lots of clutter to do
                 *  something ordinary.
                 */

        intObject1 = new Integer (17);    // Create our own "box" (wrapper)
        content1 = intObject1.intValue(); // Explicitly access box conent
        System.out.println("The value held in intObject1 is " + content1);

                /*  In Java 1.5 and later, we can mix previously
                 *  incompatible items to satisfy our goal of reducing
                 *  clutter.  Java still does the same stuff as we used to
                 *  have to do, it just automates it for us.  This may not
                 *  seem like a big deal, but it can really clean up code
                 *  that would otherwise be a huge mess.
                 */

        intObject2 = 22;         // This demonstrates autoboxing.
        content2 = intObject2;   // And this is unboxing.
        System.out.println("The value held in intObject2 is " + content2);
    }

}