/*
 *     file: ObtainingClassInstances.java
 *  package: oreilly.hcj.reflection
 *
 * This software is granted under the terms of the Common Public License,
 * CPL, which may be found at the following URL:
 * http://www-124.ibm.com/developerworks/oss/CPLv1.0.htm
 *
 * Copyright(c) 2003-2005 by the authors indicated in the @author tags.
 * All Rights are Reserved by the various authors.
 *
########## DO NOT EDIT ABOVE THIS LINE ########## */

package oreilly.hcj.reflection;

/**  
 * Demonstration of how to obtain instances of <tt>java.lang.Class</tt>.
 *
 * @author <a href=mailto:kraythe@arcor.de>Robert Simmons jr. (kraythe)</a>
 * @version $Revision: 1.3 $
 */
public class ObtainingClassInstances {
	/** An Integer object */
	protected static Integer someInteger = new Integer(10);

	/** A generic object. */
	protected static Object someObject = null;

	/** A String. */
	protected static String someString = new String("Hardcore Java");

	/** An int. */
	protected static int someInt = 15;

	/** An array of ints. */
	protected static int[] intArray = new int[] { 4, 5, 7, 9 };

	/** 
	 * Main method.
	 *
	 * @param args Command line arguments.
	 */
	public static void main(final String[] args) {
		// -- Print out the Class instances. 
		System.out.println(someInteger.getClass());
		System.out.println(someString.getClass());
		System.out.println(intArray.getClass());
		System.out.println(Object.class);
		System.out.println(Integer.class);
		System.out.println(int.class);
		System.out.println(String.class);
		System.out.println(Comparable.class);
		System.out.println(Object[].class);

		// -- Things that WON'T work
		// System.out.println(someObject.getClass());  // <= Exception 
		// System.out.println(someInt.getClass()); // <= Compiler errror
	}

	/** 
	 * Demonstration of a method that doesnt check for null.
	 *
	 * @param obj The object passed.
	 */
	public void writeClass(final Object obj) {
		System.out.println(obj.getClass());
	}
}

/* ########## End of File ########## */