package isoj2me;import java.util.*;import javax.microedition.lcdui.*;/** * <p> * isoj2me: Utility * </p> * <p> * This class contains utility methods. * </p> * <p> * Copyright: Copyright (c) 2006 * </p> * <p> * License: Lesser GPL (http://www.gnu.org) * </p> * <p> * Company: <a href=http://www.mondonerd.com target="_blank">Mondonerd.com</a> * </p> *  * @author Massimo Maria Avvisati * @version 0.5 */public class Utility {	public Utility() {	}	/**	 * This method return an Image loading it from the "hard disk" of the mobile	 * phone (from the standard directory) or, if the image was already loaded,	 * it return an image took from an hashtable	 * 	 * @param imageCode	 *            alphanumeric code for this image (filename)	 * @param imagesHash	 *            where to store Image objects	 * @return the requested Image	 */	private static Image temp_image;	public static Image loadImage(String imageCode, Hashtable imagesHash) {        if (imagesHash == null) {            imagesHash = new Hashtable();        }        if (imagesHash.size() > 12) { //TODO            imagesHash.clear();            //System.gc();            //System.out.println("Cache (" + imagesHash.toString() + ") empty");        }        		if (imagesHash.containsKey(imageCode)) {			return (Image) imagesHash.get(imageCode);		} else {						try {				temp_image = Image.createImage("/" + imageCode + ".png");                //System.out.println("Loaded: " + "/" + imageCode + ".png");				imagesHash.put(imageCode, temp_image);                if (temp_image != null) {				return (Image) imagesHash.get(imageCode);                } else {                    System.gc();                    imagesHash.clear();                    temp_image = Image.createImage("/" + imageCode + ".png");                    //System.out.println("Loaded extra: " + "/" + imageCode + ".png");                    imagesHash.put(imageCode, temp_image);                    return (Image) imagesHash.get(imageCode);                }			} catch (Exception ex) {				System.out.println("loadImage Error can't load " + imageCode						+ ":" + ex);			}		}        Image temp = Image.createImage(1, 1);		return temp;	}       }