textresource.java

主要是对串口驱动的的一些控制源码！！！ 在下载javacomm20-win32.zip后就可以使用。

package de.fhm.jkf.launch.cl;

import java.util.PropertyResourceBundle;
/**
 * @author Theodor Willax
 *
 * <br><br><center><table border="1" width="80%"><hr>
 * <strong><a href="http://jkf.sourceforge.net">The JKF Project</a></strong>
 * <p>
 * Copyright (C) 2002 by Theodor Willax
 * <p>
 * This library 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.
 * <p>
 * This library 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.
 * <p>
 * You should have received a copy of the <a href="http://www.gnu.org/copyleft/lesser.html">
 * GNU Lesser General Public License</a> along with this library; if not, write to
 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA  02111-1307  USA
 * <hr></table></center>
 *
 * This class contains the resources given to the <tt>application.properties</tt>
 * file, which is packed to the launcher archive from the <tt>LaunchServlet</tt>.
 * 
 * @see de.fhm.jkf.launch.sv.LaunchServlet
 */
public class TextResource {
    /**
     * The resource bundle where strings are looked up.
     */
    private static PropertyResourceBundle bundle = null;
    
    /**
     * Instance count for this class.  If it drops to zero (in finalize()), 
     * then the static resource bundle will be released.
     */
    private static int instanceCount = 0;

    /**
     * Creates a new TextResource.  If <tt>instanceCount</tt> is zero, a new 
     * resource bundle is allocated.  Increments the instance count by one.
     * <tt>application.properties</tt> will be loaded (root dir of jar archive).
     */
    public TextResource() {
        if (instanceCount == 0) {
            bundle = (PropertyResourceBundle)
                PropertyResourceBundle.getBundle("application");
        }
        instanceCount++;
    }

    /**
     * Retrieves the value for the given key from this resource bundle.
     *
     * @param key the key to look for.
     * @return the value to the given key or the empty string if key not found.
     */
    public String getString(String key) {
        try {
            return bundle.getString(key);
        } catch (java.util.MissingResourceException e) {
            System.err.println("value for key " + key + " in locale " +
                bundle.getLocale() + " not found");
            e.printStackTrace();
            return "";
        }
    }
    
    /**
     * Releases the static resource bundle if no more instances of
     * this class are alive.  Just to save memory if we have a large
     * resource file.
     */
    protected void finalize() {
        instanceCount--;
        if (instanceCount == 0) {
            System.out.println("releasing " + this);
            bundle = null;
        }
    }

}