content: // ===============================================================================
  // Authors: AFRL/RQQD
  // Organization: Air Force Research Laboratory, Aerospace Systems Directorate, Power and Control Division
  // 
  // Copyright (c) 2017 Government of the United State of America, as represented by
  // the Secretary of the Air Force.  No copyright is claimed in the United States under
  // Title 17, U.S. Code.  All Other Rights Reserved.
  // ===============================================================================
  
  /*
   * GRAL: GRAphing Library for Java(R)
   *
   * (C) Copyright 2009-2013 Erich Seifert <dev[at]erichseifert.de>,
   * Michael Seifert <mseifert[at]error-reports.org>
   *
   * This file is part of GRAL.
   *
   * GRAL 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 3 of the License, or
   * (at your option) any later version.
   *
   * GRAL 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.
   *
   * You should have received a copy of the GNU Lesser General Public License
   * along with GRAL.  If not, see <http://www.gnu.org/licenses/>.
   */
  package de.erichseifert.gral.util;
  
  import java.util.MissingResourceException;
  import java.util.ResourceBundle;
  
  /**
   * Singleton class that globally provides translated message texts.
   */
  public abstract class Messages {
  	/** Name of resource bundle that contains message texts. */
  	private static final String BUNDLE_NAME = "messages"; //$NON-NLS-1$
  
  	/** Resource bundle that contains message texts. */
  	private static final ResourceBundle RESOURCE_BUNDLE = ResourceBundle
  			.getBundle(BUNDLE_NAME);
  
  	/**
  	 * Private constructor.
  	 */
  	private Messages() {
  	}
  
  	/**
  	 * Returns a message text that is determined by the specified key.
  	 * A replacement text generated from the key is returned if the message
  	 * cannot be found.
  	 * @param key Key string that identifies the message
  	 * @return Translated message text, or default key if the message cannot
  	 *         be found.
  	 */
  	public static String getString(String key) {
  		try {
  			return RESOURCE_BUNDLE.getString(key);
  		} catch (MissingResourceException e) {
  			return '!' + key + '!';
  		}
  	}
  }
  