Here you can find the source of getMessage(String key)
public static String getMessage(String key)
//package com.java2s; /*// www .j a v a 2 s.c o m * Copyright (c) 1999, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ import java.util.ResourceBundle; import java.text.MessageFormat; public class Main { private static ResourceBundle fBundle; public static String getMessage(String key) { return fBundle.getString(key); } public static String getMessage(String key, String fill) { Object[] args = { fill }; return MessageFormat.format(fBundle.getString(key), args); } public static String getMessage(String key, String[] fill) { return MessageFormat.format(fBundle.getString(key), fill); } }