stringutil.java

J2me实现的MSN Messeger客户端程序。聊天、添加好友、删除好友、阻止好友

/*
 * @(#)StringUtil.java
 *
 * Copyright (c) 2001-2002, JangHo Hwang
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 	1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *
 * 	2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *
 * 	3. Neither the name of the JangHo Hwang nor the names of its contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *    $Id: StringUtil.java,v 2.0 2004/12/21 16:15:08 chenzs Exp $
 */
package vitular.msnp.util;

//import java.security.MessageDigest;
//import java.util.StringTokenizer;
//import vitular.msnp.UserStatus;

/**
 * String v锟桔匡拷 锟斤拷锟斤拷 Utility锟斤拷 d锟斤拷藜业锟斤拷; 锟斤拷锟斤拷锟?锟街达拷 努锟斤拷锟斤拷锟教达拷.
 *
 * @author Jang-Ho Hwang, [e-mail]
 * @version $Id: StringUtil.java,v 2.0 2004/12/21 16:15:08 chenzs Exp $
 */
public class StringUtil {
  /**
   * 锟街撅拷锟斤拷 origin 锟斤拷锟节匡拷锟斤拷锟斤拷 src 锟斤拷锟节匡拷; 锟斤拷锟?茫锟斤拷 dest 锟斤拷锟节匡拷锟斤拷 锟斤拷锟斤拷锟斤拷锟截达拷.
   */
  public static String replaceString(String origin, String src, String dest) {
    if (origin == null)return null;
    StringBuffer sb = new StringBuffer(origin.length());

    int srcLength = src.length();
//    int destLength = dest.length();

    int preOffset = 0;
    int offset = 0;
    while ( (offset = origin.indexOf(src, preOffset)) != -1) {
      sb.append(origin.substring(preOffset, offset));
      sb.append(dest);
      preOffset = offset + srcLength;
    }
    sb.append(origin.substring(preOffset, origin.length()));

    return sb.toString();
  }
}