函数库分为静态库和动态库两种。静态库在程序编译时会被连接到目标代码中
// // StrReplace.java // package forum; import java.util.*; /** * Title: * Description: * Copyright: Copyright (c) 2001 * Company: * @author * @version 1.0 */ public class StrReplace { public StrReplace() { } public String str_replace(String from,String to,String source) { StringBuffer bf= new StringBuffer(""); StringTokenizer st = new StringTokenizer(source,from,true); while (st.hasMoreTokens()) { String tmp = st.nextToken(); System.out.println("*"+tmp); if(tmp.equals(from)) { bf.append(to); } else { bf.append(tmp); } } return bf.toString(); } } // 使用方法