package com.string; import org.apache.log4j.Logger; /** * ³£Óú¯Êý * * @author UODUT * */ public class Functions { public static void main(String[] args) { String str1 = "sdfsdfsdjfk121"; String str2 = " Sd rf d"; char[] c = { 's', 'd', 'r', 'f' }; Logger.getLogger(Functions.class).info(str2.compareTo(str1)); byte[] b = str2.getBytes(); String str3 = ""; Logger.getLogger(Functions.class).info(str3.isEmpty()); Logger.getLogger(Functions.class).info(str2.toUpperCase()); char[] cstr = str2.toCharArray();// ת»»Îª×Ö·ûÊý×é // ºöÂÔÊײ¿ºÍβ²¿¿Õ¸ñ£¬¶ÔÖмäµÄ¿Õ¸ñ²»×ö´¦Àí Logger.getLogger(Functions.class).info(str2.trim()); Logger.getLogger(Functions.class).info(str2.split(" ")[4]); } }