网站浏览器兼容性问题吗电商运营的基本流程

<pre name="code" class="java">package com.one;public class DeleteExtraSpace {/*** 题目：给定字符串，删除开始和结尾处的空格，并将中间的多个连续的空格合并成一个。 方法1.用已有的String类的trim和replaceAll方法* 方法 2.全部用正则表达式，这个我不熟 方法 3.“重新发明轮子”，从头遍历一次*/public static void main(String[] args) {String strs = "  hello    world   !  ";String str2 = strs.trim().replaceAll(" +", " ");System.out.println(str2 + ",length2=" + str2.length());String str3 = deleteExtraSpace(strs);System.out.println(str3 + ",length3=" + str3.length());System.out.println(str2.equals(str3));System.out.println("=========================");}public static String deleteExtraSpace(String str) {if (str == null) {return null;}if (str.length() == 0 || str.equals(" ")) {return new String();}char[] oldStr = str.toCharArray();int len = str.length();char[] tmpStr = new char[len];boolean keepSpace = false;int j = 0;// the index of new stringfor (int i = 0; i < len; i++) {char tmpChar = oldStr[i];if (oldStr[i] != ' ') {tmpStr[j++] = tmpChar;keepSpace = true;} else if (keepSpace) {tmpStr[j++] = tmpChar;keepSpace = false;}}//判断结尾空格// unlike c/c++,no "\0" at the end of a string. So,do the copy again...int newLen = j;if (tmpStr[j - 1] == ' ') {newLen--;}char[] newStr = new char[newLen];for (int i = 0; i < newLen; i++) {newStr[i] = tmpStr[i];}return new String(newStr);}
}