JAVA删除字符串的最后字符 java 拼接字符串时，去掉最后一个多余的逗号分号。
for (int t = 0; t < memberLen; t++) {
memTemp = stafferMap.get(strMember[t]);
if(memTemp != null){
memberNames += memTemp + “,”;
}
}
以上的代码，拼接的字符串会多一个“，”,比如：”str1,str2,str3,”，要去除str3后的逗号，可用如下方法：
memberNames = memberNames.substring(0,memberNames.length()-1);
比如当Team1=test ‘, ‘U1-Team ‘, ‘V-Team ‘, ‘时
如何改成:
Team1= ‘test ‘, ‘U1-Team ‘, ‘V-Team ‘
可用：
Team1 = ” ‘ ” + Team1.Substring(0, Team1.Length – 2);
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字符串：string s = “1,2,3,4,”
实现效果：删除最后一个 “,”
方法：
1.用Substring
s = s.Substring(0,s.Length – 1)
2.用 RTrim
s = s.ToString().RTrim(‘,’)
3.用TrimEnd
s=s.TrimEnd(‘,’)
//如果要删除”4,”，则需要这么写
char[] MyChar = {’4′,’,'};
s = s.TrimEnd(MyChar);
//s = “1,2,3
4.用lastIndexOf()和deleteCharAt()
int index = sb.toString().lastIndexOf(‘,’);
sb.deleteCharAt(index);