java将一个字符串中逗号前的一部分加上单引号

java将一个字符串中逗号前的部分加上单引号
??}
??String result = sb.toString();
??String tp = result.substring(result.length() - 1, result.length());
??if (",".equals(tp))
???return result.substring(0, result.length() - 1);
??else
???return result;
?}

?public static void main(String[] arg) {
??SpiltString ss = new SpiltString();
??String str = ss.spilt("a,b,c,d,e,f");
??System.out.println(str);
?}
}