摘要：
1.利用StringBuilder ，StringBuffer实现翻转 String test = "wangguoshun"; StringBuilder sb = new StringBuilder(); StringBuilder reverse = sb.append(test).rever 阅读全文
摘要：
String test = "wangguoshun"; char[] array = test.toCharArray(); for(int i=array.length;i>=0;i--){ system.out.println(array[i]); } 报错： Exception in thr 阅读全文