为什么不能 排序
public   class   WordCount   {
private   Map   m   =   new   HashMap();

private   String   str   =   " ";

private   Pattern   pattern;

public   WordCount(String   filename)   throws   Exception   {
BufferedReader   in   =   new   BufferedReader(new   FileReader(
new   File(filename)));
String   s;
String[]   strAry   =   new   String[((int)   new   File(filename).length())   /   2];
while   ((s   =   in.readLine())   !=   null)  
str   +=   s   +   "   ";

Matcher   match     =   Pattern.compile( "[a-zA-Z]+ ").matcher(str);
for   (int   i   =   0;match.find();i++)
strAry[i]   =   match.group();
Arrays.sort(strAry);
//这里排序会抛出异常,无法排序，为什么?
}


------解决方案--------------------
抛什么异常了? 如果是no pointer应该是因为你的数组strAry里边有些string是null
------解决方案--------------------
数组容量过大
有许多空值
把数组容量改了
就对了