按行读取文件内容的错误？

[bbshero]

String sline="";
File file = new File("c:\\ini.txt");
FileInputStream fins=null;
BufferedInputStream bins=null;
DataInputStream dins=null;//--------------------


fins = new FileInputStream(file);
bins = new BufferedInputStream(fins);
dins = new DataInputStream(dins);
try{
while( (sline = dins.readLine()).length() != 0 )
out.print(sline); }
catch(Exception e) {e.printStackTrace();out.print("readall failure失败");}
out.print("-------------end-------------");



总报告说java.lang.NullPointer

[bbshero]

谢谢 pisalin(创新思维) 给分
不过我的为什么不对？

[pisalin]

dins = new DataInputStream(dins);//???
笔误？应该是：dins = new DataInputStream(bins);
吧

[bbshero]

该成(bins)也失败啊！

[pisalin]

试试这样
String sline="";
File f = new File("c:\\ini.txt");
InputStreamReader read = new InputStreamReader (new FileInputStream(f));
BufferedReader dins = new BufferedReader(read);
try{
while( (sline = dins.readLine()).length() != 0 )
out.print(sline); }
catch(Exception e) {e.printStackTrace();out.print("readall failure失败");}
out.print("-------------end-------------");