Help,DataInputStream and Unicode encoding problem

Question

Hello,everybody
I am writing a small software for fun,but an problem about Unicode encoding stopped me. I tried to parse a file including integers,floats and Unicode characters(not UTF-8 but some other encoding type). I looked for the JDK documentation and I found that the class DataInputStream( implementing the interface DataInput) fitted my requirement best, then I tried but the Unicode characters are not read correctly( messy codes,only '????????').
would you please help me? thanks a lot :-)

Answer 1

the class DataInputStream has the methods useful to me, but find there is no method to set the encoding format ,both in DataInputStream and argument types used in its constructor:
FileInputStream fis=new FileInputStream(fileName);
DataInputStream     dis=new DataInputStream(fis);
String line =dis.readLine();               System.out.println(line);
// only "????????" output as result :-(
I wonder how to set the encoding type,or another class.
if I do it this way,it works,but there is no methods such as "readFloat","readInt",etc, so it's not what I want :
FileInputStream fis=new FileInputStream(fileName);
InputStreamReader read=new InputStreamReader(fis,"GB2312");
BufferedReader reader=new BufferedReader(read);
DataInputStream     dis=new DataInputStream(fis);
String line = reader.readLine();
System.out.println(line);
thank you for your repley!