Having trouble Output streams and text formatting???

Question

Salutaions!
I'm trying to write a peice of code that takes input from a file and outputs it in the following way: (1)Any string of two or more blank space is replaced by a single space. (2)All sentences start with an uppercase letter. Define a sentence as beginning after a ".", "?","!"
This is what I got: Please help!
import java.io.*;
import java.util.*;
public class Empty
private static boolean cap;
private static DataInputStream input;
private static DataOutputStream output;
private static String inputFile, outputFile;
public static void main(String[] args) throws Exception
     input = new DataInputStream(new FileInputStream("a://in.txt"));
     output = new DataOutputStream(new FileOutputStream("a://out.txt"));
     char thisChar, lastChar = ' ';
     while(input.read() != -1)
     thisChar = ((char)input.read());
     if(lastChar != ' ' && thisChar != ' ')
          if(thisChar == '.' || thisChar == '?' || thisChar == '!')
          {    cap = true;
          output.writeChar(thisChar);
          lastChar = thisChar;
          else
          cap = false;
          output.writeChar(thisChar);
          lastChar = thisChar;
     output.close();
     input.close();

Answer 1

one clear mistake i can see in this method is that you r calling input.read() twice every time. once in the if(input.read()..) statement and then in the statement
thisChar = ((char)input.read());
the byte read the first time is not captured anywhere.
do you have some specific motive behind doing this?
luck!
y