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file-size difference while downloading file

I'm working on a Java file downloader, so I just downloaded a video file with app and without app, so I saw file-size differences between that files. And I couldn't open the file which I downloaded by using my Java app. When I open them using Notepad++, I saw randomly generated symbols inside. What am I doing so wrong?
http://i.imgur.com/lKaofVg.png - here, as you can see randomly generated question marks there.
http://i.imgur.com/8bLC2R7.png - but in the original file, they doesn't exist.
http://i.imgur.com/H3MGgwl.png - here's the file sizes, I just placed "+" for the generated file.
Here's my code:
String currentRange = "bytes=0-"+num*13107200;
System.out.println(num + " is executing");
URL file = new URL(url);
FileOutputStream stream = new FileOutputStream("tmp"+num+".mp4");
HttpURLConnection urlConnection = (HttpURLConnection) file.openConnection();
urlConnection.setRequestProperty("Range", currentRange);
urlConnection.connect();
BufferedReader in = new BufferedReader(new InputStreamReader(
urlConnection.getInputStream()));
String inputLine;
final PrintStream printStream = new PrintStream(stream);
while ((inputLine = in.readLine()) != null)
printStream.println(inputLine);
in.close();
printStream.close();

I solved by using this code, thanks to this question: Reading binary file from URLConnection and #piet.t
InputStream input = urlConnection.getInputStream();
byte[] buffer = new byte[4096];
int n = - 1;
while ( (n = input.read(buffer)) != -1)
{
stream.write(buffer, 0, n);
}

Read any file as a binary string

As the title suggests, is there any way to read a binary representation of a given file (.txt, .docx, .exe, etc...) in Java (or any other language)?
In java, I know how to read the content of a file as is, i.e:
String line;
BufferedReader br = new BufferedReader(new FileReader("myFile.txt"));
while ((line = br.readLine()) != null) {
System.out.println(line);
}
But I'm not sure (if it's possible) to read a binary representation of the file itself.

File file = new File(filePath);
byte[] bytes = new byte[(int)file.length()];
DataInputStream dataInputStream = new DataInputStream(new BufferedInputStream(new FileInputStream(filePath)));
dataInputStream.readFully(bytes);
dataInputStream.close();
bytes is a byte array with all of the data of the file in it

How to access data in InputStream as String?

I am trying to create an android client and java server application using socket programming. I need to retrieve the file send from java server but i dont want to write that content into another file in client side. Instead i want to create a listbox with the contents in the received file. I can find code for write these contents in a file but I dont know how to access the contents as strings.
Here is the code i tried:
Android client
client=new Socket("10.0.2.2", 7575);
writer=new PrintWriter(client.getOutputStream(),true);
writer.write(mMsg);
writer.flush();
writer.close();
InputStream is=client.getInputStream();
bytesread=is.read(mybytearray,0,mybytearray.length);
I changed my code as follws but it is not working.
InputStream is=client.getInputStream();
BufferedReader bf=new BufferedReader(new InputStreamReader(is));
String value=bf.readLine();

Wrap your inputstream into a BufferedReader
BufferedReader d
= new BufferedReader(new InputStreamReader(is));
and use readLine() method.
Reads a line of text. A line is considered to be terminated by any one
of a line feed ('\n'), a carriage return ('\r'), or a carriage return
followed immediately by a linefeed.

Try this:
InputStream is=client.getInputStream();
bytesread=is.read(mybytearray,0,mybytearray.length);
// Create a new String out of the bytes read
String data = new String(mybytearray, 0, bytesread, CharSet);
OR
Wrap the InputStream using BufferedReader and read the data line by line (using readLine()) in String format.

Using buffered reader is best or you can try the code below:
After the last statement use the byte[] "mybytearray" to convert to string as below:
if(bytesread > 0)
String result = new String(mybytearray);

JAVA IO : Issue with reading a stream using BufferedReader

am trying to read a JSON response using buffered reader as shown below. I'm using Apache Commons Http client. Response comes as a single line JSON and no of characters are around 1060000 and size is approximately 1 MB. Problem am facing is only part of stream is read by reader and other part is missing. How can i read the full JSON without losing any data.? Is this related to 'CharBufferSize' of BufferedReader or no of characters in the stream ?
InputStream stream = method.getResponseBodyAsStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(stream, "UTF-8"));
StringBuilder builder = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
builder.append(line);
}

try using a json parser.
import org.codehaus.jackson.*;
JsonFactory fac = new JsonFactory();
JsonParser parser = fac .createJsonParser(stream);

If you just want to copy the complete stream into the StringBuilder, you should use the InputStreamReader and a char-array buffer.
InputStream stream = method.getResponseBodyAsStream();
InputStreamReader reader = new InputStreamReader(stream, "UTF-8");
StringBuilder builder = new StringBuilder();
char[] buffer = new char[4096];
int read;
while ((read = reader.read(buffer)) != -1) {
builder.append(buffer, 0, read);
}

Finally i was able to solve using the IOUtils in Apache Commons library. Here is the code.
BoundedInputStream boundedInputStream= new BoundedInputStream(stream);
BufferedReader reader = new BufferedReader(new InputStreamReader(boundedInputStream,"UTF-8"));
StringBuilder builder= new StringBuilder();
StringBuilderWriter writer = new StringBuilderWriter(builder);
IOUtils.copy(reader, writer);
Although it is been a while, it may be helpful for someone.
Here is the original source,
Most Robust way of reading a file or stream using Java (To prevent DoS attacks)

Character looks like "?" at Reading the Content of an Uploaded File

I have a client that uploads a vcf file, and I get this file at server side and reads it contents and saves them to a txt file. But there is a character error when I try read it, if there is turkish characters it looks like "?". My read code is here:
FileItemStream item = null;
ServletFileUpload upload = new ServletFileUpload();
FileItemIterator iterator = upload.getItemIterator(request);
String encoding = null;
while (iterator.hasNext()) {
item = iterator.next();
if ("fileUpload".equals(item.getFieldName())) {
InputStreamReader isr = new InputStreamReader(item.openStream(), "UTF-8");
String str = "";
String temp="";
BufferedReader br = new BufferedReader(isr);
while((temp=br.readLine()) != null){
str +=temp;
}
br.close();
File f = new File("C:/sedat.txt");
BufferedWriter buf = new BufferedWriter(new FileWriter(f));
buf.write(str);
buf.close();
}

BufferedWriter buf = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(f), "UTF-8"));
If this is production code, i would recommend writing the output straight to the file and not accumulating it in the string first. And, you could avoid any potential encoding issues by reading the source as an InputStream and writing as an OutputStream (and skipping the conversion to characters).