Read that file!

Question

I am looking for a fast way to put all the data from a file into a string. By fast, I am looking for 1 megabyte in about 5 seconds or less. Is this possible, and how should i go about doing this?

Answer 1

gilroitto wrote:
1 Mb in 5 seconds sounds extremely slow. Normal FileInputStream and new String should give you 20 Mb/second on a not very impressive computer.
File f=...
FileInputStream fIn=new FileInputStream(f);
byte[] buff=new byte[f.length()];
fIn.read(buff);
String data=new String(buff,encoding);
This is not guaranteed to work since the InputStream.read() method does not guarantee to read all the bytes. If one is not going to use a standard library then one should wrap the input stream in a DataInputStream and use the readFully() method.
Also f.length() return a long so it has to be cast to an int to be usable in defining the length of the buffer.