I have a file with 3236000 bytes and I want to read 2936000 from start and write to an OutputStream
InputStream is = new FileInputStream(file1); OutputStream os = new FileOutputStream(file2); AFunctionToCopy(is,os,0,2936000); /* a function or sourcecode to write input stream 0to2936000 bytes */
I can read and write byte by byte, but it’s to slow (i think) from buffered reading How can do I copy it?
Advertisement
Answer
public static void copyStream(InputStream input, OutputStream output, long start, long end) throws IOException { for(int i = 0; i<start;i++) input.read(); // dispose of the unwanted bytes byte[] buffer = new byte[1024]; // Adjust if you want int bytesRead; while ((bytesRead = input.read(buffer)) != -1 && bytesRead<=end) // test for EOF or end reached { output.write(buffer, 0, bytesRead); } }
should work for you.