public class ReadFileExample {

	public static void main(String[] args) {

		File file = new File("Path of the file");
		File NewFile = null;
		FileInputStream fis = null;
		FileOutputStream fop = null;

		try {
			fis = new FileInputStream(file);

			int content;
			while ((content = fis.read()) != -1) { //While you didn't reach EOF
				// check if it is an image starter sequence
				if(content.equals(STARTER SEQUENCE)) {
					//if it is create a new file and start spitting the next bytes there, if not, to the current one
					if (NewFile != null) //If i was'previously writing to a file close it
						NewFile.close();
					NewFile = new File("Path where to save it");
					// if file doesnt exists, then create it
					if (!NewFile.exists()) {
						NewFile.createNewFile();
					}
					fop = new FileOutputStream(NewFile);
				}
				if (fop != null) { //Only if you have an open file you can write to it!
					// get the content in bytes
					byte[] contentInBytes = content.getBytes();

					fop.write(contentInBytes);
					fop.flush();
					fop.close();
				}

			}

		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				if (fis != null)
					fis.close();
			} catch (IOException ex) {
				ex.printStackTrace();
			}
		}
	}
}