FileInputStream fileInputStream=null;

File myFile = new File("C:\\myFile.txt");

byte[] byteFile = new byte[(int) myFile.length()];

try {

fileInputStream = new FileInputStream(myFile);
fileInputStream.read(byteFile);
fileInputStream.close();

FileOutputStream fileOuputStream = new FileOutputStream("C:\\toFile.txt");
fileOuputStream.write(bFile);
fileOuputStream.close();