gistfile1.txt

public void backupFile()
 {
		DataInputStream in = null;
		DataOutputStream out = null;

		try {
			in = new DataInputStream(new FileInputStream(f1));
			out = new DataOutputStream(new FileOutputStream(fBackup));
			try {

				while (true) {
					Byte dataIn = in.readByte();
					out.writeByte(dataIn);

				}

			} catch (IOException e) {
				System.out.println("Finished backing up");
				// e.printStackTrace();
			}

		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			try {
				in.close();
				out.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}

		}

	}