protected boolean writeDVD(DVD dbject) {
		if ( mainWriteHandle == null ) {
			return false;
		}
		if (dbject == null) {
			return false;
		}
		mainWriteHandle.println();
		mainWriteHandle.println("DVDObjectB");
		mainWriteHandle.println(dbject.getTitle());	// String
		mainWriteHandle.println(dbject.getID());	// Long
		mainWriteHandle.println(dbject.getYear());	// int
		mainWriteHandle.println(dbject.getAmount());	// int
		mainWriteHandle.println(dbject.getBuyPrice());	// double
		mainWriteHandle.println(dbject.getRentPrice());	// double
		mainWriteHandle.println(dbject.getRentAmount());	// int
		mainWriteHandle.println(dbject.canSell());	// bool
		mainWriteHandle.println(dbject.canRent());	// bool
		// δչĲλ
		mainWriteHandle.println("DVDObjectSB");
		mainWriteHandle.println(dbject.styleGetSize());	// int
		for (Long a : dbject.styleGetAll()) {
			mainWriteHandle.println(a);	// Long
		}
		mainWriteHandle.println("DVDObjectSE");
		mainWriteHandle.println("DVDObjectE");
		return true;
	}