如何在Java中声明文件路径

Question

I am making an android app that involves an internal database. I decided to open the database file rather than produce it within the app.

this is the code:

private static String databasePath = "H:\Workspace\PetrocVLE\assets";
public SQLiteDatabase db = SQLiteDatabase.openDatabase(databasePath, null, 0);

this is the error that is being given:

Invalid escape sequence (valid ones are \b \t \n \f \r \" \' \\ )

I thought this might mean that there are symbols within the databasePath variable which are not allowed within a string variable, however I have seen other String variables that used these within java.

Can anybody tell me what I am doing wrong? thankyou

Answer 1

\\ is a special character used in Java Strings , you would need to escape it,

private static String databasePath = "H:\\Workspace\\PetrocVLE\\assets";

However, file paths on Android normally take this format

private static String databasePath = "/Workspace/PetrocVLE/assets";

Answer 2

使用/代替，因为它与操作系统无关：

private static String databasePath = "H:/Workspace/PetrocVLE/assets";

Answer 3

您可能还希望独立于驱动器，并引用代表您的驱动器号的变量或尝试使用相对路径 。