where does the method SQLiteOpenHelper.getReadableDatabase() look to get the database?

Question

The docs that come with class SQLiteOpenHelper do not say which directory its method getReadableDatabase looks to obtain the database.

I am trying to understand the need the statement on line 31 this.getReadableDatabase in the following code snippet from RIP tutorial:

01 public DatabaseHelper(Context context) {
02         super(context, DB_NAME, null, 1);
03         this.myContext = context;
04         ContextWrapper cw = new ContextWrapper(context);
05         // The line below will define the path to the database file in the apps file directory
06         // as being the internal file directory/databases/
07         DB_PATH = cw.getFilesDir().getAbsolutePath() + "/databases/";
08         Log.e(TAG, "Databasehelper: : DB_PATH is: " + DB_PATH);
09         outFileName = DB_PATH + DB_NAME;
10         File file = new File(DB_PATH);
11         Log.e(TAG, "DatabaseHelper does file exist? : " + file.exists());
12         // File file is just the directory part of entire path so file.mkdir() ensures the
13         // directory is created.
14         if (!file.exists()) {
15             file.mkdir();
16         }
17 
18     }
19 
20     /*
21      * Creates empty data database on the system and rewrites it with your own database.
22      */
23 
24     public void createDatabase() throws IOException {
25         boolean dbExist = checkDatabase();
26         if (dbExist) {
27             // do nothing - database already exists
28         } else {
29             // By calling this method an empty database will be created into the files directory
30             // of your app. We will be able to overwrite this database with our database
31             this.getReadableDatabase();
32             try {
33                 copyDatabase();
34             } catch (IOException e) {
35                 throw new Error("Error copying database");
36             }
37         }
38     }
,,,

Answer 1

Line super(context, DB_NAME, null, 1); sets the database name used that is always in your App's private "database" directory