java——getString（1）在从数据库获取信息方面意味着什么？

这里有一个关于从数据库读取数据的教程。我的问题是：

getString中的数字是否表示方法从中获取字符串的字段？

方法如下：

public ArrayList readCourses() {
        // on below line we are creating a
        // database for reading our database.
        SQLiteDatabase db = this.getReadableDatabase();
  
        // on below line we are creating a cursor with query to read data from database.
        Cursor cursorCourses = db.rawQuery("SELECT * FROM " + TABLE_NAME, null);
  
        // on below line we are creating a new array list.
        ArrayList courseModalArrayList = new ArrayList<>();
  
        // moving our cursor to first position.
        if (cursorCourses.moveToFirst()) {
            do {
                // on below line we are adding the data from cursor to our array list.
                courseModalArrayList.add(new CourseModal(cursorCourses.getString(1), 
cursorCourses.getString(4), 
                                             cursorCourses.getString(2), 
                                             cursorCourses.getString(3)));
            } while (cursorCourses.moveToNext());
            // moving our cursor to next.
        }
        // at last closing our cursor 
        // and returning our array list.
        cursorCourses.close();
        return courseModalArrayList;
}