Cert Obj Read and change file and directory attributes
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| [8.3.1]objective | Read and change file and directory attributes, focusing on the BasicFileAttributes, DosFileAttributes, and PosixFileAttributes interfaces.
🗑
|
||||
| [8.3.2] Prior to nio.2 we were using File | file.canWrite(), file.canRead() eg File file = new File("test");
file.lastModified();
🗑
|
||||
| [8.3.3] After Java 7 we can use Files | Path path = Paths.get("test");
Files.getLastModifiedTime(path);
🗑
|
||||
| [8.3.4]BasicFileAttributes | "attributes common to many file systems." What they mean is that you can rely on these attributes being available to you unless you are writing Java code for some funky new operating system. Basic attributes include things like creation date.
🗑
|
||||
| [8.3.5]PosixFileAttributes | POSIX stands for Portable Operating System Interface. This interface is implemented by both UNIX- and Linux-based
operating systems.
🗑
|
||||
| [8.3.6]DosFileAttributes | DOS stands for Disk Operating System. It is part of all Windows operating systems. Even Windows 8 has a DOS prompt available.
🗑
|
||||
| [8.3.7]The BasicFileAttributes and BasicFileAttributeView interfaces are a bit confusing. They have similar names but different functionality, and you get them in different ways. Try to remember these three things: | ■ Only BasicFileAttributeView is singular.
■ You get BasicFileAttributeView using Files.getFileAttributeView, BasicFileAttributes using Files.readAttributes.■ You can ONLY update attributes in BasicFileAttributeView, not in BasicFileAttributes.
🗑
|
||||
| [8.3.8]There is an alternative way to set these attributes where you don't have to worry about the String values. However, the exam wants you to know how to use Files. It is good to know both ways, though. | DosFileAttributeView view = Files.getFileAttributeView(path,
DosFileAttributeView.class);
view.setHidden(true);
view.setReadOnly(true);
🗑
|
||||
| [8.3.9] |
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
MVK2013
Popular Computers sets