Setting file permissions using java.io.File methods

Question

I'm using java.io.File methods: setReadable, setWritable, setExecutable to set file permissions. However, in spite of using these methods the permissions are always set to the default settings. Why is that?

andrewmu · Accepted Answer · 2017-10-02 11:15:51Z

3

These methods are not always supported by the underlying filesystem. E.g. it's not possible to make a point unreadable in NTFS on Windows XP.

There's more information here: www.oracle.com, under "Setting File and Directory Permissions"

edited Oct 2, 2017 at 11:15

answered Dec 4, 2010 at 17:06

andrewmu

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2 Comments

Steve Powell Over a year ago

It's not possible to make a file unreadable in Windows NTFS. The methods ought to return true or false, depending upon whether they worked or not.

LarryW Over a year ago

I believe that the article @andewmu linked to has been moved here: More Enhancements in Java SE 6. There's also the java.nio.file.Files class of static methods, added in Java SE 7.

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