Java Reference
In-Depth Information
Discussion
The
Path
object performs many of the same functions as the original
File
object. For
simplest cases, its usage is similar, except you get an instance from the
Paths
factory class
instead of by direct instantiation:
Path p
=
Paths
.
getPath
(
“
/
home
/
ian
/.
profile
”
);
iif
(!
p
.
exists
()) {
// some warning here
}
else
else
{
// use p.size() etc.
}
One way that
Path
goes beyond the original is in the ability (by calling its
register()
method) to set up a Watcher Service (see
Using the FileWatcher Service to Get Notified
about File Changes
)
to get notified of changes to a filesystem entry (such as new files created
in a directory).
The
Files
class contains an array of methods for dealing with file paths, including:
▪ Copying
▪ Moving
▪ Deleting
The
PathsFilesDemo
program shown here illustrates some of these operations:
Path p
=
Paths
.
get
(
"my_junk_file"
);
boolean
boolean
deleted
=
Files
.
deleteIfExists
(
p
);
InputStream is
=
PathsFilesDemo
.
class
.
getResourceAsStream
(
"/demo.txt"
);
long
long
newFileSize
=
Files
.
copy
(
is
,
p
);
System
.
out
.
println
(
newFileSize
);
final
final
Path realPath
=
p
.
toRealPath
();
System
.
out
.
println
(
realPath
);
realPath
.
forEach
(
pc
->
System
.
out
.
println
(
pc
));
Files
.
delete
(
p
);
Create an abstract
Path
