Java Reference
In-Depth Information
Figure 8-10.
A dialog box appears when you leave the Start directory textfield empty, or when
you enter a path to a filename or a nonexistent directory in this textfield.
EXERCISES
Thefollowingexercisesaredesignedtotestyourunderstandingof
File
andvarious
stream and writer/reader APIs:
1. Create an application named
Touch
for setting a file's or directory's
timestamptothecurrentorspecifiedtime.Thisapplicationhasthefollowing
usage syntax:
java Touch [-d
timestamp
]
pathname
. If you
don't specify
[-d
timestamp
]
,
pathname
's timestamp is set to the
currenttime;otherwise,itissettothespecified
timestamp
value,which
has the format
yyyy
-
MM
-
dd HH
:
mm
:
ss
z
(
2010-08-13 02:37:45
UTC
and
2006-04-22 12:35:45 EST
are examples). Hints: The
java.util.Date
class(whichIformallyintroduceinAppendixC)has
a
getTime()
method whose return value can be passed to
File
's
setLastModified()
method.Also,you'llfind
Date date = new
