Java Reference
In-Depth Information
// to the ExtentionFilter in demo/jfc accompanying the J2SE SDK.
JFileFilter filter
=
new
new
JFileFilter
();
filter
.
addType
(
"java"
);
filter
.
addType
(
"class"
);
filter
.
addType
(
"jar"
);
filter
.
setDescription
(
"Java-related files"
);
chooser
.
addChoosableFileFilter
(
filter
);
JButton b
=
new
new
JButton
(
"Choose file..."
);
add
(
b
);
b
.
addActionListener
(
new
new
ActionListener
() {
public
public
void
void
actionPerformed
(
ActionEvent e
) {
int
int
returnVal
=
chooser
.
showOpenDialog
(
frame
);
iif
(
returnVal
==
JFileChooser
.
APPROVE_OPTION
) {
File file
=
chooser
.
getSelectedFile
();
System
.
out
.
println
(
"You chose a "
+
(
file
.
isFile
() ?
"file"
:
"directory"
) +
" named: "
+
file
.
getPath
());
}
else
else
{
System
.
out
.
println
(
"You did not choose a filesystem object."
);
}
}
});
}
public
public static
void
main
(
String
[]
args
) {
JFrame f
=
new
static
void
new
JFrame
(
"JFileChooser Demo"
);
f
.
getContentPane
().
add
(
new
new
JFileChooserDemo
(
f
));
f
.
pack
();
f
.
setDefaultCloseOperation
(
JFrame
.
EXIT_ON_CLOSE
);
f
.
setVisible
(
true
true
);
}
}
In this example, I set up a
FileFilter
for Java files. Note that
FileFilter
exists both in
boolean accept(File)
and
String getDescription( )
. This is enough for a totally
fixed-function file filter: you could hardcode the list of extensions that should be accepted,
for example. The following class is similar in spirit to the
ExampleFileFilter
included in
the JDK demo directory:
