Java Reference
In-Depth Information
The source code is shown in
Example 12-10
.
Example 12-10. PrintServiceDemo.java
/**
* Show the latest incarnation of printing, PrintService, from a GUI;
* the GUI consists only of a "Print" button, and the filename is hardcoded,
* but it's meant to be a minimal demo...
*/
public
public class
class
PrintServiceDemo
PrintServiceDemo
extends
extends
JFrame
{
private
private static
static final
final
long
long
serialVersionUID
=
923572304627926023L
;
private
private static
static final
final
String INPUT_FILE_NAME
=
"/demo.txt"
;
/** main program: instantiate and show.
* @throws IOException */
public
public static
static
void
void
main
(
String
[]
av
)
throws
throws
Exception
{
SwingUtilities
.
invokeLater
(
new
new
Runnable
() {
public
public
void
void
run
() {
try
try
{
new
new
PrintServiceDemo
(
"Print Demo"
).
setVisible
(
true
true
);
}
catch
catch
(
Exception e
) {
e
.
printStackTrace
();
}
}
});
}
/** Constructor for GUI display with pushbutton to print */
PrintServiceDemo
(
String title
) {
super
super
(
title
);
System
.
out
.
println
(
"PrintServiceDemo.PrintServiceDemo()"
);
setDefaultCloseOperation
(
EXIT_ON_CLOSE
);
setLayout
(
new
new
FlowLayout
());
JButton b
;
add
(
b
=
new
new
JButton
(
"Print"
));
b
.
addActionListener
(
new
new
ActionListener
() {
public
public
void
void
actionPerformed
(
ActionEvent e
) {
System
.
out
.
println
(
"PrintServiceDemo.PrintServiceDemo...actionPerformed()"
);
try
try
{
print
(
INPUT_FILE_NAME
);
}
catch
catch
(
Exception e1
) {
JOptionPane
.
showMessageDialog
(
PrintServiceDemo
.
this
,
"Error: "
+
e1
,
"Error"
,
