Learning Java
Chapter 14: Using Swing Components
The following application includes all the examples we've
covered:
import javax.swing.*;
public class ExerciseOptions {
public static void main(String[] args) {
JFrame f = new JFrame("ExerciseOptions v1.0");
f.setSize(200, 200);
f.setLocation(200, 200);
f.setVisible(true);
JOptionPane.showMessageDialog(f, "You have mail.");
JOptionPane.showMessageDialog(f,
"You are low on memory.",
"Apocalyptic message",
JOptionPane.WARNING_MESSAGE);
int result = JOptionPane.showConfirmDialog(null,
"Do you want to remove Windows now?");
switch (result) {
case JOptionPane.YES_OPTION:
System.out.println("Yes"); break;
case JOptionPane.NO_OPTION:
System.out.println("No"); break;
case JOptionPane.CANCEL_OPTION:
System.out.println("Cancel"); break;
case JOptionPane.CLOSED_OPTION:
System.out.println("Closed"); break;
}
String name = JOptionPane.showInputDialog(null,
"Please enter your name.");
System.out.println(name);
JTextField userField = new JTextField( );
JPasswordField passField = new JPasswordField( );
String message = "Please enter your user name and password.";
result = JOptionPane.showOptionDialog(f,
new Object[] { message, userField, passField },
"Login", JOptionPane.OK_CANCEL_OPTION,
JOptionPane.QUESTION_MESSAGE,
null, null, null);
if (result == JOptionPane.OK_OPTION)
System.out.println(userField.getText( ) +
" " + new String(passField.getPassword( )));
System.exit(0);
}
}
[Lines 10 and 11 above are one line as are lines 12 and 13. They have
been split for formatting purposes.]
New on the Java Boutique:
New Review:
Time Management Made Easy with the Quartz Enterprise Job Scheduler
Why not just use the Java timer API? This open source scheduling
API boasts simplicity, ease-of-integration, a well-rounded feature
set, and it's free!
New Applet:
Reverse Complement
Reverse Complement is a simple applet that converts DNA or RNA
sequences into three useful formats.
Elsewhere on internet.com:
WebDeveloper Java
Lots of Java information on webdeveloper.com
WDVL Java
Thorough Java resource at the Web Developer's Virtual Library.
ScriptSearch Java
Hundreds of free Java code files to download.
jGuru: Your View of the Java Universe
Customizable portal with online training, FAQs, regular news updates, and tutorials.
