Solved

JMenu and invoking close the window

Posted on 2003-11-26
11
609 Views
Last Modified: 2010-03-31
I created JFrame in the applet, but JMenu is on applet.(It supposed to be on JFrame.)
The following is my code segment.
------------------------------------------
public class LibraryApplet extends JApplet implements ActionListener{
      …
      …
  public void init() {
  myFrame = new JFrame();
  contentPane = myFrame.getContentPane();
  layout = new GridBagLayout();
  contentPane.setLayout(layout);
  constraints = new GridBagConstraints();
       …
       …
   JMenu fileMenu = new JMenu("File");
   JMenuItem exitItem = new JMenuItem("Exit");
   fileMenu.add(exitItem);
    JMenuBar bar = new JMenuBar();
    setJMenuBar(bar);
    bar.add(fileMenu);

    myFrame.pack() ;
  }
--------------------------------------
Another question is that top-level window(JFrame) has a File menu containing a menu item "Exit". When "Exit" is invoked the application will close the window (the user sees an empty applet page with just the title and header)

 How do I implement the above "Exit" behavior?

Thank you for help
0
Comment
Question by:dkim18
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 5
  • 4
  • 2
11 Comments
 
LVL 9

Assisted Solution

by:yongsing
yongsing earned 50 total points
ID: 9830114
Change

setJMenuBar(bar);

to

myFrame.setJMenuBar(bar);
0
 
LVL 9

Expert Comment

by:yongsing
ID: 9830116
>> How do I implement the above "Exit" behavior?

How do you want the "Exit" behaviour to be like?
0
 

Author Comment

by:dkim18
ID: 9830138
When "Exit" is invoked the application will close the window (the user sees an empty applet page with just the title and header)
0
Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 92

Expert Comment

by:objects
ID: 9830154
myFrame.hide();
0
 
LVL 9

Expert Comment

by:yongsing
ID: 9830163
Add this to your code and see if it helps:

myFrame.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
0
 
LVL 9

Expert Comment

by:yongsing
ID: 9830170
Ignore my last comment. objects is right. You need to call JFrame.hide(). You also need to add action listener to your exit menu item:

exitItem.addActionListener(
  new ActionListener() {
    public void actionPerformed(ActionEvent e) {
      ((JFrame)e.getSource()).hide();
    }
  }
);
0
 
LVL 92

Expert Comment

by:objects
ID: 9830171
The window shouldn't be disposed cause the next time the applet is loaded the same window is used.
0
 
LVL 92

Accepted Solution

by:
objects earned 200 total points
ID: 9830176
shouldn't that be:

exitItem.addActionListener(
  new ActionListener() {
    public void actionPerformed(ActionEvent e) {
      myFrame.hide();
    }
  }
);
0
 
LVL 9

Expert Comment

by:yongsing
ID: 9830198
Oh ya, that was a mistake. :-)
0
 

Author Comment

by:dkim18
ID: 9832697
objects
superb!
0
 
LVL 92

Expert Comment

by:objects
ID: 9833720
0

Featured Post

Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
HashTable highest marks enumeration alternative 9 47
hibernate insert example 13 38
dao vs facade design patterns 2 31
Coding for the first time 9 62
An old method to applying the Singleton pattern in your Java code is to check if a static instance, defined in the same class that needs to be instantiated once and only once, is null and then create a new instance; otherwise, the pre-existing insta…
INTRODUCTION Working with files is a moderately common task in Java.  For most projects hard coding the file names, using parameters in configuration files, or using command-line arguments is sufficient.   However, when your application has vi…
Video by: Michael
Viewers learn about how to reduce the potential repetitiveness of coding in main by developing methods to perform specific tasks for their program. Additionally, objects are introduced for the purpose of learning how to call methods in Java. Define …
This tutorial explains how to use the VisualVM tool for the Java platform application. This video goes into detail on the Threads, Sampler, and Profiler tabs.

763 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question