?
Solved

load a frame once

Posted on 2003-12-02
5
Medium Priority
?
191 Views
Last Modified: 2010-07-27
Im using the code below to load a frame every time a user opens the class file concerned with the following code. But I want the frame only to be loaded once, just when the user loads the class for the first time, and the for the class to be dynamically updated. The if statement im tyring to use throws an error when a second user trys to concurrently load the class file. Any help would be great, thanks.

public F(int NO){
            super("F");
            if(NO == 0){//this flag causes an error
            dis = new TextArea(20 , 10);
                  add("Center" , display);
          resize(300 , 150);
          show();
            }      
0
Comment
Question by:Ronayne
[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
  • 3
5 Comments
 
LVL 92

Expert Comment

by:objects
ID: 9863631
you need to change the code that actually create F.
Keep an instance to F, and reuse it.
0
 

Author Comment

by:Ronayne
ID: 9863644
Im creating different instances of f for different parameters passed in variable NO
0
 
LVL 92

Accepted Solution

by:
objects earned 200 total points
ID: 9863663
would a Hashtable on frames help you:

private Hashtable frames = new Hashtable();


public F getFrame(int no)
{
   Integer _no = new Ineteger(no);
   F result = (F) frames.get(_no);
   if (result==null)
   {
      result = new F(no);
      frames.put(_no, result);
   }
   return result;
}
0
 
LVL 3

Expert Comment

by:InNoCenT_Ch1ld
ID: 9863961
does the question mean the instance of the frame can be open one at a time?

i try this using JInternalFrame.

set
-doDefaultCloseOperation(WindowConstants.HIDE_ON_CLOSE); for the frame
-when you want to frame to be open, use setVisible(true);

i successfully restrict the frame to be loaded one at a time.

Feel free to discard this comment if this is not what you asking ;)

-Child that so pissed off!-
0
 
LVL 92

Expert Comment

by:objects
ID: 9959144
0

Featured Post

Get real performance insights from real users

Key features:
- Total Pages Views and Load times
- Top Pages Viewed and Load Times
- Real Time Site Page Build Performance
- Users’ Browser and Platform Performance
- Geographic User Breakdown
- And more

Question has a verified solution.

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

This was posted to the Netbeans forum a Feb, 2010 and I also sent it to Verisign. Who didn't help much in my struggles to get my application signed. ------------------------- Start The idea here is to target your cell phones with the correct…
Go is an acronym of golang, is a programming language developed Google in 2007. Go is a new language that is mostly in the C family, with significant input from Pascal/Modula/Oberon family. Hence Go arisen as low-level language with fast compilation…
Viewers learn about the scanner class in this video and are introduced to receiving user input for their programs. Additionally, objects, conditional statements, and loops are used to help reinforce the concepts. Introduce Scanner class: Importing…
Viewers learn how to read error messages and identify possible mistakes that could cause hours of frustration. Coding is as much about debugging your code as it is about writing it. Define Error Message: Line Numbers: Type of Error: Break Down…
Suggested Courses
Course of the Month12 days, 8 hours left to enroll

777 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