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How to create a link to a JPanel from a JFrame??

Posted on 2004-04-21
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619 Views
Last Modified: 2013-11-23
Hi
anyone knowthe coding on how to create a link to a JPanel from a JFrame?


will apprecaite if anyone can help mi..Thanks
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Question by:aaabbaaa
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21 Comments
 

Author Comment

by:aaabbaaa
ID: 10881860
HELP..Urgent!!!
0
 
LVL 86

Accepted Solution

by:
CEHJ earned 125 total points
ID: 10881891
What do you mean by a 'link'
0
 

Author Comment

by:aaabbaaa
ID: 10881952
I created a Jbutton called "Next"
then I want to link to List which has extends  JPanel in another class file like
 
public class List extends JPanel {
...
}

then in my actionperform methods

f(event.getSource() == voteButton)
      {
            List vote = new  List();
            List.setSize(1025,768);
            List.setLocation(FRAME_X_ORIGIN, FRAME_Y_ORIGIN);
            List.setVisible(true);
            setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
            dispose();
                        
      }

but it can't works there an error message saying:
C:\Documents and Settings\Desktop\Java\Character.java:298: cannot resolve symbol
symbol  : constructor List ()
location: class List
                  VoteDialog vote = new  VoteDialog();  //VoteDialog();    
                                          ^
1 error

Process completed.
0
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LVL 86

Expert Comment

by:CEHJ
ID: 10882011
Firstly I would not use the name 'List'. There is already a name conflict in Java caused by carelessness by Sun - you don't want to make it worse. You mean you want to click on a button and show a list of votes in another window?
0
 

Author Comment

by:aaabbaaa
ID: 10882035
I want to click on a button and show the List.java..that all..
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 10882117
You need to have

public MyList() {
    super();
}

in MyList (or whatever name you change it to from 'List')

In the following, you need to change 'List' to 'vote'
>>
          List.setSize(1025,768);
          List.setLocation(FRAME_X_ORIGIN, FRAME_Y_ORIGIN);
          List.setVisible(true);
>>

0
 

Author Comment

by:aaabbaaa
ID: 10882262
i tried but it show this errors..

C:\Documents and Settings\JL\Desktop\Java\Character.java:307: cannot resolve symbol
symbol  : constructor VoteDialog ()
location: class VoteDialog
                   VoteDialog vote =new VoteDialog();    
                                          ^
C:\Documents and Settings\JL\Desktop\Java\Character.java:308: cannot resolve symbol
symbol  : variable Vote
location: class Character
                  Vote.setSize(1025,768);
                        ^
C:\Documents and Settings\JL\Desktop\Java\Character.java:309: cannot resolve symbol
symbol  : variable Vote
location: class Character
                  Vote.setLocation(FRAME_X_ORIGIN, FRAME_Y_ORIGIN);
                        ^
C:\Documents and Settings\JL\Desktop\Java\Character.java:310: cannot resolve symbol
symbol  : variable Vote
location: class Character
                  Vote.setVisible(true);
                        ^
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 10882371
You also need to define that constructor in VoteDialog in the same way.

I said to change 'List' to 'vote'. You changed it to 'Vote'
0
 

Author Comment

by:aaabbaaa
ID: 10882458
ok..I had changed the constructor and the "Vote" to vote but it is still not working..
My coding:
      if(event.getSource() == voteButton)
            {
                  VoteDialog vote =new VoteDialog();    
                  vote.setSize(1025,768);
                  vote.setLocation(FRAME_X_ORIGIN, FRAME_Y_ORIGIN);
                  vote.setVisible(true);
                  setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
                  dispose();
                        
            }

this error is shown:
C:\Documents and Settings\JL\Desktop\Java\Character.java:301: cannot resolve symbol
symbol  : constructor VoteDialog ()
location: class VoteDialog
                  VoteDialog vote =new VoteDialog();    
                                         ^
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 10882609
>>ok..I had changed the constructor

You can't have done, as it's saying that there is no such constructor
0
 

Author Comment

by:aaabbaaa
ID: 10882712
The constructor for VoteDialog.class :
 public VoteDialog(JFrame frame) {
          super();
          
        this.frame = frame;
        JLabel title;    
}

The constructor for Character.class :
      public Character(){
            super();
            Container contentPane;
}

What I want is to be able to link from my Character.class to VoteDialog.class
            
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 10882810
Yes - as i said you have no constructor VoteDialog().

You also should not have a class called Character as that too could get you into naming conflicts
0
 

Author Comment

by:aaabbaaa
ID: 10882882
//Yes - as i said you have no constructor VoteDialog().-->so u mean I am right in my constructor now?

I created a button in Character.class and want to use it to link to VoteDialog.class so I need my Character.class..

this error is shown:
C:\Documents and Settings\JL\Desktop\Java\Character.java:301: cannot resolve symbol
symbol  : constructor VoteDialog ()
location: class VoteDialog
               VoteDialog vote =new VoteDialog();    
                                         ^
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 10882904
I've already told you the reason for that error more than once before
0
 

Author Comment

by:aaabbaaa
ID: 10883005
You said I have no constructor on my VoteDialog but
isn't this a constructor from VoteDialog.class?:

Public VoteDialog ()  {
...
}
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 10883025
Well

public VoteDialog ()  {
...
}

would be one, but i saw no sign of it in the code you posted and the error messages indicate its absence
0
 

Author Comment

by:aaabbaaa
ID: 10883083
if(event.getSource() == voteButton)
            {
                  VoteDialog vote =new VoteDialog();    
                  vote.setSize(1025,768);
                  vote.setLocation(FRAME_X_ORIGIN, FRAME_Y_ORIGIN);
                  vote.setVisible(true);
                  setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
                  dispose();
                        
            }

I am typing this codes out in Character.class under actionPerform because I wanted to link to VoteDialog.class through the "voteButton".I had already added super(); into both the .class constructors but it still can't work??

how come the error message indicated it is absence when i had already had right in the top??
Please advise.Thanks
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 10883135
>>VoteDialog vote =new VoteDialog();    

That only shows an empty constructor being called, it doesn't show it's present
0
 

Author Comment

by:aaabbaaa
ID: 10883166
But I had already coded it y does it not present??

What should I do now?
0
 
LVL 86

Expert Comment

by:CEHJ
ID: 10883189
Please show, in context, where it appears in your code
0
 

Author Comment

by:aaabbaaa
ID: 10883230
This is where my constructor for VoteDialog shows:
public class VoteDialog extends JPanel {
     JButton voteButton;
    JLabel label;
    JFrame frame;
    String simpleDialogDesc = "The Polythenics";

       DataBase db = new DataBase();
    Connection connection = db.getConnection();
   
      private boolean DEBUG = true;

    public VoteDialog(JFrame frame) {
          super();
          
        this.frame = frame;
        JLabel title;    
       
 This is where the constructor for Character.class shows:
      public Character(){
            super();
            Container contentPane;
            
            
            // set frame properties
0

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