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Could anyone help me: table staff?

3 replies on 1 page. Most recent reply: May 18, 2004 6:52 AM by Matthias Neumair

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Mike Lee

Posts: 3
Nickname: mike2004
Registered: May, 2004

Could anyone help me: table staff?

Posted: May 11, 2004 10:12 PM

I have difficulty adding a table to a frame.That frame has got buttons, textarea etc,and the frame is in a class which is inherited from Frame. Now my question is: How can I add a table to that frame to replace that textarea? Do I need to put all the code for creating that table in a separate class or put those code into the class in which that frame is ? I am using Jtable, but not sucessful. Thank you very much.

Matthias Neumair

Posts: 660
Nickname: neumi
Registered: Sep, 2003

Re: Could anyone help me: table staff?

Posted: May 12, 2004 12:37 AM

My tip: forget the Text-Area.

Use a JScrollPane , then assign the JTable to the Scrollpane using

jSPan_myPanel.setViewportView(jtab_myTable);

You can leave the code in your frame.

Mike Lee

Posts: 3
Nickname: mike2004
Registered: May, 2004

Re: Could anyone help me: table staff?

Posted: May 13, 2004 12:58 AM

Thank you very much for your reply.I would like to ask you some questions(Sorry, I am new to java).

Actually, my case is :
I've got a class :

class AllComponents extends Frame{
//this class creates all components in a frame: buttons, textarea , etc.
...

lower_panel.add(text_area, "Center");
//This statement is for creating a textarea with some text.If I comment out this statement, the textarea will disappear.
...

}

I've got another class which creates a table:

class SimpleTable extends JFrame
{
public SimpleTable()
{
table = new JTable(dataValues,columnNames);
...

}

public static void main(string args())
{
SimpleTable thisFrame = new SimpleTable();
thisFrame.setVisible(ture);
}

}

When I run SimpleTable as a standalone one,it produces a table for me. Now I want to add this table to the class AllComponents to replace that textarea, so when I run AllComponents, I will see a talbe instead of that textarea.

so my questions are: How can I insert the class SimpleTable to class ALLComponents?(I Know I need to get rid of main().)
Does it matter that SimpleTable extends JFrame but AllComponents extends Frame?
Can I comment out lower_panel.add(text_area, "Center"), add a new statement lower_panel.add(mytable, "Center")?

Will appreciate anyone's help.

Mike

Matthias Neumair

Posts: 660
Nickname: neumi
Registered: Sep, 2003

Re: Could anyone help me: table staff?

Posted: May 18, 2004 6:52 AM

Hope this helps.
You really have a lot of possibilities to do this, I hope this gives you an impression how many there are.

You could exchange
public ALLComponents (JComponent cmp) {
with
public ALLComponents (JTable tab) {
to avoid that anything else then a JTable can be put to lower_panel.


class ALLComponents extends JFrame {
    /** puts a text-area in the center of lower_panel
      */
    public ALLComponents () {
         this (new JTextArea());
         //put all the code in the other constructor, so you don't have to write it twice.
    }

    /** puts a component in the middle of center panel
      */
    public ALLComponents (JComponent cmp) {
        //lower_panel = ...
        lower_panel.add(cmp, "Center");
    }

    public static void main (String[]args) {
        ALLComponents allC = new ALLComponents();
        allC.show();
    }
}

//SimpleTable should not extend JFrame, since you don't want to use this class as frame, but instead you want to create a ALLComponents object

class SimpleTable {
    public static void main (String[] args) {
        ALLComponents allC = new ALLComponents(new JTable(dataValues, columnNames));
        allC.show();
    }
}

//this would be another nice way to do it:
class SimpleTable2 extends ALLComponents {
    public SimpleTable2 () {
        super(new JTable(dataValues, columnNames));
    }
    public static void main (String[] args) {
        SimpleTable2 sim = new SimpleTable2();
        sim.show();
    }
}

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