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Re: Copying JPanel compon

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  To: comp.lang.java.gui
On Aug 14, 11:31 am, Thomas Fritsch <i.dont.like.s...@invalid.com>
wrote:
> marcussilf...@gmail.com schrieb:
>
> > I want to copy the contents of a jPanel to another JPanel, then I want
> > to empty the original JPanel.
> > I unsuccessfully tried the following:
>
> > jPanel1 = new JPanel();
> > jPanel1.setBounds(371, 112, 364, 28);
> > jPanel1.add(new JLabel("a"));
> > jPanel1.add(new JLabel("b"));
> > jPanel1.add(new JLabel("c"));
>
> > JPanel jp = new JPanel();
>
> > int numComponents = jPanel1.getComponentCount();
> > System.out.println("Number of components in jPanel1 is " +
> > numComponents);
>
> > for (int i=0; i<numComponents; i++)
> > {
> >     jp.add(jPanel1.getComponent(i));
>
>
> Try something like this:
>    int numComponents = jPanel1.getComponentCount();
>    for (int i = 0; i < numComponents; i++)
>    {
>      jp.add(jPanel1.getComponent(0));
>      //jPanel1.remove(...) isn't needed, because child is already removed
>    }
> or may be like this:
>    for (int i = jPanel1.getNumComponents() - 1; i >= 0; i--)
>    {
>      jp.add(jPanel1.getComponent(i));
>      //jPanel1.remove(...) isn't needed, because child is already removed
>    }
>
> --
> Thomas

For loops that change the quantity of things, I like to use a while
loop eg.

while (jPanel1.getComponentCount() > 0) {
  jp.add(jPanel1.getComponent(0);
}

or I use this a lot for removing rows from a JTable

DefaultTableModel model = (DefaultTableModel)tblMyTable.getModel();
while (model.getRowCount() > 0) {
  model.removeRow(0);
}

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Thread

Copying JPanel components "marcussilfver" <marcussilfver@THRWHITE.remove-dii-this> - 2011-04-27 15:37 +0000
  Re: Copying JPanel compon "Thomas Fritsch" <thomas.fritsch@THRWHITE.remove-dii-this> - 2011-04-27 15:37 +0000
    Re: Copying JPanel compon "bcr666" <bcr666@THRWHITE.remove-dii-this> - 2011-04-27 15:37 +0000
  Re: Copying JPanel compon "Ville Oikarinen" <ville.oikarinen@THRWHITE.remove-dii-this> - 2011-04-27 15:37 +0000
    Re: Copying JPanel compon "Larry Barowski" <larry.barowski@THRWHITE.remove-dii-this> - 2011-04-27 15:38 +0000

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