Re: how can i set center

From:

"ashwinijain" <ashwinijain@THRWHITE.remove-dii-this>

Newsgroups:

comp.lang.java.gui

Date:

Wed, 27 Apr 2011 15:29:18 GMT

Message-ID:

<1169302743.382827.7750@s34g2000cwa.googlegroups.com>

To: comp.lang.java.gui

Michael Rauscher wrote:

ashwinijain schrieb:

Michael Rauscher wrote:

ashwinijain schrieb:

hi, i am using a jtable for making some calculation and i want to set
the center alignment of last column.
But i really dont know how to set it?
Please help me out...
I used following method but it works for all columns..
((JLabel)tab1.getDefaultRenderer(String.class)).setHorizontalAlignment
(JLabel.CENTER);

And i want to set alignment for last column only.

There are different methods to do what you want to be done :)

The most simple should be to override JTable#getCellRenderer, e. g.

JTable myTable = new JTable(myModel) {
     public TableCellRenderer getCellRenderer( int row, int col ) {
         TableCellRenderer renderer = super.getCellRenderer(row,col);
         if ( col == dataModel.getColumnCount() - 1 )
             renderer.setHorizontalAlignment( SwingConstants.CENTER );
         return renderer;
     }
};

Bye
Michael

Thanks but its giving me error that "setHorizontalAlignment(int) is
undefined for renderer.

Sorry, I forgot to cast. Change the above to:

       TableCellRenderer renderer = super.getCellRenderer(row,col);

       int alignment = (col == dataModel.getColumnCount() - 1) ?
               SwingConstants.CENTER : SwingConstants.LEFT;

       ((JLabel)renderer).setHorizontalAlignment( alignment );
       return renderer;

Should work (but not tested).

Bye
Michael

Thank you very much, its working.
But you know now what has happened. i am already applying one cell
renderer to my table so ur code giving error "class cast exception"

class MyCellRenderer extends JTextArea implements TableCellRenderer {
public MyCellRenderer() {
    setLineWrap(true);
    setWrapStyleWord(true);
    setPreferredSize(new Dimension(465,340));
    setAlignmentY(RIGHT_ALIGNMENT );
}

public Component getTableCellRendererComponent(JTable table, Object
        value, boolean isSelected, boolean hasFocus, int row, int
column) {
    setText((String)value);
    setSize(table.getColumnModel().getColumn(column).getWidth(),
            getPreferredSize().height);
    if (table.getRowHeight(row) != getPreferredSize().height) {
            table.setRowHeight(row, getPreferredSize().height);
    }

    return this;
}
}

can u solve this problem?

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