JButtons and JTables

**dn baas** · 02-19-2013, 05:19 PM

Hi,

I decided to add JButtons in a JTable (it's actually a DefaultTableModel). but instead of a normal button I see "javax.swing.JButton[,0,0,0x0,invalid,alignmentX=0.0,alignmentY=0.5,bor der=javax.swing.plaf.BorderUIResource$CompoundBord erUIResource@371d1794,flags=296,maximumSize=,minim umSize=,preferredSize=,defaultIcon=,disabledIcon=, disabledSelectedIcon=,margin=javax.swing.plaf.Inse tsUIResource[top=2,left=14,bottom=2,right=14],paintBorder=true,paintFocus=true,pressedIcon=,rol loverEnabled=true,rolloverIcon=,rolloverSelectedIc on=,selectedIcon=,text=verwijder,defaultCapable=tr ue]". Does someone know a solution? I use this code:

Java Code:

package View;

import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.RowSorter;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableModel;
import javax.swing.table.TableRowSorter;

public class PanelView extends JPanel{
	private static final long serialVersionUID = 1L;
	protected JTable table;
	protected JScrollPane pane;
	DefaultTableModel model;
	
	public PanelView(){
	}
	
	public void makeTabel()
	{
		System.out.println("tabel maken");
		try
		{
			for(Object[] o: file.getList())
			{
				addRowIntoTable(o);
			}
		}
		catch(NullPointerException e)
		{
			
		}
	}
//don't mind this, it only makes a table and that works

	/*public void createTable(String columns[], Object rows[][]){
			model =
	               new DefaultTableModel(rows, columns) {
				public Class getColumnClass(int column) {
	               Class returnValue;
	               if ((column >= 0) && (column < getColumnCount())) {
	                 returnValue = getValueAt(0, column).getClass();
	               } else {
	                 returnValue = Object.class;
	               }
	               return returnValue;
	             }
	           };
	           JTable table = new JTable(model);
	           RowSorter<TableModel> sorter = new TableRowSorter<TableModel>(model);
	           table.setRowSorter(sorter);
	           pane = new JScrollPane(table);
	}*/
	
	public void addRowIntoTable(Object row[])
	{
		model.insertRow(model.getRowCount(), row);
	}
}

Java Code:

package View;

import javax.swing.JButton;


public class PanelBand extends PanelView
{
	private static final long serialVersionUID = 1L;
	
	public PanelBand(String map){
		String columns[] = {"test","test","test","test"};
		JButton button = new JButton("verwijder");
		Object row[] = {"test","test","test",button};
		Object rows[][] = {};
		createTable(columns, rows);
                makeTabel();
		add(pane);
	}
	
}

This isn't all of the code: some date is loaded from a file and put into the table.

Thanks!

**KevinWorkman** · 02-19-2013, 05:49 PM

You can't just add a JButton to a JTable. What you're seeing is what happens when the JButton's toString() method is called, because the JTable is trying to render the JButton as a JTable.

Instead, you'll want to use a custom renderer that draws a JButton. Keep in mind that these JButtons won't accept click events.

You might also want to rethink our logic here. Do you really want a JTable of JButtons? Or do you want a grid of JButtons (if so use a layout manager)? Or do you want a JTable that supports mouse input (if so use a MouseListener)?

**dn baas** · 02-19-2013, 06:53 PM

Originally Posted by KevinWorkman

You can't just add a JButton to a JTable. What you're seeing is what happens when the JButton's toString() method is called, because the JTable is trying to render the JButton as a JTable.

Instead, you'll want to use a custom renderer that draws a JButton. Keep in mind that these JButtons won't accept click events.

You might also want to rethink our logic here. Do you really want a JTable of JButtons? Or do you want a grid of JButtons (if so use a layout manager)? Or do you want a JTable that supports mouse input (if so use a MouseListener)?

Well, I want to make a JTable with text (Strings) and JButtons. Those buttons need to remove a row when you click on it. Alternatives are also welcome. :P