Java SE (Java Platform, Standard Edition)

I am trying to delete a row from a JTable whenever the button on the last column is pressed. I know to do this, I can use the removeRow(int) method of the tableModel. But the odd thing is when I try to get a handle to the TableModel from the JTable to use that function, i.e. table.getModel().removeRow(int) it doesn't work. But if I explicitly pass in the tableModel into my class it does work. Here's the code below:

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.table.*;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.UIManager;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableCellEditor;
import javax.swing.AbstractCellEditor;
import javax.swing.table.DefaultTableModel;
 
public class tester4 extends JFrame
{
	protected final int BUTTON_COL = 2;
	
	private TableCellRenderer defaultRenderer;
	private TableCellEditor defaultEditor;
	private JTable workingTable;
	private String[] transactionCols = {"Qty", "Product", "Cancel"};
	private Object[][] data = {{5, "prod1", "Cancel"},
			{6, "prod2", "Cancel"},
			{7, "prod3", "Cancel"}};
    public tester4()
    {
		workingTable = new JTable(tableModel);
		workingTable.setName("Working Table");
		defaultRenderer = workingTable.getDefaultRenderer(JButton.class);
		defaultEditor = workingTable.getDefaultEditor(Object.class);
		
		StatusTableRenderer testRenderer = new StatusTableRenderer(defaultRenderer, defaultEditor, workingTable, tableModel);
	
		workingTable.setDefaultRenderer(Object.class, testRenderer);
		workingTable.setDefaultEditor(Object.class, testRenderer);
        
        JScrollPane scrollPane = new JScrollPane( workingTable );
        getContentPane().add( scrollPane );
 
    }

	private DefaultTableModel tableModel = new DefaultTableModel(data, transactionCols){
		// Only allow button column to be editable, if there is an actual
		// button in that row		
		public boolean isCellEditable(int row, int col){
			return (col == BUTTON_COL && data[row][col] != "") ? true : false; 
		}
		
		// Overriden getColumnClass method that will return the object
		// class type of the first instance of the data type otherwise
		// returns the Object.class
		public Class getColumnClass(int column){
            for (int row = 0; row < getRowCount(); row++){
                Object o = getValueAt(row, column);

                if (o != null){ return o.getClass(); }
            }

            return Object.class;
        }
	};
	
    public static void main(String[] args)
    {
        tester4 frame = new tester4();
        frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
        frame.pack();
        frame.setVisible(true);
    }
    
    public class StatusTableRenderer extends AbstractCellEditor 
    								implements TableCellRenderer,
    											TableCellEditor,
    											ActionListener{ 
    	private TableCellRenderer defaultRenderer;
    	private TableCellEditor defaultEditor;
    	private JButton cancelButton;
    	private JButton editButton;
    	private String text;
    	private int buttonColumn;
    	private int selectedRow;
    	private JTable table;
    	private DefaultTableModel tableModel;

    	public StatusTableRenderer(TableCellRenderer renderer, 
    							TableCellEditor editor,
    							JTable table,
    							DefaultTableModel tableModel){
    		defaultRenderer = renderer;
    		defaultEditor = editor;
    		this.table = table;
    		this.tableModel = tableModel;
    		buttonColumn = table.getColumnCount() - 1;
    		
            cancelButton = new JButton();
            
            editButton = new JButton();
            editButton.setFocusPainted(true);
            editButton.addActionListener(this);
    	}
    	
    	public StatusTableRenderer(TableCellRenderer renderer,
    								TableCellEditor editor,
    								JTable table,
    								DefaultTableModel tableModel,
    								int _buttonColumn){
    		this(renderer, editor, table, tableModel);
    		buttonColumn = _buttonColumn;
    	}
    		
    	public Component getTableCellRendererComponent(JTable table, Object value,
    			boolean isSelected, boolean hasFocus, int row, int column) {
    		
    		if (column == buttonColumn){
    			if (hasFocus){
    				cancelButton.setForeground(table.getForeground());
    				cancelButton.setBackground(UIManager.getColor("Button.background"));
    			}
    			else if (isSelected){
    				cancelButton.setForeground(table.getSelectionForeground());
    				cancelButton.setBackground(table.getSelectionBackground());
    			}
    			else{
    				cancelButton.setForeground(table.getForeground());
    				cancelButton.setBackground(UIManager.getColor("Button.background"));
    			}

    			cancelButton.setText( (value == null) ? "" : value.toString() );
            
    			return cancelButton;
    		}
            return defaultRenderer.getTableCellRendererComponent(
    				table, value, isSelected, hasFocus, row, column);
    	}
    	
    	public Component getTableCellEditorComponent(JTable table, Object value,
    			boolean isSelected, int row, int column){
    		
    		if (column == buttonColumn){
    			text = ((value == null) ? "": value.toString());
    			editButton.setText(text);
    			selectedRow = row;
    				
    			return editButton;
    		}
    		
    		return defaultEditor.getTableCellEditorComponent(
    				table, value, isSelected, row, column);
    	}
    	
        public Object getCellEditorValue()
        {
            return text;
        }
    	
        public void actionPerformed(ActionEvent e)
        {
            fireEditingStopped();
            
            // This works
            tableModel.removeRow(selectedRow);
            
           // This does not work
          //  table.getModel().removeRow(selectedRow);
            
        }
        
    }
}

Take a look at the actionPerfformed method. One way of doing it works, one doesn't. Just trying to understand why me getting a handle to the tableModel through the table doesn't work.

Message was edited by:
deadseasquirrels