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Groovy example source code file (MyTableModel.java)

This example Groovy source code file (MyTableModel.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

andrews, boolean, boolean, integer, integer, jtable, log, logging, mytablemodel, name, object, object, snowboarding, speed, string, string, table, walrath

The Groovy MyTableModel.java source code

package groovy.swing;

import java.util.logging.Level;
import java.util.logging.Logger;

import javax.swing.table.AbstractTableModel;

/** 
 * A sample table model
 *
 * @author <a href="mailto:james@coredevelopers.net">James Strachan
 * @version $Revision: 11944 $
 */
public class MyTableModel extends AbstractTableModel {

    private static final Logger log = Logger.getLogger(MyTableModel.class.getName());

    public MyTableModel() {
    }

    final String[] columnNames = { "First Name", "Last Name", "Sport", "# of Years", "Vegetarian" };
    final Object[][] data = { { "Mary", "Campione", "Snowboarding", Integer.valueOf(5), new Boolean(false)}, {
            "Alison", "Huml", "Rowing", Integer.valueOf(3), new Boolean(true)
            }, {
            "Kathy", "Walrath", "Chasing toddlers", Integer.valueOf(2), new Boolean(false)
            }, {
            "Mark", "Andrews", "Speed reading", Integer.valueOf(20), new Boolean(true)
            }, {
            "Angela", "Lih", "Teaching high school", Integer.valueOf(4), new Boolean(false)
            }
    };

    public int getColumnCount() {
        return columnNames.length;
    }

    public int getRowCount() {
        return data.length;
    }

    public String getColumnName(int col) {
        return columnNames[col];
    }

    public Object getValueAt(int row, int col) {
        return data[row][col];
    }

    /*
     * JTable uses this method to determine the default renderer/
     * editor for each cell.  If we didn't implement this method,
     * then the last column would contain text ("true"/"false"),
     * rather than a check box.
     */
    public Class getColumnClass(int c) {
        return getValueAt(0, c).getClass();
    }

    /*
     * Don't need to implement this method unless your table's
     * editable.
     */
    public boolean isCellEditable(int row, int col) {
        //Note that the data/cell address is constant,
        //no matter where the cell appears onscreen.
        if (col < 2) {
            return false;
        }
        else {
            return true;
        }
    }

    /*
     * Don't need to implement this method unless your table's
     * data can change.
     */
    public void setValueAt(Object value, int row, int col) {
        if (log.isLoggable(Level.FINE)) {
            log.fine(
                "Setting value at " + row + "," + col + " to " + value + " (an instance of " + value.getClass() + ")");
        }

        if (data[0][col] instanceof Integer && !(value instanceof Integer)) {
            //With JFC/Swing 1.1 and JDK 1.2, we need to create    
            //an Integer from the value; otherwise, the column     
            //switches to contain Strings.  Starting with v 1.3,   
            //the table automatically converts value to an Integer,
            //so you only need the code in the 'else' part of this 
            //'if' block.                                          
            //XXX: See TableEditDemo.java for a better solution!!!
            try {
                data[row][col] = Integer.valueOf(value.toString());
                fireTableCellUpdated(row, col);
            }
            catch (NumberFormatException e) {
                log.log(Level.SEVERE, "The \"" + getColumnName(col) + "\" column accepts only integer values.");
            }
        }
        else {
            data[row][col] = value;
            fireTableCellUpdated(row, col);
        }
    }

}

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