TableExample4.javaAPI DocExample6846Sat Sep 12 03:01:00 BST 1998None


public class TableExample4 extends Object
Another JTable example, showing how column attributes can be refined even when columns have been created automatically. Here we create some specialised renderers and editors as well as changing widths and colors for some of the columns in the SwingSet demo table.
1.6 01/27/98
Philip Milne

Fields Summary
Constructors Summary
public TableExample4()

        JFrame frame = new JFrame("Table");
        frame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {System.exit(0);}});

        // Take the dummy data from SwingSet.  
        final String[] names = {"First Name", "Last Name", "Favorite Color", 
                                "Favorite Number", "Vegetarian"}; 
        final Object[][] data = {
	    {"Mark", "Andrews", "Red", new Integer(2), new Boolean(true)},
	    {"Tom", "Ball", "Blue", new Integer(99), new Boolean(false)},
	    {"Alan", "Chung", "Green", new Integer(838), new Boolean(false)},
	    {"Jeff", "Dinkins", "Turquois", new Integer(8), new Boolean(true)},
	    {"Amy", "Fowler", "Yellow", new Integer(3), new Boolean(false)},
	    {"Brian", "Gerhold", "Green", new Integer(0), new Boolean(false)},
	    {"James", "Gosling", "Pink", new Integer(21), new Boolean(false)},
	    {"David", "Karlton", "Red", new Integer(1), new Boolean(false)},
	    {"Dave", "Kloba", "Yellow", new Integer(14), new Boolean(false)},
	    {"Peter", "Korn", "Purple", new Integer(12), new Boolean(false)},
	    {"Phil", "Milne", "Purple", new Integer(3), new Boolean(false)},
	    {"Dave", "Moore", "Green", new Integer(88), new Boolean(false)},
	    {"Hans", "Muller", "Maroon", new Integer(5), new Boolean(false)},
	    {"Rick", "Levenson", "Blue", new Integer(2), new Boolean(false)},
	    {"Tim", "Prinzing", "Blue", new Integer(22), new Boolean(false)},
	    {"Chester", "Rose", "Black", new Integer(0), new Boolean(false)},
	    {"Ray", "Ryan", "Gray", new Integer(77), new Boolean(false)},
	    {"Georges", "Saab", "Red", new Integer(4), new Boolean(false)},
	    {"Willie", "Walker", "Phthalo Blue", new Integer(4), new Boolean(false)},
	    {"Kathy", "Walrath", "Blue", new Integer(8), new Boolean(false)},
	    {"Arnaud", "Weber", "Green", new Integer(44), new Boolean(false)}

        // Create a model of the data.
        TableModel dataModel = new AbstractTableModel() {
            // These methods always need to be implemented. 
            public int getColumnCount() { return names.length; } 
            public int getRowCount() { return data.length;}
            public Object getValueAt(int row, int col) {return data[row][col];}

            // The default implementations of these methods in 
            // AbstractTableModel would work, but we can refine them. 
            public String getColumnName(int column) {return names[column];}
            public Class getColumnClass(int c) {return getValueAt(0, c).getClass();}
            public boolean isCellEditable(int row, int col) {return true;} 
            public void setValueAt(Object aValue, int row, int column) {
                System.out.println("Setting value to: " + aValue); 
                data[row][column] = aValue; 
        // Create the table
        JTable tableView = new JTable(dataModel);  

	// Create a combo box to show that you can use one in a table. 
	JComboBox comboBox = new JComboBox();

// .5       TableColumn colorColumn = tableView.getColumn(new Integer(3)); 
        TableColumn colorColumn = tableView.getColumn("Favorite Color"); 
        // Use the combo box as the editor in the "Favorite Color" column. 
        colorColumn.setCellEditor(new DefaultCellEditor(comboBox)); 
        // Set a pink background and tooltip for the Color column renderer.
        DefaultTableCellRenderer colorColumnRenderer = new DefaultTableCellRenderer(); 
        colorColumnRenderer.setToolTipText("Click for combo box"); 
        // Set a tooltip for the header of the colors column. 
	TableCellRenderer headerRenderer = colorColumn.getHeaderRenderer(); 
	if (headerRenderer instanceof DefaultTableCellRenderer)
	    ((DefaultTableCellRenderer)headerRenderer).setToolTipText("Hi Mom!");

	// Set the width of the "Vegetarian" column.
        TableColumn vegetarianColumn = tableView.getColumn("Vegetarian"); 

	// Show the values in the "Favorite Number" column in different colors.
        TableColumn numbersColumn = tableView.getColumn("Favorite Number"); 
        DefaultTableCellRenderer numberColumnRenderer = new DefaultTableCellRenderer() {
	    public void setValue(Object value) { 
	        int cellValue = (value instanceof Number) ? ((Number)value).intValue() : 0; 
	        setForeground((cellValue > 30) ? :; 
	        setText((value == null) ? "" : value.toString());

        // Finish setting up the table. 
        JScrollPane scrollpane = JTable.createScrollPaneForTable(tableView);
	scrollpane.setBorder(new BevelBorder(BevelBorder.LOWERED));
        scrollpane.setPreferredSize(new Dimension(700, 300)); 
Methods Summary
public static voidmain(java.lang.String[] args)

        new TableExample4();