JTable

[new2this2002]

I have just installed the J2SDK 1.4.2 and when running TableExample4.java which is part of the download

its one of the example apps under
c:\j2sdk1.4.2\demo\jfc\TableExample\src\TableExample4.java

I was wondering if it was possible to make it so the table fits into size of the frame window correctly as when i run it and enlarge the frame to a greater size there is a large chunk of white space visible, how is it possible to make it so only the table is shown and not the empty space.

 

[new2this2002]

Here is the code that i having trouble with...

import javax.swing.*;
import javax.swing.table.*;
import javax.swing.border.*;

import java.awt.Dimension;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.Color;

public class TableExample4 {

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);
// Turn off auto-resizing so that we can set column sizes programmatically.
// In this mode, all columns will get their preferred widths, as set blow.
tableView.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);

// Create a combo box to show that you can use one in a table.
JComboBox comboBox = new JComboBox();
comboBox.addItem("Red"
comboBox.addItem("Orange"
comboBox.addItem("Yellow"
comboBox.addItem("Green"
comboBox.addItem("Blue"
comboBox.addItem("Indigo"
comboBox.addItem("Violet"

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.setBackground(Color.pink);
colorColumnRenderer.setToolTipText("Click for combo box"
colorColumn.setCellRenderer(colorColumnRenderer);

// 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"
vegetarianColumn.setPreferredWidth(100);

// 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) ? Color.black : Color.red);
setText((value == null) ? "" : value.toString());
}
};
numberColumnRenderer.setHorizontalAlignment(JLabel.RIGHT);
numbersColumn.setCellRenderer(numberColumnRenderer);
numbersColumn.setPreferredWidth(110);

// Finish setting up the table.
JScrollPane scrollpane = new JScrollPane(tableView);
scrollpane.setBorder(new BevelBorder(BevelBorder.LOWERED));
scrollpane.setPreferredSize(new Dimension(430, 200));
frame.getContentPane().add(scrollpane);
frame.pack();
frame.setVisible(true);
}

public static void main(String[] args) {
new TableExample4();
}
}

When i resize the application window there is this extra grey space that becomes visible. I can't work out how to prevent this from appearing.

 

[hologram]

Just add the next line :

tableView.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS);

[ PS : this will also let the horizontal scrollbar disappear ]

 

[new2this2002]

Tried adding that line it still shows unwanted gray space when you enlarge the window.

 

[egobbitz]

Make sure you comment out this line before adding the other line;

tableView.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);

I tried it and it worked.

Nick