import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class f extends JFrame
{
f()
{
String[] columnNames = {"First Name",
"Last Name",
"Sport",
"# of Years",
"Vegetarian"}; Object[][] data = {
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", "Milne",
"Pool", new Integer(10), new Boolean(false)}
};
JTable table = new JTable(data,columnNames);
add(table);
setSize(681,479);
show();
}
public static void main(String args[])
{
f h=new f();
h.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
请问一下，为什么显示不了JTable table = new JTable(data,columnNames);中的columnNames
import java.awt.*;
import java.awt.event.*;
public class f extends JFrame
{
f()
{
String[] columnNames = {"First Name",
"Last Name",
"Sport",
"# of Years",
"Vegetarian"}; Object[][] data = {
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Knitting", new Integer(2), new Boolean(false)},
{"Sharon", "Zakhour",
"Speed reading", new Integer(20), new Boolean(true)},
{"Philip", "Milne",
"Pool", new Integer(10), new Boolean(false)}
};
JTable table = new JTable(data,columnNames);
add(table);
setSize(681,479);
show();
}
public static void main(String args[])
{
f h=new f();
h.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
请问一下，为什么显示不了JTable table = new JTable(data,columnNames);中的columnNames
* @(#)TableExample3.java 1.16 04/07/26
*
* Copyright (c) 2004 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* -Redistribution of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* -Redistribution in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
* ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
* OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN")
* AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
* AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
* DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
* REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
* INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
* OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
* EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed, licensed or intended
* for use in the design, construction, operation or maintenance of any
* nuclear facility.
*//*
* @(#)TableExample3.java 1.16 04/07/26
*//**
* An example showing the JTable with a dataModel that is not derived
* from a database. We add the optional TableSorter object to give the
* JTable the ability to sort.
*
* @version 1.3 10/14/97
* @author Philip Milne
*/import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.Dimension;import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableModel;public class TableExample3 { public TableExample3() {
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), Boolean.TRUE},
{"Tom", "Ball", "Blue", new Integer(99), Boolean.FALSE},
{"Alan", "Chung", "Green", new Integer(838), Boolean.FALSE},
{"Jeff", "Dinkins", "Turquois", new Integer(8), Boolean.TRUE},
{"Amy", "Fowler", "Yellow", new Integer(3), Boolean.FALSE}
}; // Create a model of the data.
TableModel dataModel = new AbstractTableModel() {
/**
*
*/
private static final long serialVersionUID = 1L;
// 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];}
@SuppressWarnings("unchecked")
public Class getColumnClass(int col) {return getValueAt(0,col).getClass();}
public boolean isCellEditable(int row, int col) {return (col==4);}
public void setValueAt(Object aValue, int row, int column) {
test();
data[row][column] = aValue;
}
}; // Instead of making the table display the data as it would normally with:
// JTable tableView = new JTable(dataModel);
// Add a sorter, by using the following three lines instead of the one above.
TableSorter sorter = new TableSorter(dataModel);
JTable tableView = new JTable(sorter);
sorter.addMouseListenerToHeaderInTable(tableView); JScrollPane scrollpane = new JScrollPane(tableView); scrollpane.setPreferredSize(new Dimension(700, 300));
frame.getContentPane().add(scrollpane);
frame.pack();
frame.setVisible(true);
}
public void test(){
System.out.println("I Love this Game !");
}
public static void main(String[] args) {
new TableExample3();
}
}