hostname.java

取得WEB客户机器主机名信息。

/* HostName.java  
 *
 * Raven
 * [e-mail]
 * http://www.ravenmatrix.com 
 *
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details at http://www.gnu.org 
 */



import java.applet.*;
import java.awt.*;
import java.net.*;



public class HostName extends Applet
{
String NameOfHost;
public void init()
{
try
{
InetAddress localAddress = InetAddress.getLocalHost();
NameOfHost = localAddress.getHostName();
}
catch(UnknownHostException e)
{
NameOfHost = "Unknown";
}
}



public void paint(Graphics g)
{
String VisitorMessage = "Welcome to Code Collection visitor from: "+NameOfHost;
g.setFont(new Font("Courier", Font.PLAIN, 12));
FontMetrics fm = g.getFontMetrics ();
int vmWidth = fm.stringWidth(VisitorMessage);
Dimension aSize = size(); // call getSize() in Java 1.2
int x = aSize.width/2 - vmWidth/2;
int y = aSize.height/2;
g.drawString (VisitorMessage, x, y);
}
}