curious codes

Testing availability of your webserver from the Internet without NAT-loopback

thomaswiese — Wed, 27 May 2009 17:56:11 +0000

I wanted to test, wether my webserver is available from the Internet. But there was a little problem with the DSL-Router which doesn’t support NAT loopback.
I configured the Router with port-forwarding for port 80 to my webserver. When I tried to use the WAN IP of the Router in my Browser, I connected always to the configuration site of my router (which isn’t available from the Internet but inside the LAN. The problem is, that the Router finds „the other side“ (itself via the WAN-IP) but is then using a connection directly from the computer to the router without notice if the port-forwarding rule.
The workaround here is usage of one of the numerous free web proxies e.g. http://anonymouse.org/
Because the proxy starts his own request from the WAN side, the above effect does not occur.

Installing PHP5 with Apache webserver 2.2

thomaswiese — Wed, 27 May 2009 17:34:35 +0000

In this example, the php-installation is in C:\PHP, the Apache installation in C:\Program Files\Apache Software Foundation\Apache2.2

1. Copy php5apache2_2.dll to:
C:\Program Files\Apache Software Foundation\Apache2.2\modules
(or the equivalent directory for your installation)

2. Copy php5ts.dll to:
C:\Program Files\Apache Software Foundation\Apache2.2\bin
(or the equivalent directory for your installation)

3. Edit httpd.conf adding:
LoadModule php5_module modules/php5apache2_2.dll
AddType application/x-httpd-php .php
PHPIniDir „C:/PHP/“

The Number of JInternalFrames

thomaswiese — Wed, 22 Apr 2009 20:58:44 +0000

To get the number of the created JInternalFrames it is the easiest way to work with a static variable within a class extended from JInternalFrame:

public class CompanyFrame extends javax.swing.JInternalFrame { static int count; // the static counter public CompanyFrame() { // constructor count++; // your code here jLabel1.setText(String.valueOf(count)); }

Setting the System look and feel

thomaswiese — Sun, 19 Apr 2009 11:49:44 +0000

@Override protected void initialize(String[] args){
JFrame.setDefaultLookAndFeelDecorated(true);
try {
// Set System L&F
UIManager.setLookAndFeel(
UIManager.getSystemLookAndFeelClassName());
}
catch (UnsupportedLookAndFeelException e) {
// handle exception
}
catch (ClassNotFoundException e) {
// handle exception
}
catch (InstantiationException e) {
// handle exception
}
catch (IllegalAccessException e) {
// handle exception
}

Substance look and feel with Swing Application Framework

thomaswiese — Sun, 19 Apr 2009 11:35:59 +0000

Both won’t work together if the laf-setting is not in the initialize()-Method. Used in this method, there will still be an error, but the laf will be set correctly.
@Override protected void initialize(String[] args){
JFrame.setDefaultLookAndFeelDecorated(true);
try {
UIManager.setLookAndFeel(new SubstanceChallengerDeepLookAndFeel());
} catch (Exception e) {
System.out.println(„Look and feel failed to initialize“);
}

ERROR:“Component creation must be done on Event Dispatch Thread“