Applet cannot read PARAM values: security exception

[VK]

That was a while ago when I last time worked with Java, so I might be
missing some recent security development. Any way:

Having a simple applet with hardcoded params it runs just fine on the
latest Java Plug-in 1.6.0_04 in both IE and Fx. If I put params into
PARAM tags then on getParameter it gives me SecurityException and
"Applet notinited" - the orthography is from plugin makers - in the
browser status bar. Is PARAM usage for applet is now locked? How do
workaround it then?

The applet in question is as simple as:

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

public class SockeR extends Applet {

public void init() {
this.setBackground(
// this works just fine, applet gets red:
Color.red
// using this instead of the above leads to error:
//Color.getColor(this.getParameter("bgcolor"), Color.white)
);
}

public void start() {
}

public void stop() {
}

public void destroy() {
}

public void paint(Graphics g) {
}

public String getAppletInfo() {
}
}

 

[Knute Johnson]

That was a while ago when I last time worked with Java, so I might be
missing some recent security development. Any way:

Having a simple applet with hardcoded params it runs just fine on the
latest Java Plug-in 1.6.0_04 in both IE and Fx. If I put params into
PARAM tags then on getParameter it gives me SecurityException and
"Applet notinited" - the orthography is from plugin makers - in the
browser status bar. Is PARAM usage for applet is now locked? How do
workaround it then?

The applet in question is as simple as:

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

public class SockeR extends Applet {

public void init() {
this.setBackground(
// this works just fine, applet gets red:
Color.red
// using this instead of the above leads to error:
//Color.getColor(this.getParameter("bgcolor"), Color.white)
);
}

public void start() {
}

public void stop() {
}

public void destroy() {
}

public void paint(Graphics g) {
}

public String getAppletInfo() {
}
}

Your problem is in trying to read the System properties not applet
parameters. I don't think this method has any use because, on my system
at least, there are no color values in the System properties. I don't
know if they were removed at some point or what. Use a decimal or hex
number and create your color with that instead of the string name. The
Color.decode() ought to be very useful here.

 

[Roedy Green]

try http://mindprod.com/jgloss/runerrormessages.html#NOTINITED

for the various causes of the not inited error.

 

[Roedy Green]

//Color.getColor(this.getParameter("bgcolor"), Color.white)

getColor gets system properties, something you need to sign the applet
for.

review http://mindprod.com/jgloss/applet.html#RESTRICTIONS

for the list of things you may not do without signing the applet.