How to install(use) NSG2(NS2 Scenarios Generator 2) in ubuntu 10.0.4
 

Hello All,

I want to use NSG2 in Ubuntu.
But I'm unable to use it!!
I already install java and download NSG2 from https://sites.google.com/site/pengjungwu/nsg!!!
But I encounter the problem as follow!
So, How to solve this problem?
Please Help Me ,Sir!!!
kmw@ubuntu:~$ java -version
java version "1.6.0_24"
OpenJDK Runtime Environment (IcedTea6 1.11.4) (6b24-1.11.4-1ubuntu0.10.04.1)
OpenJDK Client VM (build 20.0-b12, mixed mode, sharing)
kmw@ubuntu:~$ java -jar NSG2.jar
Exception in thread "main" java.awt.HeadlessException
at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:173)
at java.awt.Window.<init>(Window.java:477)
at java.awt.Frame.<init>(Frame.java:419)
at javax.swing.JFrame.<init>(JFrame.java:218)
at nsg.NSG2.<init>(NSG2.java:51)
at nsg.NSG2.main(NSG2.java:253)
kmw@ubuntu:~$

Try running it in the headless mode.... or using a headless JVM.

dear EODSteven,
Thank You so much for your helping!!!
But I don't know how to run it in the headless mode?
Please guide me in detail,sir!!!

Best regards,
khinmyo

How do you execute your program? I think we need to create a script file to add that variable into the java...let me know I have a simple script my grandson uses to play a game but I have to swith to linux to retreive it.

The answer was right in front of me....edit this command to go headless and it should fix it!

add the headless switch

java -jar NSG2.1.jar
... Runs OK with sun-java6-jdk : Starts as a very tiny GUI.

sudo apt-get install sun-java6-jdk
.

Gonna have to upgrade to 7, I tried to download this and got this....

# 7


Synaptic > Settings > Repositories : Other Software
... and then mark "non-free".

Next : Refresh, and install 'sun-java6-jdk'.

( sudo apt-get update && sudo apt-get install sun-java6-jdk ).


.

Hello sir!
Thank you very much for your guide line!
But, still now , I'm not ok to run NSG2.
So,please help me ,sir!
I will never forget your kindness!

kmw@ubuntu:~$ java -version
java version "1.6.0_24"
OpenJDK Runtime Environment (IcedTea6 1.11.4) (6b24-1.11.4-1ubuntu0.10.04.1)
OpenJDK Client VM (build 20.0-b12, mixed mode, sharing)
kmw@ubuntu:~$ java -jar NSG2.1.jar
Exception in thread "main" java.awt.HeadlessException
at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:173)
at java.awt.Window.<init>(Window.java:477)
at java.awt.Frame.<init>(Frame.java:419)
at javax.swing.JFrame.<init>(JFrame.java:218)
at nsg.NSG2.<init>(NSG2.java:57)
at nsg.NSG2.main(NSG2.java:297)
kmw@ubuntu:~$ java -Djava.awt.headless -jar NSG2.1.jar
Exception in thread "main" java.lang.UnsatisfiedLinkError: Can't load library: /usr/lib/jvm/java-6-openjdk/jre/lib/i386/xawt/libmawt.so
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1649)
at java.lang.Runtime.load0(Runtime.java:787)
at java.lang.System.load(System.java:1022)
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1750)
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1667)
at java.lang.Runtime.loadLibrary0(Runtime.java:840)
at java.lang.System.loadLibrary(System.java:1047)
at sun.security.action.LoadLibraryAction.run(LoadLibraryAction.java:67)
at sun.security.action.LoadLibraryAction.run(LoadLibraryAction.java:47)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.Toolkit.loadLibraries(Toolkit.java:1614)
at java.awt.Toolkit.<clinit>(Toolkit.java:1636)
at java.awt.Component.<clinit>(Component.java:582)
Could not find the main class: nsg.NSG2. Program will exit.
kmw@ubuntu:~$

Sorry, the sun-java packages were removed from 10.04 ealier this year ..
http://www.bytespring.com/blog/sun-j...04-repostitory

The easy way : Cheating an rpm package install ..
1) sudo apt-get install rpm
2) sudo rpm -Uvh --nodeps jdk-1.6.0_35-fcs.i586.rpm --force-debian
http://ftp.scientificlinux.org/linux...5-fcs.i586.rpm
3)
sudo update-alternatives --install /usr/bin/java java /usr/java/jdk1.6.0_33/bin/java 2
4)
sudo update-alternatives --config java
... And then choose the "/usr/java/jdk1.6.0_35/bin/java" entry.


Ubuntu 10.04 : java -jar NSG2.1.jar : Opens OK with "jdk1.6.0_35"
NSG2.1 https://sites.google.com/site/pengjungwu/nsg
EDIT : Both versions NSG2.jar, NSG2.1.jar work OK here with OpenJDK and the "sun jdk".

.