Very good Class Diagram viewer of Java source code within Eclipse Plugin

The ObjectAid UML Explorer for Eclipse

For Class Diagram, it's free to use. But for sequence diagram, it is licensed. Please refer to http://www.objectaid.com/products.

Installation and Tutorial

• Installation
• Class Diagram 
• Sequence Diagram 

Launch czt-ide from the Eclipse and Create a new project

1. After successful import and build of CZT in Ubuntu, we can launch the czt ide from the Eclipse.

• Select the "net.sourceforge.czt.eclipse.repository" project, and right click the czt-ide.launch file, select the "Run As -> czt-ide"
• An error about "-XstartOnFirstThread" is not a recognized option for java
• Just open the Run configuration edit dialog and delete this option in the "Arguments -> VM Arguments"
• Then launch again. Succeed.

2. Create a new project circus2bcsp

• Create a new "Java Project" from the Eclipse
• Input the name "Main" and Package "net.sourceforge.czt.circus2bcsp"
• Copy the content of Main.java in z2b project and paste to Main.java in this project
• There's some errors such as "import  net.sourceforge.czt.session.Filesource can be resolved"
• Open the project properties of circus2bcsp, and go to the Project tab of Java Build Path, add the necessary projects to build together.
• Then the error will be disappeared

Enable SSH X11Forwarding to access Ubuntu from the local Mac OS X

X11Forwarding config in ssh can enable the remote desktop access from the local client. This is a set up of access between Ubuntu server and local Mac Client.

1. Ubuntu Server

• make sure the X11Forwarding option in /etc/ssh/sshd_config is set to yes. If not, set it to yes, and restart the sshd service by "sudo service ssh restart"
• test X11Forwarding in server
• Open a terminal in Ubuntu, and "ssh -v -X localhost" to establish the ssh connection with X11Forwarding. 
• Check if there's a line with "Requesting X11 Forward" shown in the debug output
• Check DISPLAY environment variables by "echo $DISPLAY" and it should be localhost:10.0

2. Mac OS X client
Reference: http://ruepprich.wordpress.com/2013/01/08/x11-forwarding-on-os-x-10-8-2-mountain-lion/

•  Install  XQuarz for Mac OS
• Open iTerm and add remote server to access list by "sudo xhost + 192.168.56.101"
• There's an error about 'xhost: unable to open display ""' 
• And ssh -X user@192.168.56.101 also failed to take X running

• Open XQuarz, and open "Terminal" in Application Menu
• bash-3.2$ xhost + 192.168.56.101
  192.168.56.101 being added to access control list
• bash-3.2$ ssh -X rye@192.168.56.101
• rye@rye-desktop:~$ echo $DISPLAY
  localhost:11.0
• xclock works