1. Development Environment Basics
Dominik Gehl
May 3rd, 2004
Development Environment Basics
Developing the Tools
May 3rd, 2004
Montréal, Québec
Dominik Gehl
Hôpital Ste-Justine, Montréal
Lecture 1.2
(c) 2004 CGDN

2. Lab Objectives Become familiar with: Linux Eclipse Command line basics
Editors
Eclipse
Create a new Java Project
Configure preferences
Connect to a CVS server
Lecture 1.2

3. Linux – Short Command Reference
List directory content ls –al directory/
Change directory cd ../../destination/ cd -
Copy file cp source.txt destination.txt
Move or rename file mv source.txt destination.txt
Lecture 1.2

4. Other Useful Commands Lost in the directory tree ? pwd
Don’t know who you are anymore ? whoami
Which files are executed ? which executableName
Need help ? info command man command
Lecture 1.2

5. Finding Files Several tools exist to help you find your files
By filename find / -name ”*pattern*”
find can also be used to find files which have been modified in the last several days/hours/minutes etc.
By file content fgrep –recursive –i pattern *
Lecture 1.2

6. Let’s Find Eclipse Eclipse is installed on your computer … but where ?
Is it in the path ? which eclipse
Let’s search for the filename “eclipse” find / -name “eclipse” find / -name “eclipse”
… we can now start eclipse by typing /soft/diro/opt-linux-redhat-9.0/eclipse-3.0/eclipse
Lecture 1.2

7. Linux File Permissions
Permissions can be given to read, write and execute files and directories
Execute a directory means to be able to cd into the directory
Read a directory means to be able to ls the files in the directory
File permissions are given on a user, group, and ‘everyone else’ basis
Lecture 1.2

8. File Permission Values
rw-r--r-x means that the owner has read and write rights, the group read-only rights and ‘everyone else’ read and execute
r has a value of 4, w of 2 and x of 1
Calculate the sum and you have to numerical permission values (645 in the above example)
Permissions can be changed with chmod
Lecture 1.2

9. Linux References The Linux Documentation Project http://www.tldp.org
Introduction to Linux – A Hands on Guide
The Linux System Administrators’ Guide
Lecture 1.2

10. Secure File Transfers
ssh allows you to execute commands on a remote server ssh –l login serverName
scp allows to copy files between different computers scp . scp file
If you don’t want to type your password every time, have a look at ssh-keygen
Lecture 1.2

11. Editing Files Several editors are available:vi
Emacs
Pico
The most used ones are vi and emacs (both are installed by default and work in text-only mode)
Lecture 1.2

12. Emacs Command Reference
Quit Ctrl-x Ctrl-c
Save Ctrl-x Ctrl-s
Save As Ctrl-x Ctrl-w
Cancel Ctrl-g
Select bloc Ctrl-Space
Cut bloc Ctrl-w
Paste bloc Ctrl-y
Lecture 1.2

13. Vi Command Reference Quit Esc : q Save Esc : w
Quit without saving Esc : q!
Save and quit Esc : wq
Lecture 1.2

14. Editor References Emacs Vi
Main site
Documentation and more
Printable reference card Vi
Lecture 1.2

15. Shells
Different ‘shells’, which allow you to enter commands, are available:
Ksh
Csh
Bash
Until the end of the week, we will be using the bash shell.
Lecture 1.2

16. Setting Environment Variables
To check the setting of an environment variable, you can use the echo command: echo $PATH
Set an environment variable JAVA_HOME=/usr/java/j2sdk1.4.2_01 export JAVA_HOME
To permanently set variables, enter the above commands in the .bashrc file
Lecture 1.2

17. Bash Programming Basics
Do something to several files for i in `ls` do echo $i other commands here done
If statements if [ -d fileName ]; then commands fi
Lecture 1.2

18. Bash References Main site http://www.gnu.org/software/bash/bash.html
Advanced Bash-Scripting Guide
Lecture 1.2

19. Eclipse Main Window
Lecture 1.2

20. Create New Project
File – New Project
Lecture 1.2

21. Create New Class
File – New Class
Lecture 1.2

22. Edit Code
Lecture 1.2

23. Run Application
Lecture 1.2

24. Classpath
Lecture 1.2

25. Add Variable to Classpath
Lecture 1.2

26. Debug from Eclipse
Debugging can be done by inserting System.out.println statements all over your code … or (much better)
Logging libraries (Log4j)
By using the debugger integrated into Eclipse
Just set a breakpoint after the start of the main method by double-clicking on the bar left of the edit window
Lecture 1.2

27. Setting a breakpoint
Lecture 1.2

28. Start Debugging
Lecture 1.2

29. Run Step by Step
Lecture 1.2

30. Run Step by Step
Lecture 1.2

31. Configuration - Tabs or Spaces
Lecture 1.2

32. Configuration - Tabs or Spaces
Lecture 1.2

33. Configuration - Indentation
Lecture 1.2

34. Configuration - Indentation
Lecture 1.2

35. CVS
Lecture 1.2

36. Eclipse References Main site http://www.eclipse.org
Eclipse FAQ
Eclipse Plugins
Lecture 1.2