Guidelines For Using BlueJ
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ACM/JETT Workshop - August 4-5, 2005
Overview
1. Lecture: Using BlueJ
2. Lab Exercise - Compiling and Running a
simple program with BlueJ
3. Lecture - Introduction to jar files and
packages
4. Lecture + Lab Exercise - Compiling and
Running the Marine Biology Simulation
using BlueJ
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ACM/JETT Workshop - August 4-5, 2005
Using BlueJ
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Installing BlueJ
Creating a new BlueJ project
Creating a class file
Editing the class file using BlueJ
Opening the class file in the interface mode
Compiling the class file using BlueJ
Creating an instance of an object using BlueJ
ACM/JETT Workshop - August 4-5, 2005
Using BlueJ: Installing BlueJ
• BlueJ can be downloaded from
http://www.bluej.org
• J2SE SDK 5.0 can be downloaded from
http://java.sun.com/j2se
Installation on lap tops : In the open lab
time from 6 to 10 pm
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ACM/JETT Workshop - August 4-5, 2005
Using BlueJ: Creating a new BlueJ Project
(1 of 4)
Open BlueJ from the
Program Menu
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ACM/JETT Workshop - August 4-5, 2005
Using Blue J: Creating a new BlueJ Project
(2 of 4)
Left click on Project
and then again left click
on New Project
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ACM/JETT Workshop - August 4-5, 2005
Using BlueJ: Creating a new BlueJ Project
(3 of 4)
Enter the project name
and left click on create
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ACM/JETT Workshop - August 4-5, 2005
Using BlueJ: Creating a new BlueJ Project
(4 of 4)
A new project
is created !
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ACM/JETT Workshop - August 4-5, 2005
Using BlueJ: Creating a class file (1 of 2)
Left click on New Class
Enter class name in the new window
Left click on Ok
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ACM/JETT Workshop - August 4-5, 2005
Using BlueJ: Creating a class file (2 of 2)
A new class is
created !
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ACM/JETT Workshop - August 4-5, 2005
Using BlueJ: Editing the class file ( 1 of 2)
Right click on the class file and
then left click on Open Editor
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ACM/JETT Workshop - August 4-5, 2005
Using BlueJ: Editing the class file ( 2 of 2)
Implementation : Button to the right
The file opens up !
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ACM/JETT Workshop - August 4-5, 2005
Using BlueJ: Opening the class file in the interface mode
Interface : Button to the right
The fish class documentation can be seen !
The documentation cannot be edited from here !
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ACM/JETT Workshop - August 4-5, 2005
Using BlueJ: Compiling the class file
Right click on the class file
and then left click on
compile
Indicates an uncompiled
class
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ACM/JETT Workshop - August 4-5, 2005
Using BlueJ: Creating an instance of an object (1 of 3)
The class file got compiled !
Indicates a compiled
class
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Right click on class file
and left click on new MyFish()
ACM/JETT Workshop - August 4-5, 2005
Using BlueJ: Creating an instance of an object (2 of 3)
Left click on Ok
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ACM/JETT Workshop - August 4-5, 2005
Using BlueJ:
Creating an instance of an object (3 of 3)
The set and get methods can invoked from here
An instance
is created !
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ACM/JETT Workshop - August 4-5, 2005
Overview
1. Lecture: Using BlueJ
2. Lab Exercise - Compiling and Running a
simple program with BlueJ
3. Lecture - Introduction to jar files and
packages
4. Lecture + Lab Exercise - Compiling and
Running the Marine Biology Simulation
using BlueJ
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ACM/JETT Workshop - August 4-5, 2005
Lab Exercise - Compiling and Running a
simple program with BlueJ
1.
Use the BankAccount class from Example1.html. Complete the
code. Compile it. Create an instance and check if the
deposit(double amount) and withdraw(double amount) and
getBalance() methods work correctly – Solution is
BankAccount.java
2.
Use the BankAccount class from Example2.html. Complete the
code. Compile it. Create an instance and check if the getRate()
method works correctly. – Solution is BankAccountStatic.java
3.
These programs can be tested using Driver.java
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ACM/JETT Workshop - August 4-5, 2005
Overview
1. Lecture: Using BlueJ
2. Lab Exercise - Compiling and Running a
simple program with BlueJ
3. Lecture - Introduction to jar files and
packages
4. Lecture + Lab Exercise - Compiling and
Running the Marine Biology Simulation
using BlueJ
20
ACM/JETT Workshop - August 4-5, 2005
Introduction to jar files and packages
Taken as is from: Sections 4.3 and 5.5 of Objects First with Java-A Practical Introduction Using Blue J – David
J. Barnes and Michael Kolling
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(1 of 2)
Java calls its class libraries “PACKAGES”
Libraries typically contain many hundreds or thousands of
different classes that are useful to developers
Java uses packages to arrange library classes into groups that
belong together
Complete packages can be imported using
import package-name.*
A specific class can be imported using the full name. For example
import java.util.Random
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ACM/JETT Workshop - August 4-5, 2005
Introduction to jar files and packages
First 3 points taken as is from: Appendix E2 of Objects First with Java-A Practical Introduction Using Blue J –
David J. Barnes and Michael Kolling
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(2 of 2)
Java applications are usually distributed as
Java Archive format files (JAR files)
A number of different class files are
archived into a single file
A JAR file can be created as an executable
file
Tutorial on jar files :
http://java.sun.com/docs/books/tutorial/jar/
ACM/JETT Workshop - August 4-5, 2005
Overview
1. Lecture: Using BlueJ
2. Lab Exercise - Compiling and Running a
simple program with BlueJ
3. Lecture - Introduction to jar files and
packages
4.
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Lecture + Lab Exercise - Compiling and Running the
Marine Biology Simulation using BlueJ
ACM/JETT Workshop - August 4-5, 2005
Compiling the Marine Biology
Simualtion using BlueJ (1 of 4)
• Website reference:
http://www.bluej.org/help/ap.html
CONCEPT
All the jar files should be in +libs folder
The jar files in this project are
mbsbb.jar and mbsgui.jar
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ACM/JETT Workshop - August 4-5, 2005
Compiling the Marine Biology Simualtion
using BlueJ (2 of 4)
[taken as is from bluej website]
1.
Delete the 'Code' folder inside the
JavaMBS folder.
2. Replace it with the BlueJ_Code folder
downloaded from
http://www.bluej.org/help/ap.html
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ACM/JETT Workshop - August 4-5, 2005
Compiling the Marine Biology Simualtion using BlueJ (3 of 4 )
Directories in BlueJ_Code
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ACM/JETT Workshop - August 4-5, 2005
Compiling the Marine Biology Simualtion using BlueJ – (4 of 4)
Run MBSGUI from Chap1and2MBSGUI
Folder
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Open project Chap1and2MBSGUI (It has been already compiled)
Right click on MBSGUI and left click on void main (String [] args)
Hit Ok on the method call
Then on the simulation screen open a file called fish.dat
Click run on the simulation screen and observe the simulation
ACM/JETT Workshop - August 4-5, 2005