Introduction to Eclipse
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Transcript Introduction to Eclipse
Introduction to Java Lab
CS110A – Lab
Section 004
Instructor: Duo Wei
Outline
General Information for Java Lab
Introduction to Eclipse
First program– “Hello World!”
General Information
Instructor: Duo Wei
Office: GITC 4402
Office hours: Friday 5-6pm
Email: [email protected]
For more information, please visit my
website:
http://web.njit.edu/~dw59
What is Eclipse?
An Integrated Development Environment
Useful tool for Java program development
Provides many features to ease Java
programming (and others, e.g. C/C++)
Editor
Debugger
Source Control
…
Getting Eclipse
At the CS labs…
It’s already installed
At home…
Download the latest version at:
http://www.eclipse.org/
Installing and Running Eclipse
Installation is very simple
Just unpack the downloaded package
Running Eclipse
Then click eclipse.exe (under Windows)
Run eclipse (under Linux)
Eclipse will start running if all the prerequisites are
met
Demo: Run Eclipse
Setting up your Workspace
Workspace is where your projects and
programs are stored.
Usually some directory in the file system
The workspace is set when Eclipse starts
My suggestion: create a file in the local
directory.
Eg. My Document create your file (Duo)
Creating Java Projects
Demo: Creating a project for
assignment1 in the workspace
Creating Java Packages
A Package in Java is a group of classes which are
often closely or logically related in some way
Package corresponds to the directory hierarchy
in the file system.
course.cs110.assignment1
Organizing source files into different packages is
a good programming style.
Since this is the first class you do not need to
create package. Create class directly, see next
slide …
Adding Java Classes
Class is the basic compilation unit in
Java.
Demo: Creating the Employee class of
assignment1
Running the code
Currently, no implementation is provided in
the given files. You are expected to fill the
implementation details.
We need a class which has a main() method
as the entrance for execution
Run (Menu) Run as find your java file
click
Review what we learned…
Setting up your Workspace
Creating Java Projects
Creating Java Packages (not necessary)
Adding Java Classes
Running the code
First Java program-HelloWorld
public class HelloWorld{
public static void main(String args[]){
System.out.println(“Hello World!”);
}
}
Now, run the program, and see what is the
output?
Questions?