getting started with java
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Getting Started With Java. Downloading and installing software Running your first program Dr. DwyerFall 2012. Objective. Set up a development environment on your laptop/desktop and run a program. What tools do you need?. Components of the Java language - PowerPoint PPT PresentationTRANSCRIPT
Getting Started With JavaDownloading and installing softwareRunning your first program
Dr. Dwyer Fall 2012
ObjectiveSet up a development
environment on your laptop/desktop and run a program
What tools do you need?Components of the Java language
◦Tool to test whether your program complies with Java syntax requirements (Java compiler – javac)
◦Documentation describing what tools are available in Java
◦Java runtime environment (JRE) – a kind of utility (like a plug-in) that runs Java code on a client (like a laptop or a phone)
Software DevelopmentEclipse – is a tool that makes it
easier to develop softwareOpen sourceCan support other languages
besides Java◦Editor – for writing code◦Support for testing – way to run
code, display output, and other tools for fixing programming errors
Software downloads (2 parts)Java Development Kit (JDK)
includes JRE – Java Runtime Environment
Most recent version Java SE (Standard Edition) 7update 6
Google Java JDK (will include links to instructions)
Java SE Downloads
Downloading EclipseDownload “Eclipse IDE for Java
Developers”http://www.eclipse.org/downloads
/Consult instructions for
installation depending on your operating system
32 bit or 64 bit? – doesn’t matter, but 64 bit does not work with Chrome (use Firefox)
Starting EclipseSelect a workspace
◦This is like “My Documents” for eclipse, a place to keep all files related to your programs
◦Can keep default or change it to a place easy to find (like the desktop)
Step 1: Create a new project(Eclipse menu – File, new, New Java Project)
Create a projectWhat is a project?
◦Container for a collection of software components
◦Need a project in order to run code in Eclipse
◦We will start off with a simple project with one class
Add a Class – right click on project
What is a class?Container for a unit of codeEvery Java program has at least
one classClass name must begin with
CapitalCheck box to create “main”
method stub◦What if you forget?◦Option one – delete the class and
add another one with a different name
◦Option two – need to type “public static ….”
Java program stub
Running a program
Program output
Your AssignmentInstall Java and Eclipse, run the
program in listing 1.1Take a screenshot of your
program after it runs, copy it into a Word document with your name and upload to Blackboard
Recommendations for beginning programmersPractice by typing in examples
from the book EXACTLY as you see them
Java expects perfectionJava does not tolerate sloppy
typing LOL!Be humble – if it does not work,
something really is wrong
Recommendations cont.Use the Internet – lots of tutorials
and videos availableAsk your instructorAsk your class mates and other
Seidenberg students for help
What if you get stuck?Come to Seidenberg School
offices with your laptop and ask tutors or other students for help
Email me for helpUse Google and YouTube to find
Java/Eclipse videos/tutorials