java programming: getting started

Java Programming:Getting Started

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The JDK (Java Development Kit)

An IDE (Integrated Development Environment)

◦ Different IDEs include: JCreator NetBeans BlueJ

What you will need

We will be using BlueJ

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What is the JDK?Java Development Kit (JDK)

Compiler Debugger

Other tools

Java Runtime Environment (JRE)

Java platform core classes

Supporting Java platform

libraries

Java Virtual Machine (JVM)

Integrated Development Environment (IDE)

Marlene GaleaMarlene Galea – HoD Computing

What is the JDK?Java Development Kit (JDK)

Compiler Debugger

Other tools

Java Runtime Environment (JRE)

Java platform core classes

Supporting Java platform

libraries

A JDK includes the JRE, compiler, debugger and other tools for developing applets and applications.

The JRE is what you get when you download Java software. The JRE is the runtime portion of Java software.

Java Virtual Machine (JVM)

The JVM is software that converts the Java intermediate language

(bytecode) into machine language and executes it.

Integrated Development Environment (IDE)

An IDE e.g. NetBeans is used to edit, compile and debug Java code.

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Go to http://www.bluej.org/ and download BlueJ

You may use the JDK and BlueJ combined installer (or you may download the JDKseparately – see here)

Getting an IDE (BlueJ)

Using BlueJCreating and running your application

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Select ‘New Project’ from the ‘Project’ Menu

Starting a new project

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Choose where to save your new folder. Hit the ‘Create’ button.

Create your Project

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Select ‘New Class’ Name your class and press ‘OK’

Starting a New Class

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Double-click your class to write your code

Coding your class

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Once you’ve written some code, hit ‘Compile’.

Writing and Compiling your class

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Right-click on the class holding the method ‘main’.

Select and click method ‘main’ to run.

Running your program

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Select ‘Create JAR File’ from the Project Menu.

Creating an executable file

JDK DownloadIf you want to ONLY download the JDK, follow the following steps.

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Click this link to go to the Oracle page from where you can download the JDK

Select ‘Download Java’ as shown:

Downloading the JDK

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Accept Licence Agreement Select the product for your system

Downloading the JDK [...cntd]

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Happy Coding!