Download Getting Java on Your Computer

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The JDK (Java Development Kit)
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An IDE (Integrated Development Environment)
◦ Different IDEs include:
 JCreator
 NetBeans
 BlueJ
We will be using
BlueJ
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Java Development Kit (JDK)
Compiler
Debugger
Other tools
Java Runtime Environment (JRE)
Java platform
core classes
Java Virtual Machine (JVM)
Supporting Java
platform
libraries
Integrated Development Environment (IDE)
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Java Development Kit (JDK)
A JDK includes the JRE, compiler, debugger and other tools for developing applets
and applications.
Compiler
Debugger
Other tools
Java Runtime Environment (JRE)
The JRE is what you get when you download Java software. The JRE is the
runtime portion of Java software.
Java platform
core classes
Supporting Java
platform
libraries
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)
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Creating and running your
application
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Select ‘New Project’ from the ‘Project’ Menu
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Choose where to save your new folder.
Hit the ‘Create’ button.
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Select ‘New Class’
Name your class and press ‘OK’
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Double-click your class to write your code
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Once you’ve written some code, hit ‘Compile’.
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Right-click on the class holding the method
‘main’.
Select and click method ‘main’ to run.
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Select ‘Create JAR File’ from the Project Menu.
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If 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:
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Accept Licence Agreement
Select the product for your system
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