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Elements and Performance Criteria

1. Create Java source file
   • Create a file with a text editor
   • Create a sub-class of the class Java.applet.
   • Ensure that applet sub-class implements at least one of the following methods: init and paint
   • Define classes that contain instance variables, methods and local variables
   • Ensure that the init method initialises instance variables, and constructs any graphical interface used in the applet sub-class
   • Implement the paint and update methods to manage output that is drawn in the applet window
   • Incorporate event handling methods
   • Implement the code that allows a user to enter values, and assigns these values to variables
   • Use available graphical user interface (GUI) components to allow user interaction with the applet
   • Specify and load images and sounds
   • Include comments to describe the behaviour of the applet
2. Compile a source file
   • Use a Java compiler to compile the file
   • Correct errors detected by the compiler
   • Confirm basic correctness of the file, to ensure that all variables have been initialised
   • Ensure the compiler creates a class file, and that the class is interpreted correctly
3. Run applet
   • Create and name a hypertext markup language (HTML) file, and add APPLET tag
   • Write the applet class file to match the HTML document that contains an APPLET tag
   • Confirm that the applet loads and executes correctly
   • Identify and correct run-time errors
   • Identify and correct logic errors
   • Ensure that the appearance of the applet window renders it accessible and intuitive for the user, and that its design complies with organisational standards
   • Ensure that user interaction is implemented efficiently and effectively

Performance Evidence

Evidence of the ability to:

review the requirements to provide an applet that executes in Java-enabled browsers, and allows users to customise the applet's operation

write, compile and run an applet that accepts user input, and generates a response based on the input.

Note: If a specific volume or frequency is not stated, then evidence must be provided at least once.

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Knowledge Evidence

To complete the unit requirements safely and effectively, the individual must:

explain object-oriented programming concepts

outline the theoretical concepts of Java programming

recognise, and describe, the Australian Computer Society Code of Ethics

identify the sources of browser security restrictions.

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