Greenfoot / JF_V02_S03_L12

Java Fundamentals

Creating an Inventory of Java Fundamentals

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Creating an Inventory of Java Fundamentals

Overview

This lesson covers the following topics:

•List and define Java Programming terminology

•Recognize and label Java programming constructs

•Identify incorrect Java programming syntax

•List programming tasks to design and implement a game using Java

•List five variations to include in programming Q/A tests

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Creating an Inventory of Java Fundamentals

Programming Concepts and Terms

•A computer program is a sequence of instructions that tells the computer what to do.

•Learning to program includes:

–Thinking about and capturing a sequence of instructions.

–Breaking down a problem into smaller tasks.

–Writing comments to inform other programmers.

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Creating an Inventory of Java Fundamentals

Alice 3 Programming Concepts and Terms

•In the animation development process:

–A scenario describes an overall animation.

–A storyboard can be visual or textual.

•Alice 3 objects:

–Are three dimensional.

–Are animated in a virtual world.

–Are created from a gallery of classes.

Move in six directions.

–Have their own orientation.

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Creating an Inventory of Java Fundamentals

Alice 3 Programming Concepts and Terms

•A program:

–Consists of lines of code.

–Is structured in blocks (Do together).

•Functions:

–Provide the properties of an object.

–Can be used to compute a value.

–When boolean, return a true or false value.

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Creating an Inventory of Java Fundamentals

Alice 3 Programming Concepts and Terms

•Conditional control structures:

–Use relational operators to compare boolean expressions.

–Are used to make a decision.

•Repetition control structures:

–Repeat a section of code based on a true boolean expression.

–Are referred to as loops.

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Creating an Inventory of Java Fundamentals

Greenfoot Concepts and Terms

•Greenfoot scenarios consist of a set of classes.

•Greenfoot objects:

–Are created from a class.

–Are placed in a world are known as actors.

–Have methods.

•Greenfoot classes:

–Are defined by source code.

–Have subclasses, which are a specialization of a class.

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Creating an Inventory of Java Fundamentals

Greenfoot Concepts and Terms

•Greenfoot methods:

–Signatures are a specification of a method.

–Use the static keyword in their signature if they belong to a class.

–Use dot notation to call a static method from another class.

–Can be defined for a new action, then called in the act method.

–Return types specify what a method will return.

•Void return types do not return data.

•Parameters:

–Are used to pass data to a method.

–Have types (int, boolean).

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Creating an Inventory of Java Fundamentals

Greenfoot Concepts and Terms

•Source code must be compiled.

•Comments are ignored by the computer.

•Constructors are a special kind of method.

•Instance variables, also known as fields, store information.

•The double equal symbol = = tests equality.

•IF-ELSE execution is based on a given condition.

9Copyright © 2012, Oracle and/or its affiliates. All rights reserved.

Creating an Inventory of Java Fundamentals

Java Programming Terms

10Copyright © 2012, Oracle and/or its affiliates. All rights reserved.