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Essential Programming Concepts: Exploring Jeroo and Java

Learn key programming concepts with Jeroo, a fun program where you create commands for objects. Understand programming basics, syntax, OOP, and compiling processes.

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Essential Programming Concepts: Exploring Jeroo and Java

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  1. Vocabulary

  2. Programming Vocabulary • Watch closely, you might even want to take some notes. There’s a short quiz at the end of this presentation! • Jeroo is a fun program. You get to make things hop around an island on a great variety of adventures. • In the process you can learn a lot about programming.

  3. Essential Concepts • In Jeroo you write your own programs. You type in the instructions to make Jeroos follow your commands. The code you type in is called your source code. • Definitions: • Program– a set of instructions for the computer • Source code – a program written by a programmer in a programming language

  4. TRANSLATING • The computer cannot really understand the source code you type in. It has to be translated into something much simpler that a computer processor can understand. The compiler will turn your program into a form that can be processed. • Definitions: • Compiler – translates a program (or class) as a whole into another form such as byte code or machine code • Java Byte Code – intermediate language created by the Java compiler. The JVM translates byte code into machine code. • Machine Code – program in the form of binary codes - a series of 1’s and 0’s - that are understandable by the computer’s CPU

  5. One really nice thing about Jeroo is that it has an interpreter. It translates your source code one line at a time and tells the Jeroo to follow your instructions one at a time so you can see it working. • Definition: • Interpreter – translates a program into machine language one statement at a time

  6. Essential Concepts • Before you can write a program, you should have a plan. This is your algorithm. Then you have to type in your instructions following the syntax of the language you are using. Jeroo uses Java syntax like this: • Definitions: • Algorithm – a plan for solving a problem • Syntax – a set of rules for writing or speaking a language • Semantics – the meaning associated with valid expressions

  7. Essential Concepts - OOP • A Jeroo is an object. There are things you know about it, its properties, that can change, such as where it is and how many flowers it has, and there are the methods which are things it can do. • Definitions: • Object – represents a specific concept or item that is relevant to a problem to be solved. There are 3 parts to an object, facts about the object, how it is created, and tasks it can perform. • Attribute – is a fact associate with a specific object. Describes things about the object at the current time. Also known as a property or instance data. • Behavior – is an action an object can perform in response to a request from an external source. You write code to turn a behavior into a method.

  8. Essential Concepts - OOP • Method – a collection of statements that are written in some programming language to describe a specific behavior • Method Precondition – something that is assumed to be true before the method is invoked • Method Postcondition – something that is assumed to be true after the method has been executed

  9. Essential Concepts - OOP • Class – is a collection of statements that are written in some programming language to describe both the attributes (properties) and the behaviors (methods) of an object. • Instantiation – the process of creating a specific object.Jeroo clyde = new Jeroo();clydeis an instance of the Jeroo class.This is also called constructing an object. Construct = Instantiate

  10. __Compiler __Object __Algorithm __Byte code __Interpreter __Syntax __Attribute __Source code __Instantiate __Method __Class A plan for solving a problem Translates one line of code at a time Create a new object in your program. Information about the current state of an object Part of a program that describes how an object can accomplish a particular behavior. Rules of how a language must be written. Translates a whole program all at once Defines properties and methods of an object The code you, the programmer, type in The code the computer understands One thing you can use in your program that has attributes and methods – Match words with definitions

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