Object Oriented Programming (w/ Java)

Java is...

• A Functional Programming Language

• An Object Oriented Programming Language

• A Procedural Programming Language

• A Weakly Typed Programming Language

A class is...

• Where you store data

• A place you learn

• Like a blueprint for objects

• Where you run code

A constructor...

• Creates information for the class

• Is someone who builds things

• Adds information to an object

• Allows an instance of the class to be created

How do you write a constructor?

• public void ClassName() {

  }

• public returnType ClassName() {

  }

• constructor ClassName() {

  }

• public ClassName() {

  }

Where are details in the class saved?

• In your brain

• In methods

• In instance fields

• In the constructor

An instance field can be...

• A primitive data type

• A method

• Another object

• A constructor

Construction parameters allow you to...

• Add more types of details to a class

• Set starting values for instance fields

• Call more methods on the object

• Create multiple objects at once

Code inside the main method is...

• Compiled and executed

• Just compiled

• Deleted

• Useless

What is an object?

• Everything

• An instance of a class

• A detail of a class

• A class of details

How do you create an object?

• variableName = new ClassName();

• ClassName variableName = ClassName();

• Object variableName = ClassName();

• ClassName variableName = new ClassName();