Name: 🌶️ AP Comp Sci A Cram Review: Unit 2: Using Objects
Uploaded: 2021-03-14T18:00:00.000Z
Description: Unit 2: Using Objects

AP Computer Science A

Unit 1 – Primitive Types

Unit 2 – Using Objects in AP Computer Science A

Unit 3 – Boolean Logic & Conditional Statements

Unit 4 – Iteration in Programming

Unit 5 – Writing Classes in AP Computer Science A

Unit 6 – Array Basics in AP Computer Science A

Unit 7 – ArrayList in AP Computer Science A

Unit 8 – 2D Arrays in AP Computer Science A

Unit 9 – Inheritance in Object-Oriented Programming

Unit 10 – Recursion

Frequently Asked Questions

AP Cram Sessions 2021

First Unit

Previous Exam Prep

Study Tools

Exam Skills

Overview

1.1 Why Programming? Why Java?

1.2 Variables and Primitive Data Types

1.3 Expressions and Assignment Statements

1.4 Compound Assignment Operators

1.5 Casting and Ranges of Variables

Unit 1 Overview: Primitive Types

Why Programming? Why Java?

Variables and Data Types

Input Using the Scanner Class

Variables and Primitive Data Types

Expressions and Assignment Statements

Compound Assignment Operators

Casting

Rounding

Casting and Ranges of Variables


The Big Takeaway Of This Unit

Unit Overview

2.1: Objects: Instances of Classes


2.2 Creating and Storing Objects (Initialization)

2.3 Calling a Void Method

2.4 Calling a Void Method with Parameters


2.5 Calling a Non-Void Method


2.6 String Objects: Concatenation, Literals, and More


2.7 String Methods


2.8 Using the Math Class

Unit 2 Overview: Using Objects

What are Objects?

What is a Class?

Objects are Instances of Classes

Objects: Instances of Classes

Constructors and Initialization

Constructor Overloading

Null Objects

Creating and Storing Objects (Instantiation)

Introduction to Methods

Void Methods vs. Non-Void Methods

Static vs. Non-Static Methods

Methods Practice Problems

Calling a Void Method

How To Write and Call Methods With Parameters

Overloading Methods

Calling a Void Method With Parameters

Returning Integers/Doubles

Returning Booleans

Returning Strings

Returning Objects and Other Reference Types

Non-Void Methods Practice Problems

Calling a Non-Void Method

A Technical Look At Strings

Escape Characters

String Concatenation

String Concatenation Practice Problems

Summary of String Objects

String Objects: Concatenation, Literals, and More

Intro to External Libraries and APIs

About the String Class

String Method Practice Problems

String Methods

Introduction

Integer Wrapper Class

Double Wrapper Classes

Autoboxing

Practice Problems

Wrapper Classes: Integer and Double

Absolute Values

Exponents and Square Roots

Random Numbers

Using the Math Class

Unit 2 – Using Objects

The Big Takeaway Of This Unit


Unit Overview

Unit 3 Key Concepts

Unit 3 Overview: Boolean Expressions and if Statements

Boolean Operators

Boolean Expressions

If Statements and Control Flow

If-Else Statements

Else If Statements

Nested Conditionals

Boolean Logical Operators

Compound Conditional Statements

Compound Boolean Expressions

Proof By Simplification

Proof By Testing All Cases

Equivalent Boolean Expressions

What it Means When Objects Are Equal

The Equals Method

Comparing Objects

Unit 3 – Boolean Expressions & if Statements

4.1 While Loops

4.2 For Loops

4.3 Developing Algorithms Using Strings

4.4 Nested Iteration

Unit 4 Overview: Iteration

What is Iteration?

Introduction to While Loops

Possible Issues With Loops

While Loop Structures

Making Sure Your Loop Works: The Four Loopy Questions

Break and Continue

Try-Catch Statements and Exception Handling

Algorithms Using While Loops

While Loops

Introduction to For Loops

Example: Fibonacci Numbers

For Loops

Reversing a String

Get All Substrings of Length N

Check for a Substring

Count Substrings Satisfying a Criteria

Developing Algorithms Using Strings

Example: Printing a Triangle

Example: Printing a Number Triangle

Example: Break in Nested Loops

Example: Continue in Nested Loops

Nested Iteration

Tracing

Informal Code Analysis

Unit 4 – Iteration

5.1 Anatomy of a Class

5.2 Constructors

5.3 Documentation with Comments

5.4 Accessor Methods

5.5 Mutator Methods

5.6 Writing Methods

5.7 Static Variables and Methods

5.8 Scope and Access

5.9 "this" Keyword

5.10 Ethical and Social Implications of Computing Systems

Unit 5 Overview: Writing Classes

Class Writing Practice Problems

Anatomy of a Class

Impacts

System Reliability

Intellectual Property

Ethical and Social Implications of Computing Systems

The Student Class

The Assignment Class

Constructors

Types of Comments and Their Uses

Commenting our Two Classes

Documentation With Comments

Introduction to Accessor Methods

Writing Accessor Methods for Our Two Classes

Return Expressions

Accessor Methods

Introduction to Mutator Methods

Writing Mutator Methods for the Student Class

Using Mutator Methods

Mutator Methods

Writing Methods

Introduction to Static Variables and Methods

Adding Static Variables and Methods

Using Static Methods and Variables

Static Variables and Methods

Scope

Access

Example

Scope and Access

Introduction to This

Finishing Our Classes

This Keyword

Unit 5 – Writing Classes

6.1: Array Creation and Access

The Big Takeaway of this Unit

Exam Weighting

Enduring Understanding

Building Computational Thinking

Main Ideas for this Unit

6.1 Array Creation and Access

6.2 Traversing Arrays

6.3 Enhanced For Loop for Arrays

6.4 Developing Algorithms Using Arrays

Unit 6 Overview: Array

Introduction to Arrays

Making Arrays

Accessing Elements in Arrays

Array Creation and Access

What is Traversing?

Examples

Traversing Arrays

Structure for Enhanced 'For Loops'

Limitations of Enhanced 'For Loops'

Enhanced For Loop For Arrays

Unit 6 – Array

🌶️ AP Comp Sci A Cram Review: Unit 2: Using Objects

🌶️ AP Comp Sci A Cram Review: Unit 2: Using Objects

AP Computer Science A 💻

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