Inheritance & Polymorphism, Introduction to Java

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Inheritance & Polymorphism

Inheritance allows one class to extend another class
The class doing the extending is called the subclass
The class being extended is called the superclass
A subclass can override methods it inherits from its superclass
An abstract class can be extended but cannot be directly instantiated
Polymorphism ensures that the correct method is called for an object disguised as a more generic type
An interface only contains headings for methods; a class implements an interface

Inheritance & Polymorphism

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

I. AP Computer Science
	About the AP Computer Science Exam	17:11
	Types, Variables, & Arithmetic Operators	23:20
	Equality, Relational, & Logical Operators	22:34
	Input, Output, & Errors	24:07
	Conditional Statements	28:00
	Loops	32:29
	Strings	42:20
	Arrays	47:02
	Classes & Objects	47:33
	Inheritance & Polymorphism	31:30
	Lists	33:15
	Numeric Wrapper Classes & Mathematical Functions	23:14
	Algorithms: Iteration	25:43
	Algorithms: Recursion	27:30
	Algorithms: Sorting	29:42
	Algorithms: Searching	32:37
	Program Design & Development	29:29
	Standard Classes & Interfaces	32:53
II. AP Test Preparation
	Multiple Choice Question Tips & Practice	55:47
	Free Response Question Tips & Practice	40:55
	The GridWorld Study	54:18
	Multiple Choice Questions About GridWorld	41:00
	Free Response Questions About GridWorld	39:31
	Final Tips for Taking the Exam	27:38
	Glossary of Terms to Know	36:31

AP Computer Science: Introduction to Java

I. AP Computer Science
	About the AP Computer Science Exam			17:11
		Intro		0:00
		Roadmap		0:16
			Java Editor	0:45
		The AP Computer Science Exam		1:30
			When It's Administered	1:31
			Final Score	1:49
			College Credit	2:08
		Format of AP Exam Questions		2:20
			Two Sections	2:26
			Section 1	2:31
			Section 2	2:40
			Scoring	3:23
		Multiple Choice Questions		3:57
			Example	4:04
			Check Answer in Java Editor	5:06
			Keep in Mind	6:21
		Multiple Choice, Multiple Answers		6:58
			Evaluate Each Roman Numeral Separately	7:08
			Example Multiple Choice Question	7:34
			Java Editor	8:35
		Free Response Questions		12:25
			Example	12:40
			Java Editor	14:35
		AP Java Subset		17:06
			What It Is	17:37
			Primitive Types	18:49
			Arithmetic Operators	19:11
			Assignment Operator	19:46
			Combined Arithmetic / Assignment Operators	19:51
			Increment / Decrement Operators	20:13
			Relational Operators	20:36
			Logical Operators	21:06
			Numeric Casts	21:44
			Numeric Wrapper Classes	22:39
			Math Library Methods	23:08
			String Operations	23:50
			User Input	25:33
			Output	27:17
			Program Invocation	28:13
			Arrays	29:06
			Lists	29:52
			Control Structures	30:47
			Methods	31:27
			Classes	32:10
			Inheritance	33:09
			Exceptions	34:22
		Tips for Taking the Exam		34:55
			Before the Exam	35:04
			During the Exam	36:58
		Summary		39:27
	Types, Variables, & Arithmetic Operators			23:20
		Intro		0:00
		Roadmap		0:11
		Primitive Data Types		0:37
			Int	1:48
			Double	2:42
			Boolean	3:53
		Variables		4:04
			Declaring a Variable	4:16
			Assigning a Value	6:01
			Declaring and Assigning on the Same Line	6:36
		Casting		7:00
			Mixing Types	7:10
			Automatic Casting	8:31
		Find Variables - Constants		9:21
			Final Variables	9:40
			Constants Written in All Capitals	10:43
		Arithmetic Operators		11:59
			Five Arithmetic Operators	12:10
			Result Depends on Type of Operands	13:49
		Assignment Operators		14:59
			Compound Assignment Operators	15:13
			Examples	15:43
		Increment / Decrement Operators		17:08
			Add 1 (++)	17:37
			Subtracts 1 (--)	18:25
		Summary		21:41
	Equality, Relational, & Logical Operators			22:34
		Intro		0:00
		Roadmap		0:11
		Equality and Relational Operators		1:09
			Equal to	1:15
			Not Equal to	2:25
			Relational Operators	2:40
		Logical Operators		3:44
			Three Operators: And, Or, Not	3:53
			AND Defined	4:18
			OR Defined	4:50
			NOT Defined	5:19
			Example: And	5:43
			Example: Or	6:23
			Example: Not	6:41
		Truth Tables		7:16
			Truth Tables for AND	7:30
			Truth Tables for OR	8:05
			Truth Tables for NOT	8:47
		Short-Circuit Evaluation		10:03
			Example	10:32
			This Behavior Can be Useful in Program Design	12:29
		De Morgan's Laws		13:53
			First Law	14:04
			Second Law	14:29
		Operator Precedence		15:28
			List of Operators in Highest to Lowest Precedence	15:38
			Evaluation on Operators	17:30
		Summary		20:26
	Input, Output, & Errors			24:07
		Intro		0:00
		Roadmap		0:11
		Getting Input from the User		0:42
			For AP Questions, Will Look Like One of the Following	0:54
			One Method of Getting Input From the User	2:50
			Scanner Class	3:20
		Providing Output to the User		4:38
			Only 2 Included in AP Subset	5:06
			Example: Print Two Strings on the Same Line	5:45
			Example: Print a String and an Integer	6:16
			Example: Print a Blank Line	6:40
			Java Code Example	7:04
		Escape Sequences		11:10
			Backslash Character Followed by One or More Additional Characters	11:23
			Newline Character	11:49
			Double Quote Character	12:39
			Backslash Character	13:48
			Java Code Examples: Printing Escape Sequences	14:43
		Exception Handling		16:25
			Describe As	16:33
			Exceptions Within the AP Subset That Provides Structured Way to Handle Errors	17:18
			Java Code Example	19:40
		Summary		22:21
	Conditional Statements			28:00
		Intro		0:00
		Roadmap		0:09
		Conditional Statements		0:55
			Based on Value of a Boolean Expression	1:40
			Switch Statement	2:42
		The If Statement		2:59
			Structure of If Statement	3:06
		The If-Else Statement		4:46
		The If-Else Statement		6:02
			If expression - False	6:34
		Nested If-Else Statements		7:13
			'Nest'	7:28
		Nested If-Else Statements		7:56
			First Thing to Determine	9:28
			Code	10:24
		The Extended If Statement		13:14
			Code	15:45
		The Switch Statement		18:54
			The Way It Works	19:37
			Example: Switch Statement in a Java Program	22:44
		Summary		27:03
	Loops			32:29
		Intro		0:00
		Roadmap		0:07
		Repeating an Action		0:53
			Example	1:03
		Repeating an Action		1:21
			Use Brute Force Method	1:32
		The While Loop		2:16
			To Repeat An Action	2:55
			Example: While Loop	4:57
		The Do Loop		5:53
			Example: Do Loop	8:00
			Distinction of Do Loop & While Loop	9:04
		The For Loop		10:30
			The Way It Works	10:41
			Example: The For Loop	12:43
		The Enhanced for Loop		14:18
			The Way It Works	14:42
			Example:Enhanced for Loop	16:32
		Nested While Loops		19:06
			Example	19:33
			Example: Nested While Loop (Code)	20:47
		Nested For Loops		22:36
			Example	22:51
			Example: Nested For Loop (Code)	23:29
		The Return Statement		24:30
			Example	25:03
		The Break Statement		26:21
		The Continue Statement		28:01
		Summary		30:56
	Strings			42:20
		Intro		0:00
		Roadmap		0:25
		Literal Strings		1:27
			Class: Strings	1:38
			String Is Immutable	2:11
			Example	2:53
			Literal Strings	3:27
			String Variables	4:24
			Example: String Variable	5:56
		String Concatenation		7:03
			Example	7:37
			Example: String Concatenation	8:26
		String Concatenation		10:00
			Assignment Operator	10:11
			Example	10:48
			Example: String Concatenation	11:25
		String Length		13:05
			Example: String Length	14:16
		String Comparison		16:04
			Equals Method	16:37
			Example: String Comparison	17:08
		String Comparison		21:40
			String.Equals: Case-Sensitive	21:49
			Equals Ignore Case: Case-Insensitive	22:14
			Example: Case-Sensitive and Case-Insensitive Comparison	22:46
		String Comparison		25:38
			Compare To (String.compareTo)	25:53
			Example	27:27
			Example: Sting Comparison Using the compareTo Method	28:15
		Taking a Subset of a String		30:34
			Substring Method	30:59
			2 Versions	31:08
			1st Version: Takes One Parameter	31:27
			2nd Version: Takes Two Parameters	32:41
			Example: Substring	34:02
		Searching Within a String		36:04
			indexOf Method	36:12
			1st Version: Takes One Parameter	36:26
			2nd Version: Takes Two Parameters	37:27
		Searching Within a String		38:36
			lastIndexOf Method	38:53
			1st Version: Takes One Parameter	39:08
			2nd Version: Takes Two Parameters	39:28
		Summary		40:43
	Arrays			47:02
		Intro		0:00
		Roadmap		0:14
		Declaring and Creating an Array		0:49
			Array Defined	0:55
			1st Way to Declare and Create and Array	1:10
			2nd Way to Declare and Create and Array	2:15
		Referring to Elements in an Array		5:12
			Integer Expression	5:39
			Code Example: Declaring and Creating Arrays	7:26
		Referring to Elements in an Array		9:12
			Example	9:45
			Code Example: Looping Through an Array of Ints	12:23
		Referring to Elements in an Array		15:35
			Enhanced for Loop	15:42
			Code Example: Looping Through an Array of Strings With an Enhanced for Loop	17:19
		Referring to Elements in an Array		19:25
			ArrayIndexOutOfBoundsException	19:37
			Code Example: Array Index Out of Bounds Exception	21:03
		Resizing Arrays		23:05
			Example	23:33
			Code Example: Resizing Arrays	25:15
		Copying Arrays		28:13
		Passing an Array to a Method		30:09
			Example	30:15
			When Calling This Method: Pass in an Array	33:40
			Code Example: Passing an Array to a Method	34:06
		Returning an Array From a Method		36:02
			Create a Method	36:12
			Calling This Method	38:42
			Code Example: Returning an Array to a Method	39:24
		Two-Dimensional Arrays		42:23
			Length Method	43:17
			Number of Columns	43:42
		Summary		45:00
	Classes & Objects			47:33
		Intro		0:00
		Roadmap		0:46
		Classes and Objects		2:03
			Class	2:17
			Object	2:34
		Constructors		3:43
		Constructors		5:34
		Methods		7:11
			Example: getName Method	7:44
		Methods		8:45
			Example	9:08
			Example in Java Program	10:19
		Data Fields		12:48
			Way to Find Data Fields	13:10
		Data Fields		13:50
			Example: Instantiate Two Objects with Different Instance Data	14:43
		Return Type		16:21
			A Primitive Type	16:37
			An Object of a Class Type	16:49
		Return Type		17:25
		Access Control		18:19
			Public, Protected and Private	19:31
			Assumptions Made in AP Java Subset	20:00
		Access Control		20:58
			Definition of Public	21:08
			Definition of Protected	21:18
			Definition of Private	21:28
			Guidelines on What to Make Public/ Private	21:36
		Accessors and Modifiers		24:47
			Accessor	25:35
			Modifier or Mutator	26:24
		Static vs. Instance		27:15
			Static Member	27:26
		Example: Static vs. Instance		27:59
			Code Example	30:19
		Passing Data to Method		34:00
			Code Example	36:17
		Getting Data Back From Methods		37:28
			To Make Use of a Return Value	37:53
			Code Example	38:51
		Overloaded Methods		39:39
			Signature Includes	40:19
			Signature Does Not Include	40:45
		Example: Overloaded Methods		43:52
		Overloaded Methods		44:19
		Summary		45:00
	Inheritance & Polymorphism			31:30
		Intro		0:00
		Roadmap		0:42
		Inheritance		1:14
			Subclass	1:56
			Superclass	2:07
		Inheritance		3:08
			Example	3:36
		Inheritance		4:44
			Subclass Does Not Inherit…	6:05
		Inheritance		7:06
			To Override a Method	7:17
		Inheritance		8:59
			Example	10:24
		Class Hierarchies		11:31
			Multiple Level Hierarchies for Subclass	12:41
		Abstract Classes		14:35
			Example	15:59
		Polymorphism		20:19
			Example	20:34
		Interfaces		22:33
		Interfaces Example		25:13
			Defines 3 Methods	25:27
		Summary		29:26
	Lists			33:15
		Intro		0:00
		Roadmap		0:16
		Lists		0:52
			Wrapper Classes	1:10
		The List Interface		2:37
			Cannot Instantiate a List	3:26
		The ArrayList Class		5:01
			The Way It Works	7:45
		The ArrayList Class		8:34
			Primary Methods Needed To Use for ArraryList	8:53
			Code Examples	16:26
		The LinkedList Class		21:01
			To Instantiate a LinkedList…	21:59
			Code Example	24:05
		ArrayList vs. LinkedList		25:25
			Internal Storage Implementation of ArrayList	25:35
			Internal Storage Implementation of LinkedList	26:01
			Pros/Cons of Each	26:23
		Summary		32:10
	Numeric Wrapper Classes & Mathematical Functions			23:14
		Intro		0:00
		Roadmap		0:11
		Numeric Wrapper Classes		0:42
			To Get Around Storing Limitation	1:19
		Setting and Getting Values		2:30
			Double Class	3:57
		Comparing Values		5:07
			Equals Method	5:22
		Comparing Values		7:16
			CompareTo Method: Integer Class	7:29
			CompareTo Method: Double Class	9:24
		Minimum and Maximum Values		10:28
			Integer Class: Publib Static Final	10:56
			Double Class	12:19
		Automatic Conversion		12:53
			Autoboxing	13:12
			Example	13:36
			Get Method	14:52
		The Math Class		15:59
			Math.E	16:18
			Math.PI	16:25
			Example	16:34
		The Math Class		17:07
		Working With Random Numbers		18:42
			Example	19:47
		Summary		22:14
	Algorithms: Iteration			25:43
		Intro		0:00
		Roadmap		0:13
		Iteration		0:36
			Iteration Defined	0:39
			For Loop / While Loop	0:50
			Example	1:11
		Iteration		3:11
			Two-Dimensional Range	3:19
			Using Two Nested While Loops	5:00
		Finding Minimum and Maximum Values		5:54
		Finding Minimum and Maximum Values Examples		7:50
		Finding Minimum and Maximum Values Example		12:52
		Inserting in Order		15:19
		Inserting in Order Code		17:42
		Loop Invariants		21:53
			Example	23:17
		Summary		24:37
	Algorithms: Recursion			27:30
		Intro		0:00
		Roadmap		0:09
		Recursion		0:44
		Calculating Factorials		2:49
			n! and How It's Defined	3:01
			Recursive Implementation of the Factorial Function in Java	3:34
		Calculating Factorials		4:34
			Calculate 4!	4:35
			Factorial Function in Java	7:22
		Calculating Fibonacci Numbers		9:19
			Fibonacci Numbers Defined	9:30
			Recursive Implementation	10:33
			Implementation in Java	10:44
		Calculating Fibonacci Numbers		11:28
			Calculate Fibonacci(4)	11:29
			Fibonacci in Java	14:59
		Other Recursive Functions		17:35
		Other Recursive Functions		21:32
			Calculate Mystery(4)	21:33
			Mystery in Java	22:29
		Important Considerations		23:49
			Recursive Methods	25:15
		Summary		26:41
	Algorithms: Sorting			29:42
		Intro		0:00
		Roadmap		0:08
		Sorting		0:55
			Definition of Sorting	1:05
			Cant Sort Any of the Following	1:14
		Selection Sort		3:49
			Definition of Selection Sort	3:58
			'Search-and-Swap' Algorithm	5:05
		Selection Sort Example		7:46
		Insertion Sort		10:57
		Insertion Sort Example		13:02
		Merge Sort		15:14
			Recursive Sorting Algorithm	16:15
		Merge Sort Example		18:03
		Quick Sort		20:34
			Recursive Sorting Algorithm	21:36
		Quick Sort Example		23:35
		Summary		27:19
	Algorithms: Searching			32:37
		Intro		0:00
		Roadmap		0:08
		Searching		0:40
		Sequential Search		2:22
			Performed on Any Array	2:29
		Sequential Search Algorithm Using a For Loop		4:24
			Java Example	6:28
		Binary Search		8:51
		Binary Search Algorithm Using a While Loop		12:03
			Java Example	16:59
		Binary Search		20:38
			Recursive Method	20:53
			Java Example: Using Binary Search	25:34
		Search Considerations		28:16
			Binary Search	29:14
		Summary		31:14
	Program Design & Development			29:29
		Intro		0:00
		Roadmap		0:41
		Object-Oriented Programming		1:20
			Definition	1:35
			Encapsulation	2:26
			Polymorphism	4:43
		Top-Down Design and Development		5:56
			Top-Down Design	6:10
			Top-Down Development	6:51
		Reusable Code		8:47
			Definition	8:58
			Example to Reusable Code	10:33
		Team Development		11:36
		Team Development		15:03
			Adding Another Developer	15:23
		Data Structure		19:28
			Definition	19:35
			Examples	19:44
		User Interface		20:53
			Definition	21:00
		Specifications		24:19
			Definition	24:29
			2 Important Purposes for Specifications	25:25
		Summary		27:27
	Standard Classes & Interfaces			32:53
		Intro		0:00
		Roadmap		0:13
		Object		1:46
			Methods	1:57
			Equals Method	2:06
			toString Method	2:16
			What Else To Know	2:28
		Integer		3:19
			Constructor	3:32
			Methods	3:51
			Constants	4:28
			What Else To Know	5:05
		Double		6:14
			Constructor	6:35
			Methods	6:50
			What Else To Know	7:06
		String		8:16
			Methods	8:40
			What Else To Know	12:10
		Math		15:24
			Methods	15:36
			What Else To Know	18:13
		List		20:02
			Methods	20:30
		ArrayList		22:45
			What Else To Know	23:27
		Test-Taking Tips		26:05
		Summary		29:47
II. AP Test Preparation
	Multiple Choice Question Tips & Practice			55:47
		Intro		0:00
		Roadmap		0:23
		AP Computer Science Exam Structure		1:32
			Two Sections	1:40
			Contribution to Score	3:35
		Multiple Choice Strategies and Tips		4:50
		Example Question 1		9:07
		Example Question 2		13:34
		Example Question 3		16:12
		Example Question 4		21:44
		Example Question 5		26:41
		Example Question 6		34:12
		Example Question 7		39:41
		Example Question 8		42:09
		Example Question 9		46:31
		Example Question 10		50:35
		Summary		54:49
	Free Response Question Tips & Practice			40:55
		Intro		0:00
		Roadmap		0:27
		AP Computer Science Exam Structure		1:15
			Two Sections	1:20
			Contribution to Score	2:09
		Free Response Strategies and Tips		3:23
		Free Response Strategies and Tips Continued		6:17
		Free Response Strategies and Tips Continued		10:22
		Free Response Strategies and Tips Continued		13:00
		Free Response Strategies and Tips Continued		15:42
		Example Free Response Question		17:41
			Example Free Response Question Narrative Continued	18:30
			Example for Problem	19:29
			Example Set-Up for Problem	19:56
			Example Set-Up for Problem Continued	21:48
			Code	24:14
			Code Continued: First Method	25:36
			Second Method	26:28
			Additional Narrative	27:04
			Definition of Part A: What They Want You to Write	27:33
			Definition of Part B: What They Want You to Write	28:50
			Requirements for Part A	31:06
			Part A: One Possible Solution	31:49
			Requirements for Part B	34:06
			Part B: One Possible Solution	34:48
		Summary		39:52
	The GridWorld Study			54:18
		Intro		0:00
		Roadmap		0:19
		Overview of GridWorld		0:51
			Definition of GridWorld	1:00
			Important part of AP Exam	3:14
			Need to Understand It	5:16
		Overview of GridWorld: Testable APIs		8:00
			API Defined	8:06
			Testable APIs	8:52
		Testable Code		9:22
			4 Classes	9:57
		Location Class		10:21
		Location Class: 8 Public Constants That Help with Direction		11:36
			Row Numbering	12:32
			Column Numbering	13:13
		Location Class: 7 Public Constants That Represent Turns		13:31
		Location Class: Methods Useful in Navigating Through the Grid		15:25
			getAdjacentLocation	15:34
			getDirectionToward	16:21
		Location Class: 3 Other Useful Methods		16:58
			Equals Method	17:05
			CompareTo Method	17:35
			ToString Method	18:16
		Grid Interface		18:41
			Represents	18:50
		Grid Interface: Useful Methods		20:34
			getNumRows Method	20:42
			getNumCols Method	20:52
			isValid Method	21:00
		Grid Interface: Useful Methods		22:16
			Put Method	22:23
			Remove Method	22:13
			Get Method	23:26
		Grid Interface: Useful Methods		23:44
			GetOccupiedLocations Method	23:55
			GetValidAdjacentLocations Method	24:21
			GetEmptyAdjacentLocations Method	25:02
			GetOccupiedAdjacentLocations Method	25:24
		Grid Interface: Useful Methods		25:37
			GetNeighbors Method	25:44
		Actor Class		26:27
			Constuctor: Actor	27:02
			GetColor Method	27:31
			SetColor Method	27:38
			GetDirectionToward Method	27:46
			SetDirection Method	28:09
			GetGrid Method	28:27
			GetLocation Method	28:40
			PutSelfInGrid and RemoveSelfFromGrid Method	28:51
			MoveTo Method	30:03
			Act Method	30:17
			ToString Method	31:24
		Rock Class		31:46
			3 Methods	31:58
		Flower Class		32:35
			3 Methods	32:51
		Bug Class		33:53
			Includes These Methods	34:34
			How the Move Method Works	36:38
			CanMove Method	38:53
		BoxBug Class		40:49
			Behavior	41:00
			2 Private Variables	41:20
			Constructor for BoxBug	41:55
		BoxBug Class Methods		42:16
		Critter Class		43:41
			How It Works	44:03
			Next Step	45:38
			3rd Step	47:01
			Last Step in Act Method	48:33
		ChameleonCritter Class		49:00
			Redefines Some Characteristics of Critter Class	49:26
			Another Difference	51:02
		Summary		52:25
	Multiple Choice Questions About GridWorld			41:00
		Intro		0:00
		Roadmap		0:16
		Multiple Choice Strategies and Tips		0:45
			Structure	0:49
			Points Worth	1:47
		Some Strategies and Tips		3:29
			No Penalty for Wrong Answer	6:10
		Some Strategies and Tips Specifically on GridWorld Questions		6:29
		Some Strategies and Tips Specifically on GridWorld Questions		9:37
		GridWorld Testable APIs and Code		13:17
			Testable APIs	13:25
			Testable Code	13:47
		Example Question 1		14:32
		Example Question 2		17:11
		Example Question 3		22:53
		Example Question 4		26:17
		Example Question 5		34:11
		Summary		39:47
	Free Response Questions About GridWorld			39:31
		Intro		0:00
		Roadmap		0:14
		Free Response Strategies and Tips		0:49
			Format	0:56
			Points	1:18
			Quick Reference Guide	1:49
			Not Required to Do in Order	2:48
			Multiple Parts	3:33
			All Answers Must Be Written in Java	5:00
			Partially Correct Solutions Can Be Awarded Partial Credit	7:49
			Write Neatly	10:40
			Don't Waste Time	12:52
		GridWorld Testable APIs and Code		14:55
			Testable APIs	15:05
			Testable Code	15:53
		GridWorld Testable APIs and Code		16:37
			GridWorld Free Response Question	16:41
			Example	17:34
		Example Free Response Question		18:23
			Question	18:54
			Visual Diagram of the Game Board	20:00
			Visual Chart	21:08
			Narration Continues	21:56
			The Piece Class	22:59
			Narration Continues	23:59
			What You Will Need to Do	24:28
			The Rest of the Definition for DropGame	25:08
			Part A: Requirements	25:55
			Part B: Requirements	28:44
			Part A: Question (Again)	31:54
			Part A: One Possible Solution	32:19
			Part B: Question (Again)	35:30
			Part B: One Possible Solution	35:47
			Summary	38:34
	Final Tips for Taking the Exam			27:38
		Intro		0:00
		Roadmap		0:10
		AP Computer Science Exam Structure		0:46
			Two Sections	0:49
			Scoring	1:24
		Multiple Choice Strategies and Tips		2:15
			Answer Questions for Descriptive Paragraph First	2:38
			No Penalty for Wrong Answer	3:42
		Free Response Strategies and Tips		4:00
			Each Part Graded Separately	4:57
			All Answers Written in Java	5:54
			Partially Correct Solutions	8:32
			Write Neatly	10:33
			Draw a Single Line Through Mess-Ups	13:09
		Additional Resources		14:49
			Download the Project Files for GridWorld	15:20
			Download Reference Documents	15:39
			Remember, You Can Watch This Lesson More Than Once	15:54
		What to Bring to Your Exam		16:19
		What Not to Bring to Your Exam		18:47
		The Night Before Your Exam		22:00
		The Day of Your Exam		24:23
		Summary		26:44
	Glossary of Terms to Know			36:31
		Intro		0:00
		Roadmap		0:16
		Abstract Class		1:28
		Array		2:29
		Casting		3:43
		Class		4:39
		Conditional Statement		5:35
		Constructor		6:28
		Escape Sequence		7:18
		Exception		8:24
		Final Variable		8:59
		Inheritance		10:19
		Instance		11:36
		Interface		12:33
		Iteration		13:08
		List		14:05
		Logical Operator		15:11
		Loop		16:20
		Loop Invariant		17:06
		Method		17:30
		Numeric Wrapper Class		18:55
		Overloading		20:38
		Polymorphism		21:10
		Primitive Data Type		23:22
		Public and Private		24:06
		Random		25:03
		Recursion		27:07
		Return Type		28:08
		Searching		28:59
		Signature		30:14
		Sorting		30:51
		Static		32:40
		String		33:37
		Subclass and Superclass		34:30
		Glossary		35:37

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Inheritance & Polymorphism

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Features Overview

Inheritance & Polymorphism

Inheritance & Polymorphism

AP Computer Science: Introduction to Java

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