colleen lewis

Java NM - Example 9: Two variables can reference the same object and both of them can modify it

Java NM: Example 6: An array passed to a method can be modified within that method

Java NM - Example 10: The variable this is created when we call a method on an object

Exceptions in Java List/List Node class

Java HashSet - How does HashSet use hashCode and equals?

Java NM - Example 4: Null reference

Using IF with Variables: Programming in Scratch 2.0

Java Arrays 4: Modify an int array referenced by two variables

Java Strings: Default values for String variables and String arrays

CS Awesome: Vocabulary (Class, Object/Instance, Attributes/Instance Variables, Behavior/Methods)

CS60 - Running JUnit Tests in Eclipse

Java NM - Example 7: Calling a constructor makes an object

Creating empty Lists using List/ListNode classes

APCSA - Unit 2a - Annotated Anchor Code

Using Java Generics in List/ListNode and writing constructors that call other constructors

Preview - Unit 2b APCSA - Annotated Anchor Code

3D Java - Make a double

Playing Scales With and Without Variables: Programming in Scratch 2.0

Java explanations - Overview (

Unit 2-String Alias: In an assignment statement, we always copy the value in the variable-Java APCSA

Java NM - Example 3: A variable can hold a reference to an int array.

Java Objects 7: Checking if two objects are == (equal-equal)

Changing Variables in Multiple IF statements: Programming in Scratch 2.0

3D Java - Make a boolean

3D Java - Make an int

Unit 2 - Dog Alias: In an assignment statement, we always copy the value in the variable(Java APCSA)

Review of Java HashSet Properties

Part 2: Method Execution - No Inheritance (Java Inheritance)

Unit 1 - Casting: We convert/cast btwn types int/double by putting the new type in parentheses-APCSA

APCSA - Binary Search Algorithm

Preview - Unit 2a APCSA - Annotated Anchor Code

Java Inheritance: Introduction

Java For Loop and While Loop Flow Charts

Unit 2 - Null: If we don’t give a reference variable a value, it will be null (Java APCSA)

Unit 2 - Constructor: Calling a constructor makes a new object (Java APCSA)

3D Java - Make a reference variable

APCSA - Quicksort Algorithm In-Place vs. Merge Sort (Part 2 of 3)

APCSA - Quicksort Algorithm Performance (Part 3 of 3)

Part 9: Compilation Rules for Methods (Java Inheritance)

Part 1: Variable Type vs Object Type (Java Inheritance)

Java HashSet Open Addressing Algorithm - 3D Representation

5 reasons 3D Java models help students learn

Part 8: Motivation for Polymorphism (Java Inheritance)

APCSA - Quicksort Algorithm (Part 1 of 3)

HashSet Diagrams Explanation - Chaining & Open Addressing Algorithms

Part 10: Casting (Java Inheritance)

Broadcast vs. Broadcast and Wait: Programming in Scratch 2.0

Unit 1 - Types: Variables can hold different types

Java NM: Example 11: An object contains the values of each of the instance variables in the class

Java NM - Example 9: Two variables can reference the same object and both of them can modify it

Teaching Java Inheritance with Physical Models