• Asking for Help
• Toy Problems
• Lies

• Comments
• Semicolons
• Formatting
• Challenges

• Naming
• Reassignment
• Delayed Assignment
• Types
• Final Variables
• Inferred Types
• Challenges

• And
• Or
• Not
• Operator Precedence
• Challenges

• Integer Literals
• Addition
• Subtraction
• Multiplication
• Division
• Remainder
• Equality
• Comparison
• Chained Comparisons
• Operator Precedence
• Reassignment
• Shorthands for Reassignment
• Limits
• Challenges

• Floating Point Literals
• Accuracy
• Addition
• Subtraction
• Multiplication
• Division
• Equality
• Comparison
• Shorthands for Reassignment
• NaN
• Positive and Negative Infinity
• Square Root
• Conversion to Integers
• Conversion from Integers
• Challenges

• Character Literals
• Common Escape Sequences
• Conversion to Integers
• Conversion from Integers
• Unicode
• Challenges

• String Literals
• Common Escape Sequences
• The Empty String
• Multiline String Literals
• Concatenation
• Equality
• Length
• Access Individual Characters
• Challenges

Branching Paths

• If
• Nested Ifs
• Else
• Else
• Else If
• Relation to Delayed Assignment
• Scoped Variables
• Scoped Variables
• Conditional Operator
• Boolean Expressions
• Challenges

Loops

• While
• Endless Loops
• Break
• Continue
• Unreachable Code
• Do While
• Nested Loops
• Labeled Break
• Labeled Continue
• Iteration
• Counting Up
• Counting Down
• Iterate over a String
• Challenges

• Array Initializers
• Length
• Access Individual Elements
• Set Individual Elements
• Aliasing
• Reassignment
• Relation to Final Variables
• Printing the Contents of an Array
• Empty Array
• Difference between Initializer and Literal
• Challenges

• For
• For Syntax
• Counting Up and Down
• Iterate over a String
• Iterate over an Array
• Comparison to while
• i
• Break
• Continue
• Delayed Assignment
• Inferred Types
• Empty Initializers
• Empty Expressions
• Empty Statements
• Final Variables
• Labeled Break
• Labeled Continue
• Drawing Right Triangles
• Drawing Isosceles Triangles
• Challenges

Methods

• Declaration
• Invocation
• Scope
• main
• Challenges

Arguments

• Declaration
• Invocation with Arguments
• Reassignment
• Final Arguments
• Aliasing
• Overloading
• Inferred Types
• Challenges

Return Values

• Declaration
• Return Statement
• Exhaustiveness
• void
• Return in void methods
• Conversion
• Unreachable Statements

• Null as Absence
• Null as Unknown
• Checking for null
• NullPointerException

• Integer
• Double
• Character
• Boolean
• Unboxing Conversion
• Boxing Conversion
• Arrays of Boxed Primitives
• Challenges
• Challenges

• Initializion with Size
• Default Values
• Populate Arrays

Classes

• The meaning of the word Class
• Class Declaration
• Naming
• Instances
• Fields
• Field Initialization
• Field Access
• Field Default Values
• Aliasing
• Return Multiple Values

Instance Methods

• Invocation
• Arguments
• Field Access
• Field Updates
• Derived Values
• Invoke Other Methods
• this
• Disambiguation
• Clarity

• Declaration
• Variants
• Naming
• Usage
• Equality
• Comparison to boolean

• throw
• Messages
• Stack Traces
• try/catch

• Case and Default
• Strings
• ints
• Enums
• Omitted Default
• Exhaustiveness
• Combining Cases
• null

• Declaration
• The Default Constructor
• Arguments
• Final Fields
• Invariants
• Overloads
• Delegation