Java Beginner

                                             

Java Notes: Table of Contents

Java Notes. These Java programming notes are written to fill in missing or weak topics in textbooks that I've taught from. Many pages are useful for reference, but not as an ordered tutorial. Some pages are still rough drafts, but I'm slowly working on fixing them. notes-java-2007-04-25.zip [2.4 MB]. Java Basics. I've started writing a more coherent tutorial called Java Basics. In addition to lessons, there is also commentary which explains why things are done the way they are. JavaBasics-2007-04-25.zip [0.4 MB].

Copyleft - Java Notes is copyrighted by the very permissive MIT License, except as otherwise noted (eg, some GPL'ed images). Copyright - Java Basics, which has more work put into it, has a traditional copyright, but allows free educational use. Public Domain - All source code in the examples in both Java Notes and Java Basics is placed in the public domain so you can use them.     Enjoy, Fred Swartz

Background Preface Programs Files and Directories CLASSPATH Directories and Files Packages - Importing Packages - Defining Using other packages NoSuchMethodError main Garbage Collection Links My Favorite Books Java Tools Tools Java Development Kit Programming IDEs NetBeans NetBeans GUI Projects NetBeans Code Snippets Text Editors TextPad Editor Ant Checkers Deployment Applications, Applets, etc. Intro GUI - Swing vs. AWT Strengths Weaknesses History of Java Java Virtual Machine Java vs. C Applications - example Compiling a Java program Applets Principles and practices Style Coding guidelines - summary <!-- Readability Names

Cohesion

Design By Contract

Process - Iterative

• Development Process
• Iterative/Incremental Dev
• Start with working pgm

Errors and debugging

• Fail Early, Fail Often
• Error Processing
• Debugging Output

OO Design

• Frameworks

Complexity

• Complexity is your enemy
• Complexity Measurement
• Method Cyclomatic Complexity

Function Point Analysis

• FPA Introduction

Summaries

• Data summaries
  • Summary - Data
  • Summary - Expressions
  • Summary - String
  • Summary - Character
  • Summary - StringBuilder etc
  • Summary - Arrays 1
  • Summary - Arrays 2
• GUI summaries
  • Summary - GUI Components
  • Summary - GUI Containers
  • Summary - GUI Layouts 1
  • Summary - GUI Layouts 2
  • Summary - Graphics
• Misc summaries
  • Summary - Intro Programming
  • Summary - Basic Elements
  • Summary - Control Flow
  • Summary - Packages
  • Summary - Scanner
  • Summary - Math class
  • Summary - Random numbers
  • DOS Commands

Introductory Example Programs

• Overview of Intro Programs
• Do nothing!
  • First Program - Do Nothing
• Output only
  • Console: Hello Earthling
  • Dialog: Hello Earthling
• Input - Output
  • Example: Console: To your leader
  • Example: Dialog: To your leader
  • Example: Console: Capitalize
  • Example: Dialog: Capitalize
  • Ex: Console: Kilometers to Miles
  • Ex: Dialog: Kilometers to Miles
  • Ex: Dialog: Km to Miles - Format
• Loop (Input, Calculate, Output)
  • Example: Console: Adding Machine
  • Example: Console: Max, min, avg
  • Example: Dialog: Adding Machine
  • Example: Dialog: Longest Word
  • Example: Dialog: Bad Words
  • Programming Problems
    • Body Mass Index - Dialog
    • Count Words - Dialog
• Methods
  • Ex: Dialog: Km to Miles - Method
  • Ex: Dialog: Input Range Method
• Try...Catch
  • Ex: Dialog: Km to Miles - Try-Catch

Example GUI Programs

• Components
  • Example - ToUppercase
  • Example - CombineName
  • Example - Body Mass Index
  • Example - Sleepy Face
  • Example - Calculator
  • Example - Simple editor
  • Example - Roman numerals
• Graphics
  • Example - Drawing a Face
  • Example - BullseyeDemo
  • Example - Roll Dice
  • Example - ColorDisplay
  • Example - Circles
• Animation
  • Example - Bouncing Ball
  • TextClock
    • Example - Text Clock
    • Example - Text Clock 2
    • Example - Extend Clock
  • Example - Buffered Clock
• Mouse
  • Example - MouseTest
  • Example - DragDemo
  • Example - Card Demo
  • Example - PaintDemo
  • Example - Raise
• Games
  • Example - FreeCell
  • Example - Slide Puzzle
  • Example - Five-in-a-row
  • Example - Sudoku v3
• Collections
  • Example - WordFrequency

Language

• Basics
  • Comments
  • Identifier Names
  • import
  • Final

Control Flow

• If
  • if Statement - Overview
  • Else not Required
  • Braces are your friend
  • 'if' Statement - Indentation
  • 'if' Statement - if inside if
  • 'if' Statement - 'else if' style
• switch
  • switch Statement - Overview
  • switch Example - Random Insults
• Loops
  • Loops - Introduction
  • While Statement
  • For Statement
  • "Foreach" Statement
  • Ex: String reverse
• Assertions
  • Assertions
• Exceptions
  • Exceptions
  • Exception Usage
  • Exceptions - More
  • Throwing Exceptions
• Methods
  • See Java Basics
  • Methods - Example
  • Static methods
  • Example methods and loops

Classes

• See Java Basics
• Overview
  • OOP Terminology
• Constructors
  • Constructors
  • Constructors - super
  • Constructors - super example
  • Exercise: Constructor Chaining
• Interfaces
  • Interfaces
  • Example - Handyperson
• Reflection / Introspection
  • Class class
• Enums
  • Enums

IO

• File IO
  • java.io.File
  • File I/O - Text Files
  • Sys Independent Newline
  • BufferedReader/Writer
  • File Filters
  • javax.swing.filechooser.FileFilter
  • java.io.FileFilter
  • Examples
    • Example - FileTest
    • Example - ReadWords
    • Example - NanoEdit
    • Example - Recursive List
• Console (System.in / System.out)
  • Console I/O
  • Console-Dialog Comparison
• Dialog (JOptionPane)
  • Dialog Box Input Loop
• Internet
  • Read page from Web server
• Formatted Output
  • Formatted Output
• Properties and Preferences
  • Preferences
  • Properties
    • System Properties
• JDBC
  • Database Engines

Algorithms

• Big-Oh Notation
  • Big-Oh Notation
• Comparing
  • Comparators
• Copying
  • Deep vs Shallow Copies
  • clone()
• Searching
  • Search/Sort Overview
  • Collections Class
  • Linear search
  • Binary search
  • Recursive binary search
• Sorting
  • Selection Sort
  • Bubble Sorts
  • Sorting Arrays
• Random numbers
  • Random numbers - intro
  • Random numbers - API
  • Shuffling
• Math
  • Math and java.util.Random

Other

• Time
  • Various time classes
  • javax.swing.Timer
  • java.util.Calendar
• Sound
  • Beep
  • Audio
• Memory
  • OutOfMemoryError

Data

• Basic Types
  • Numbers
  • Integers
  • Floating-point
  • Characters
    • Unicode
    • Summary - Character
  • Boolean
  • Autoboxing
• Variables
  • Variables
  • Local/Instance/Class
  • Shadow variables are evil
  • Shadowing this
• Expressions
  • Expressions
  • Precedence
  • Assignment
    • Extended Assigment Ops
  • Comparison
    • Comparison Operators
    • ==, .equals(), and compareTo()
  • Bit operations
    • Bitwise operations
• Numbers
  • java.math.BigInteger
  • Example - Factorial
• Strings
  • String Overview
  • String Comparison
  • Summary pages
    • Summary - String
    • Summary - StringBuilder
  • Conversion
    • Converting Numbers to String
    • Converting Anything to String
    • Converting Strings to Numbers
  • Regular_expressions
    • Regular Expressions
    • String Regex Methods
    • Basic regex summary
    • Pattern and Matcher
    • Regex Language
    • Regex Examples
    • Full regex summary
  • StringTokenizer
    • java.util.StringTokenizer
    • Tokenizing Delimiters
    • TokenizeExpr.java
  • String Examples
    • Example - Display Extension
    • Example - Change Extension
    • Example - Count occurences
    • Example - Count vowels
    • Example - Palindrome test
    • Example - Replace word
    • Example - SortWords3.java
    • Example - Array to String
    • Example - String to "tokens"
• Arrays
  • Arrays
  • Array library methods
  • Examples
    • Example: Reverse an array
    • Example: Maximum of array
    • Example: Average of array
    • Examples: Sorting
  • Arrays - 2-dimensional
  • Arrays of arrays
  • Arrays - more
• Collections - Generic
  • Java Data Structures
  • Collections Overview
  • Collection Interface
  • Lists
    • ArrayList<E>
      • Example - Alphabetize
    • Vector<E>
    • Simple Linked Lists
  • Deques
    • ArrayDeque<E>
  • Sets
    • Set<E> interface
  • Maps
    • Map<K, V> interface
    • Map iteration
    • Example - WordFrequency
  • Iterators
    • Iterators
  • Other
    • Class or Interface
    • Generics
    • Alternative Data Structures
  • Exercises
    • Exercise - Unique Components
    • Exercise - State Capitals

GUI

• See Java Basics
• Basics
  • GUI Tips
  • GUI Structural Patterns
• Summaries
  • Summary - Basic Components
  • Summary - Containers
  • Summary - Layouts
• Events and Listeners
  • Events - Introduction
  • Listeners
  • Inner-class Listeners
  • Anonymous Listeners
  • Top-level Listeners
  • Action, AbstractAction
• Components
  • Components
  • Introduction to Components
  • Where to declare components
  • Intro to components
    • Buttons
    • Text
  • JLabel
  • Buttons
    • JButton
    • JButton Appearance
    • Buttons with Icons
  • Textfield
    • JTextField
  • Textarea
    • JTextArea
    • Example - JTextArea
  • Radio buttons
    • Radio Buttons
  • Checkboxes
    • JCheckBox
  • Sliders
    • Sliders
    • Change Listener
  • Combobox
    • JComboBox (uneditable)
  • Menus
    • JMenuBar, JMenu, ...
• Containers
  • Containers
  • Windows
    • JFrame - Window
    • JFrame Close Box
    • Window Size and Position
    • Content Panes
  • Dialogs
    • Dialogs
    • JOptionPane - Simple
    • JOptionPane.showConfirmDialog
    • JFileChooser
    • FileFilter
  • Panels
    • JPanel - Container
    • JTabbedPane
• Layouts
  • Layouts
  • FlowLayout
  • BorderLayout
  • GridLayout
  • BoxLayout and Boxes
  • BoxLayout spacing
  • BoxLayout alignment
  • GridBagLayout
  • Example: GridBagLayout
  • Null Layout
  • Alternate Layout Managers
• GUI Program Structure
  • Big Blob Structure
  • UI-Model Structure
  • UI-Model Communication
• Misc
  • Cursor
  • GUI Alternatives

GUI - Appearance

• Fonts
  • Font class
  • FontMetrics
  • Centering Text
  • Example - FontDemo
• Borders
  • Borders
  • Border Example
• Look and Feel
  • Look and Feel

GUI - Low level

• Graphics
  • Summary: Graphics drawing
    • Drawing
    • Screen Coordinates
    • Graphics class
    • Who calls paintComponent
    • Color
    • Polygons
  • Summary: Drawing component
    • JPanel - Drawing Area
    • JPanel - Drawing Area 2
    • JPanel - Example
  • Images - BufferedImage
  • Images - ImageIcon
  • Graphics2D
    • Graphics2D
    • Antialiasing
• Mouse
  • The Mouse
  • MouseListener
  • MouseMotionListener
  • Mouse Listeners
  • Mouse Buttons, Modifier Keys
• Keyboard
  • Keyboard
  • Example - KeyDemo