K. Operator Precedence Chart
by Harvey M. Deitel, Paul Deitel
Android™ How to Program, Third Edition
- About This E-Book
- Title Page
- Copyright Page
- Deitel® Series Page
- Dedication Page
- Contents
- Preface
- Architecture of Android How to Program, 3/e
- App-Driven Approach
- Intended Audiences
- Instructor Resources
- Before You Begin: Software Used in Android How to Program, 3/e
- Getting up to Speed in Java and XML
- App-Development Courses
- Key Topics
- Pedagogic Features
- Working with Open-Source Apps
- Copyright Notice and Code License
- Android 6 App-Development Fundamentals LiveLessons Video Training
- Join the Deitel & Associates, Inc. Social Media Communities
- Contacting the Authors
- Acknowledgments
- About the Authors
- About Deitel & Associates, Inc.
- Before You Begin
- Software and Hardware System Requirements
- Installing the Java Development Kit (JDK)
- Setting the PATH Environment Variable
- JDK Installation Directory and the bin Subdirectory
- Setting the CLASSPATH Environment Variable
- Installing Android Studio
- Configure Android Studio to Show Line Numbers
- Configure Android Studio to Disallow Code Folding
- Android 6 SDK
- Creating Android Virtual Devices (AVDs)
- Setting Up an Android Device for Testing Apps
- Downloading the Book’s Code Examples
- A Note Regarding Android Studio and the Android SDK
- 1. Introduction to Android
- 1.1 Introduction
- 1.2 Android—The World’s Leading Mobile Operating System
- 1.3 Android Features
- 1.4 Android Operating System
- Android Version Naming Convention
- 1.4.1 Android 2.2 (Froyo)
- 1.4.2 Android 2.3 (Gingerbread)
- 1.4.3 Android 3.0 through 3.2 (Honeycomb)
- 1.4.4 Android 4.0 through 4.0.4 (Ice Cream Sandwich)
- 1.4.5 Android 4.1–4.3 (Jelly Bean)
- 1.4.6 Android 4.4 (KitKat)
- 1.4.7 Android 5.0 and 5.1 (Lollipop)
- 1.4.8 Android 6 (Marshmallow)
- 1.5 Downloading Apps from Google Play
- 1.6 Packages
- 1.7 Android Software Development Kit (SDK)
- 1.8 Object-Oriented Programming: A Quick Refresher
- 1.9 Test-Driving the Tip Calculator App in an Android Virtual Device (AVD)
- 1.10 Building Great Android Apps
- 1.11 Android Development Resources
- 1.12 Wrap-Up
- Self-Review Exercises
- Answers to Self-Review Exercises
- Exercises
- 2. Welcome App
- 2.1 Introduction
- 2.2 Technologies Overview
- 2.3 Creating an App
- 2.4 Android Studio Window
- 2.5 Building the App’s GUI with the Layout Editor
- 2.5.1 Adding an Image to the Project
- 2.5.2 Adding an App Icon
- 2.5.3 Changing RelativeLayout to a LinearLayout
- 2.5.4 Changing the LinearLayout’s id and orientation
- 2.5.5 Configuring the TextView’s id and text Properties
- 2.5.6 Configuring the TextView’s textSize Property—Scaled Pixels and Density-Independent Pixels
- 2.5.7 Setting the TextView’s textColor Property
- 2.5.8 Setting the TextView’s gravity Property
- 2.5.9 Setting the TextView’s layout:gravity Property
- 2.5.10 Setting the TextView’s layout:weight Property
- 2.5.11 Adding an ImageView to Display the Image
- 2.5.12 Previewing the Design
- 2.6 Running the Welcome App
- 2.7 Making Your App Accessible
- 2.8 Internationalizing Your App
- 2.8.1 Localization
- 2.8.2 Naming the Folders for Localized Resources
- 2.8.3 Adding String Translations to the App’s Project
- 2.8.4 Localizing Strings
- 2.8.5 Testing the App in Spanish on an AVD
- 2.8.6 Testing the App in Spanish on a Device
- 2.8.7 TalkBack and Localization
- 2.8.8 Localization Checklist
- 2.8.9 Professional Translation
- 2.9 Wrap-Up
- Self-Review Exercises
- Answers to Self-Review Exercises
- Exercises
- 3. Tip Calculator App
- 3.1 Introduction
- 3.2 Test-Driving the Tip Calculator App
- 3.3 Technologies Overview
- 3.3.1 Class Activity
- 3.3.2 Activity Lifecycle Methods
- 3.3.3 AppCompat Library and Class AppCompatActivity
- 3.3.4 Arranging Views with a GridLayout
- 3.3.5 Creating and Customizing the GUI with the Layout Editor and the Component Tree and Properties Windows
- 3.3.6 Formatting Numbers as Locale-Specific Currency and Percentage Strings
- 3.3.7 Implementing Interface TextWatcher for Handling EditText Text Changes
- 3.3.8 Implementing Interface OnSeekBarChangeListener for Handling SeekBar Thumb Position Changes
- 3.3.9 Material Themes
- 3.3.10 Material Design: Elevation and Shadows
- 3.3.11 Material Design: Colors
- 3.3.12 AndroidManifest.xml
- 3.3.13 Searching in the Properties Window
- 3.4 Building the GUI
- 3.5 Default Theme and Customizing Theme Colors
- 3.6 Adding the App’s Logic
- 3.6.1 package and import Statements
- 3.6.2 MainActivity Subclass of AppCompatActivity
- 3.6.3 Class Variables and Instance Variables
- 3.6.4 Overriding Activity Method onCreate
- 3.6.5 MainActivity Method calculate
- 3.6.6 Anonymous Inner Class That Implements Interface OnSeekBarChangeListener
- 3.6.7 Anonymous Inner Class That Implements Interface TextWatcher
- 3.7 AndroidManifest.xml
- 3.8 Wrap-Up
- Self-Review Exercises
- Answers to Self-Review Exercises
- Exercises
- 4. Flag Quiz App
- 4.1 Introduction
- 4.2 Test-Driving the Flag Quiz App
- 4.3 Technologies Overview
- 4.3.1 Menus
- 4.3.2 Fragments
- 4.3.3 Fragment Lifecycle Methods
- 4.3.4 Managing Fragments
- 4.3.5 Preferences
- 4.3.6 assets Folder
- 4.3.7 Resource Folders
- 4.3.8 Supporting Different Screen Sizes and Resolutions
- 4.3.9 Determining the Device Orientation
- 4.3.10 Toasts for Displaying Messages
- 4.3.11 Using a Handler to Execute a Runnable in the Future
- 4.3.12 Applying an Animation to a View
- 4.3.13 Using ViewAnimationUtils to Create a Circular Reveal Animator
- 4.3.14 Specifying Colors Based on a View’s State Via a Color State List
- 4.3.15 AlertDialog
- 4.3.16 Logging Exception Messages
- 4.3.17 Launching Another Activity Via an Explicit Intent
- 4.3.18 Java Data Structures
- 4.3.19 Java SE 7 Features
- 4.3.20 AndroidManifest.xml
- 4.4 Creating the Project, Resource Files and Additional Classes
- 4.4.1 Creating the Project
- 4.4.2 Blank Activity Template Layouts
- 4.4.3 Configuring Java SE 7 Support
- 4.4.4 Adding the Flag Images to the Project
- 4.4.5 strings.xml and Formatted String Resources
- 4.4.6 arrays.xml
- 4.4.7 colors.xml
- 4.4.8 button_text_color.xml
- 4.4.9 Editing menu_main.xml
- 4.4.10 Creating the Flag Shake Animation
- 4.4.11 preferences.xml for Specifying the App’s Settings
- 4.4.12 Adding Classes SettingsActivity and SettingsActivityFragment to the Project
- 4.5 Building the App’s GUI
- 4.6 MainActivity Class
- 4.6.1 package Statement and import Statements
- 4.6.2 Fields
- 4.6.3 Overridden Activity Method onCreate
- 4.6.4 Overridden Activity Method onStart
- 4.6.5 Overridden Activity Method onCreateOptionsMenu
- 4.6.6 Overridden Activity Method onOptionsItemSelected
- 4.6.7 Anonymous Inner Class That Implements OnSharedPreferenceChangeListener
- 4.7 MainActivityFragment Class
- 4.7.1 package and import Statements
- 4.7.2 Fields
- 4.7.3 Overridden Fragment Method onCreateView
- 4.7.4 Method updateGuessRows
- 4.7.5 Method updateRegions
- 4.7.6 Method resetQuiz
- 4.7.7 Method loadNextFlag
- 4.7.8 Method getCountryName
- 4.7.9 Method animate
- 4.7.10 Anonymous Inner Class That Implements OnClickListener
- 4.7.11 Method disableButtons
- 4.8 SettingsActivity Class
- 4.9 SettingsActivityFragment Class
- 4.10 AndroidManifest.xml
- 4.11 Wrap-Up
- Self-Review Exercises
- Answers to Self-Review Exercises
- Exercises
- Project Exercises
- 5. Doodlz App
- 5.1 Introduction
- 5.2 Test-Driving the Doodlz App in an Android Virtual Device (AVD)
- 5.3 Technologies Overview
- 5.3.1 Activity and Fragment Lifecycle Methods
- 5.3.2 Custom Views
- 5.3.3 Using SensorManager to Listen for Accelerometer Events
- 5.3.4 Custom DialogFragments
- 5.3.5 Drawing with Canvas, Paint and Bitmap
- 5.3.6 Processing Multiple Touch Events and Storing Lines in Paths
- 5.3.7 Saving to the Device
- 5.3.8 Printing and the Android Support Library’s PrintHelper Class
- 5.3.9 New Android 6.0 (Marshmallow) Permissions Model
- 5.3.10 Adding Dependencies Using the Gradle Build System
- 5.4 Creating the Project and Resources
- 5.5 Building the App’s GUI
- 5.6 MainActivity Class
- 5.7 MainActivityFragment Class
- 5.7.1 package Statement, import Statements and Fields
- 5.7.2 Overridden Fragment Method onCreateView
- 5.7.3 Methods onResume and enableAccelerometerListening
- 5.7.4 Methods onPause and disableAccelerometerListening
- 5.7.5 Anonymous Inner Class for Processing Accelerometer Events
- 5.7.6 Method confirmErase
- 5.7.7 Overridden Fragment Methods onCreateOptionsMenu and onOptionsItemSelected
- 5.7.8 Method saveImage
- 5.7.9 Overridden Method onRequestPermissionsResult
- 5.7.10 Methods getDoodleView and setDialogOnScreen
- 5.8 DoodleView Class
- 5.8.1 package Statement and import Statements
- 5.8.2 static and Instance Variables
- 5.8.3 Constructor
- 5.8.4 Overridden View Method onSizeChanged
- 5.8.5 Methods clear, setDrawingColor, getDrawingColor, setLineWidth and getLineWidth
- 5.8.6 Overridden View Method onDraw
- 5.8.7 Overridden View Method onTouchEvent
- 5.8.8 touchStarted Method
- 5.8.9 touchMoved Method
- 5.8.10 touchEnded Method
- 5.8.11 Method saveImage
- 5.8.12 Method printImage
- 5.9 ColorDialogFragment Class
- 5.10 LineWidthDialogFragment Class
- 5.11 EraseImageDialogFragment Class
- 5.12 Wrap-Up
- Self-Review Exercises
- Answers to Self-Review Exercises
- Exercises
- 6. Cannon Game App
- 6.1 Introduction
- 6.2 Test-Driving the Cannon Game App
- 6.3 Technologies Overview
- 6.3.1 Using the Resource Folder res/raw
- 6.3.2 Activity and Fragment Lifecycle Methods
- 6.3.3 Overriding View Method onTouchEvent
- 6.3.4 Adding Sound with SoundPool and AudioManager
- 6.3.5 Frame-by-Frame Animation with Threads, SurfaceView and SurfaceHolder
- 6.3.6 Simple Collision Detection
- 6.3.7 Immersive Mode
- 6.4 Building the GUI and Resource Files
- 6.5 Overview of This App’s Classes
- 6.6 MainActivity Subclass of Activity
- 6.7 MainActivityFragment Subclass of Fragment
- 6.8 Class GameElement
- 6.9 Blocker Subclass of GameElement
- 6.10 Target Subclass of GameElement
- 6.11 Cannon Class
- 6.12 Cannonball Subclass of GameElement
- 6.13 CannonView Subclass of SurfaceView
- 6.13.1 package and import Statements
- 6.13.2 Instance Variables and Constants
- 6.13.3 Constructor
- 6.13.4 Overriding View Method onSizeChanged
- 6.13.5 Methods getScreenWidth, getScreenHeight, and playSound
- 6.13.6 Method newGame
- 6.13.7 Method updatePositions
- 6.13.8 Method alignAndFireCannonball
- 6.13.9 Method showGameOverDialog
- 6.13.10 Method drawGameElements
- 6.13.11 Method testForCollisions
- 6.13.12 Methods stopGame and releaseResources
- 6.13.13 Implementing the SurfaceHolder.Callback Methods
- 6.13.14 Overriding View Method onTouchEvent
- 6.13.15 CannonThread: Using a Thread to Create a Game Loop
- 6.13.16 Methods hideSystemBars and showSystemBars
- 6.14 Wrap-Up
- Self-Review Exercises
- Answers to Self-Review Exercises
- Exercises
- 7. WeatherViewer App
- 7.1 Introduction
- 7.2 Test-Driving the WeatherViewer App
- 7.3 Technologies Overview
- 7.3.1 Web Services
- 7.3.2 JavaScript Object Notation (JSON) and the org.json Package
- 7.3.3 HttpUrlConnection Invoking a REST Web Service
- 7.3.4 Using AsyncTask to Perform Network Requests Outside the GUI Thread
- 7.3.5 ListView, ArrayAdapter and the View-Holder Pattern
- 7.3.6 FloatingActionButton
- 7.3.7 TextInputLayout
- 7.3.8 Snackbar
- 7.4 Building the App’s GUI and Resource Files
- 7.5 Class Weather
- 7.6 Class WeatherArrayAdapter
- 7.7 Class MainActivity
- 7.8 Wrap-Up
- Self-Review Exercises
- Answers to Self-Review Exercises
- Exercises
- Web Services and Mashups
- 8. Twitter® Searches App
- 8.1 Introduction
- 8.2 Test-Driving the App
- 8.3 Technologies Overview
- 8.4 Building the App’s GUI and Resource Files
- 8.5 MainActivity Class
- 8.5.1 package and import Statements
- 8.5.2 MainActivity Fields
- 8.5.3 Overriden Activity Method onCreate
- 8.5.4 TextWatcher Event Handler and Method updateSaveFAB
- 8.5.5 saveButton’s OnClickListener
- 8.5.6 addTaggedSearch Method
- 8.5.7 Anonymous Inner Class That Implements View.OnClickListener to Display Search Results
- 8.5.8 Anonymous Inner Class That Implements View.OnLongClickListener to Share, Edit or Delete a Search
- 8.5.9 shareSearch Method
- 8.5.10 deleteSearch Method
- 8.6 SearchesAdapter Subclass of RecyclerView.Adapter
- 8.7 ItemDivider Subclass of RecyclerView.ItemDecoration
- 8.8 A Note on Fabric: Twitter’s New Mobile Development Platform
- 8.9 Wrap-Up
- Self-Review Exercises
- Answers to Self-Review Exercises
- Exercises
- Project Exercises
- 9. Address Book App
- 9.1 Introduction
- 9.2 Test-Driving the Address Book App
- 9.3 Technologies Overview
- 9.3.1 Displaying Fragments with FragmentTransactions
- 9.3.2 Communicating Data Between a Fragment and a Host Activity
- 9.3.3 Manipulating a SQLite Database
- 9.3.4 ContentProviders and ContentResolvers
- 9.3.5 Loader and LoaderManager—Asynchronous Database Access
- 9.3.6 Defining Styles and Applying Them to GUI Components
- 9.3.7 Specifying a TextView Background
- 9.4 Building the GUI and Resource Files
- 9.5 Overview of This Chapter’s Classes
- 9.6 DatabaseDescription Class
- 9.7 AddressBookDatabaseHelper Class
- 9.8 AddressBookContentProvider Class
- 9.9 MainActivity Class
- 9.9.1 Superclass, Implemented Interfaces and Fields
- 9.9.2 Overridden Method onCreate
- 9.9.3 ContactsFragment.ContactsFragmentListener Methods
- 9.9.4 Method displayContact
- 9.9.5 Method displayAddEditFragment
- 9.9.6 DetailFragment.DetailFragmentListener Methods
- 9.9.7 AddEditFragment.AddEditFragmentListener Method
- 9.10 ContactsFragment Class
- 9.10.1 Superclass and Implemented Interface
- 9.10.2 ContactsFragmentListener
- 9.10.3 Fields
- 9.10.4 Overridden Fragment Method onCreateView
- 9.10.5 Overridden Fragment Methods onAttach and onDetach
- 9.10.6 Overridden Fragment Method onActivityCreated
- 9.10.7 Method updateContactList
- 9.10.8 LoaderManager.LoaderCallbacks<Cursor> Methods
- 9.11 ContactsAdapter Class
- 9.12 AddEditFragment Class
- 9.12.1 Superclass and Implemented Interface
- 9.12.2 AddEditFragmentListener
- 9.12.3 Fields
- 9.12.4 Overridden Fragment Methods onAttach, onDetach and onCreateView
- 9.12.5 TextWatcher nameChangedListener and Method updateSaveButtonFAB
- 9.12.6 View.OnClickListener saveContactButtonClicked and Method saveContact
- 9.12.7 LoaderManager.LoaderCallbacks<Cursor> Methods
- 9.13 DetailFragment Class
- 9.13.1 Superclass and Implemented Interface
- 9.13.2 DetailFragmentListener
- 9.13.3 Fields
- 9.13.4 Overridden Methods onAttach, onDetach and onCreateView
- 9.13.5 Overridden Methods onCreateOptionsMenu and onOptionsItemSelected
- 9.13.6 Method deleteContact and DialogFragment confirmDelete
- 9.13.7 LoaderManager.LoaderCallback<Cursor> Methods
- 9.14 Wrap-Up
- Self-Review Exercises
- Answers to Self-Review Exercises
- Exercises
- 10. Google Play and App Business Issues
- 10.1 Introduction
- 10.2 Preparing Your Apps for Publication
- 10.2.1 Testing Your App
- 10.2.2 End User License Agreement
- 10.2.3 Icons and Labels
- 10.2.4 Versioning Your App
- 10.2.5 Licensing to Control Access to Paid Apps
- 10.2.6 Obfuscating Your Code
- 10.2.7 Getting a Private Key for Digitally Signing Your App
- 10.2.8 Featured Image and Screenshots
- 10.2.9 Promotional App Video
- 10.3 Pricing Your App: Free or Fee
- 10.4 Monetizing Apps with In-App Advertising
- 10.5 Monetizing Apps: Using In-App Billing to Sell Virtual Goods
- 10.6 Registering at Google Play
- 10.7 Setting Up a Google Payments Merchant Account
- 10.8 Uploading Your Apps to Google Play
- 10.9 Launching Play Store from Within Your App
- 10.10 Managing Your Apps in Google Play
- 10.11 Other Android App Marketplaces
- 10.12 Other Mobile App Platforms and Porting Your Apps
- 10.13 Marketing Your Apps
- 10.14 Wrap-Up
- Self-Review Exercises
- Answers to Self-Review Exercises
- Exercises
- A. Introduction to Java Applications
- A.1 Introduction
- A.2 Your First Program in Java: Printing a Line of Text
- A.3 Modifying Your First Java Program
- A.4 Displaying Text with printf
- A.5 Another Application: Adding Integers
- Import Declarations
- Declaring Class Addition
- Declaring and Creating a Scanner to Obtain User Input from the Keyboard
- Declaring Variables to Store Integers
- Prompting the User for Input
- Obtaining an int as Input from the User
- Prompting for and Inputting a Second int
- Using Variables in a Calculation
- Displaying the Result of the Calculation
- Java API Documentation
- A.6 Memory Concepts
- A.7 Arithmetic
- A.8 Decision Making: Equality and Relational Operators
- A.9 Wrap-Up
- Self-Review Exercises
- Answers to Self-Review Exercises
- Exercises
- B. Introduction to Classes, Objects, Methods and Strings
- B.1 Introduction
- B.2 Declaring a Class with a Method and Instantiating an Object of a Class
- B.3 Declaring a Method with a Parameter
- B.4 Instance Variables, set Methods and get Methods
- B.5 Primitive Types vs. Reference Types
- B.6 Initializing Objects with Constructors
- B.7 Floating-Point Numbers and Type double
- B.8 Wrap-Up
- Self-Review Exercises
- Answers to Self-Review Exercises
- Exercises
- C. Control Statements
- C.1 Introduction
- C.2 Algorithms
- C.3 Pseudocode
- C.4 Control Structures
- C.5 if Single-Selection Statement
- C.6 if…else Double-Selection Statement
- C.7 while Repetition Statement
- C.8 Case Study: Counter-Controlled Repetition
- C.9 Case Study: Sentinel-Controlled Repetition
- C.10 Case Study: Nested Control Statements
- C.11 Compound Assignment Operators
- C.12 Increment and Decrement Operators
- C.13 Primitive Types
- C.14 Essentials of Counter-Controlled Repetition
- C.15 for Repetition Statement
- C.16 Examples Using the for Statement
- C.17 do…while Repetition Statement
- C.18 switch Multiple-Selection Statement
- C.19 break and continue Statements
- C.20 Logical Operators
- C.21 Wrap-Up
- Self-Review Exercises (Sections C.1–C.13)
- Self-Review Exercises (Sections C.14–C.20)
- Answers to Self-Review Exercises (Sections C.1–C.13)
- Answers to Self-Review Exercises (Sections C.14–C.20)
- Exercises (Sections C.1–C.13)
- Exercises (Sections C.14–C.20)
- D. Methods: A Deeper Look
- D.1 Introduction
- D.2 Program Modules in Java
- D.3 static Methods, static Fields and Class Math
- D.4 Declaring Methods with Multiple Parameters
- D.5 Notes on Declaring and Using Methods
- D.6 Method-Call Stack and Activation Records
- D.7 Argument Promotion and Casting
- D.8 Java API Packages
- D.9 Introduction to Random-Number Generation
- D.10 Case Study: A Game of Chance; Introducing Enumerations
- D.11 Scope of Declarations
- D.12 Method Overloading
- D.13 Wrap-Up
- Self-Review Exercises
- Answers to Self-Review Exercises
- Exercises
- E. Arrays and ArrayLists
- E.1 Introduction
- E.2 Arrays
- E.3 Declaring and Creating Arrays
- E.4 Examples Using Arrays
- Creating and Initializing an Array
- Using an Array Initializer
- Calculating the Values to Store in an Array
- Using Bar Charts to Display Array Data Graphically
- Using the Elements of an Array as Counters
- Using Arrays to Analyze Survey Results
- The frequency Array
- Summarizing the Results
- Exception Handling: Processing the Incorrect Response
- The try Statement
- Executing the catch Block
- toString Method of the Exception Parameter
- E.5 Case Study: Card Shuffling and Dealing Simulation
- E.6 Enhanced for Statement
- E.7 Passing Arrays to Methods
- E.8 Case Study: Class GradeBook Using an Array to Store Grades
- E.9 Multidimensional Arrays
- E.10 Case Study: Class GradeBook Using a Two-Dimensional Array
- E.11 Class Arrays
- E.12 Introduction to Collections and Class ArrayList
- E.13 Wrap-Up
- Self-Review Exercises
- Answers to Self-Review Exercises
- Exercises
- F. Classes and Objects: A Deeper Look
- F.1 Introduction
- F.2 Time Class Case Study
- F.3 Controlling Access to Members
- F.4 Referring to the Current Object’s Members with the this Reference
- F.5 Time Class Case Study: Overloaded Constructors
- F.6 Default and No-Argument Constructors
- F.7 Composition
- F.8 Enumerations
- F.9 Garbage Collection
- F.10 static Class Members
- F.11 final Instance Variables
- F.12 Packages
- F.13 Package Access
- F.14 Wrap-Up
- Self-Review Exercise
- Answers to Self-Review Exercise
- Exercises
- G. Object-Oriented Programming: Inheritance and Polymorphism
- G.1 Introduction to Inheritance
- G.2 Superclasses and Subclasses
- G.3 protected Members
- G.4 Relationship between Superclasses and Subclasses
- G.4.1 Creating and Using a CommissionEmployee Class
- G.4.2 Creating and Using a BasePlusCommissionEmployee Class
- G.4.3 Creating a CommissionEmployee–BasePlusCommissionEmployee Inheritance Hierarchy
- G.4.4 CommissionEmployee–BasePlusCommissionEmployee Inheritance Hierarchy Using protected Instance Variables
- G.4.5 CommissionEmployee–BasePlusCommissionEmployee Inheritance Hierarchy Using private Instance Variables
- G.5 Class Object
- G.6 Introduction to Polymorphism
- G.7 Polymorphism: An Example
- G.8 Demonstrating Polymorphic Behavior
- G.9 Abstract Classes and Methods
- G.10 Case Study: Payroll System Using Polymorphism
- G.10.1 Abstract Superclass Employee
- G.10.2 Concrete Subclass SalariedEmployee
- G.10.3 Concrete Subclass HourlyEmployee
- G.10.4 Concrete Subclass CommissionEmployee
- G.10.5 Indirect Concrete Subclass BasePlusCommissionEmployee
- G.10.6 Polymorphic Processing, Operator instanceof and Downcasting
- G.10.7 Summary of the Allowed Assignments Between Superclass and Subclass Variables
- G.11 final Methods and Classes
- G.12 Case Study: Creating and Using Interfaces
- Standardizing Interactions
- Software Objects Communicate Via Interfaces
- Using an Interface
- Relating Disparate Types
- Interfaces vs. Abstract Classes
- Tagging Interfaces
- G.12.1 Developing a Payable Hierarchy
- G.12.2 Interface Payable
- G.12.3 Class Invoice
- G.12.4 Modifying Class Employee to Implement Interface Payable
- G.12.5 Modifying Class SalariedEmployee for Use in the Payable Hierarchy
- G.12.6 Using Interface Payable to Process Invoices and Employees Polymorphically
- G.13 Common Interfaces of the Java API
- G.14 Wrap-Up
- Self-Review Exercises (Sections G.1G.5)
- Self-Review Exercises (Sections G.6G.13)
- Answers to Self-Review Exercises (Sections G.1G.5)
- Answers to Self-Review Exercises (Sections G.6G.13)
- Exercises (Sections G.1G.5)
- Exercises (Sections G.6G.13)
- H. Exception Handling: A Deeper Look
- H.1 Introduction
- H.2 Example: Divide by Zero without Exception Handling
- H.3 Example: Handling ArithmeticExceptions and InputMismatchExceptions
- H.4 When to Use Exception Handling
- H.5 Java Exception Hierarchy
- H.6 finally Block
- H.7 Stack Unwinding and Obtaining Information from an Exception Object
- H.8 Wrap-Up
- Self-Review Exercises
- Answers to Self-Review Exercises
- Exercises
- I. GUI Components and Event Handling
- I.1 Introduction
- I.2 Nimbus Look-and-Feel
- I.3 Text Fields and an Introduction to Event Handling with Nested Classes
- Specifying the Layout
- Creating the GUI
- Steps Required to Set Up Event Handling for a GUI Component
- Using a Nested Class to Implement an Event Handler
- Nested Class TextFieldHandler
- Registering the Event Handler for Each Text Field
- Details of Class TextFieldHandler’s actionPerformed Method
- Class TextFieldTest
- I.4 Common GUI Event Types and Listener Interfaces
- I.5 How Event Handling Works
- I.6 JButton
- Accessing the this Reference in an Object of a Top-Level Class From a Nested Class
- I.7 JComboBox; Using an Anonymous Inner Class for Event Handling
- I.8 Adapter Classes
- I.9 Wrap-Up
- Self-Review Exercises
- Answers to Self-Review Exercises
- Exercises
- J. Other Java Topics
- J.1 Introduction
- J.2 Collections Overview
- J.3 Type-Wrapper Classes for Primitive Types
- J.4 Interface Collection and Class Collections
- J.5 Lists
- J.6 Collections Methods
- J.7 Interface Queue
- J.8 Sets
- J.9 Maps
- J.10 Introduction to Files and Streams
- J.11 Class File
- J.12 Introduction to Object Serialization
- J.13 Introduction to Multithreading
- J.14 Creating and Executing Threads with the Executor Framework
- J.15 Overview of Thread Synchronization
- J.16 Concurrent Collections Overview
- J.17 Multithreading with GUI
- J.18 Wrap-Up
- Self-Review Exercises
- Answers to Self-Review Exercises
- Execises
- K. Operator Precedence Chart
- L. Primitive Types
- Index
- Code Snippets
