Java 7 Recipes. Freddy Guime. vk» (,\['«** g!p#« Carl Dea. Josh Juneau. John O'Conner

Transcription

1 1 vk» Java 7 Recipes (,\['«** - < g!p#«josh Juneau Carl Dea Freddy Guime John O'Conner

2 Contents J Contents at a Glance About the Authors About the Technical Reviewers Acknowledgments Introduction iv xvi xviii..xix xxi Chapter 1: Getting Started with Java Downloading and Installing Java Configuring the CLASSPATH Writing an Executable Java Class Compiling and Executing Java Class Printing Output Passing Arguments via the Command Line Obtaining and Setting Environment Variable Values Documenting Code with Javadoc Marking Features as Deprecated Creating Methods in a Class Passing Arguments to Methods and Returning Values Organizing Code with Packages Accepting Keyboard Input from the Command Line 23 Chapter 2: Strings Obtaining a Subsection of a String Comparing Strings Trimming Whitespace 29 vi

3 2-4. Changing the Case of a String Concatenating Strings Converting Strings to Numeric Values Iterating Over the Characters of a String Finding Text Matches Replacing All Text Matches Determining Whether a File Name Ends with a Given String 41 Chapter 3: Numbers and Dates Rounding Float and Double Values to Integers Formatting Double and Long Decimal Values Comparing int Values Comparing Floating-Point Numbers Performing Calculations with Complex Numbers Formatting and Parsing Complex Numbers Calculating Monetary Values Randomly Generating Values Obtaining the Current Date Adding and Subtracting Days, Months, and Years Finding the Difference Between Two Dates Formatting Dates for Display Comparing Dates Writing Readable Numeric Literals Declaring Binary Literals 70 Chapter 4: Data Structures, Conditionals, and Iteration Defining a Fixed Set of Related Constants Designing Intelligent Constants Executing Code Based Upon a Specified Value Working with Fix-Sized Arrays Using Generic Types Working with Dynamic Arrays 96 vii

4 4-7. Making Your Objects Iterable Iterating Over a Map 102 Chapter 5: Input and Output Serializing Java Objects Serializing Java Objects More Efficiently Serializing Java Objects as XML Creating a Socket Connection and Sending Serializable Objects Across the Wire Obtaining the Java Execution Path Copying a File Moving a File Creating a Directory lterating Over Files in a Directory Querying (and Setting) File Metadata Monitoring a Directory for Changes Reading Property Files Uncompressing Compressed Files 124 Chapter 6: Exceptions and Logging Catching Exceptions Guaranteeing that Cleanup Code Runs, No Matter What Throwing Exceptions Catching Multiple Exceptions Catching the Uncaught Exceptions Managing Resources with try/catch Blocks Creating an Exception Class Rethrowing the caught Exception Logging Events in Your Application Rotating and Purging Logs Logging Exceptions 143 Chapter 7: Object-Oriented Java Controlling Access to Members of a Class 145 viii

5 7-2. Making Private Fields Accessible Creating a Class That Can Have Only One Instance Generating Instances of a Class Creating Reusable Objects Defining an Interface for a Class Constructing Instances of the Same Class with Different Values Interacting with a Class via Interfaces Making a Class Cloneable Comparing Objects Extending the Functionality of a Class Defining a Class Template Increasing Class Encapsulation 178 Chapter 8: Concurrency Starting a Background Task Updating (and Iterating) a Map Inserting a Key into a Map Only If the Key is not Already Present Iterating Through a Changing Collection Coordinating Different Collections Splitting Work into Separate Threads Coordinating Threads Creating Threadsafe Objects Implementing Threadsafe Counters Breaking Down Tasks into Discrete Units Of Work 207 Chapter 9: Debugging and Unit Testing Understanding Exceptions : Locking Down Behavior of Your Classes Scripting Your Unit Tests Determining Code Coverage Finding Bugs Early Monitoring Garbage Collection in your Application 226

6 9-7: Spotting Memory Leaks in Your Application Getting a Thread Dump 234 Chapter 10: Unicode, Internationalization, and Currency Codes Converting Unicode Characters to Digits Creating and Working with Locales Setting the Default Locale Searching Unicode with Regular Expressions Overriding the Default Currency Converting Byte Arrays to and from Strings Converting Character Streams and Buffers 255 Chapter 11: Working with Databases Connecting to a Database Handling Connection and SQL Exceptions Querying a Database and Retrieving Results Performing CRUD Operations Simplifying Connection Management Guarding Against SQL Injection Performing Transactions Creating a Scrollable ResultSet Creating an Updatable ResultSet Caching Data for Use When Disconnected Joining RowSet Objects When Not Connected to the Data Source Filtering Data in a RowSet Querying and Storing Large Objects Storing Array Values Retrieving Array Values Invoking Stored Procedures Handling Resources Automatically 319 ichapter 12: Java 2D Graphics 321 Helper Class for This Chapter 321 X

7 12-1. Creating Points Drawing Lines Drawing Shapes Filling Shapes Gradients Transforming Shapes Making Complex Shapes Creating Interactive Shapes Changing Text Font Adding Attributes to Text Measuring Text Display Multiple Lines of Text Adding Shadows to Drawings Printing Documents Loading and Drawing an Image Altering an Image Storing an Image 391 Chapter 13: Java3D Installing Java3D Creating a Simple 3D Object Transforming Objects Animating a 3D object Navigating the Created 3D Universe Responding to Keyboard Events : Changing an Object's Lighting 410 Chapter 14: Swing API Creating a GUI Running a Swing Application Adding Components to a GUI Laying Out GUI Components 424

8 14-5. Generating Events with Buttons Refreshing a User Interface Submitting Form Values to a Database Making a Multi-Window Program Adding a Menu to an Application Adding Tabs to a Form Drawing on a Canvas Generating and Laying Out Icons Designing and Manipulating Borders Creating Text Components Associating Action Objects with Editing Commands Creating Keyboard Shortcuts Creating a Document Developing a Dialog Box Associating Listeners with a Document Formatting GUI Applications with HTML Changing the Look and Feel of a GUI Distributing a Swing Application Creating an Animation Working with the JLayer Component Adding Printing Support to Swing Components 509 { Chapter 15: JavaFX Fundamentals Installing Required Software Creating a Simple User Interface : Drawing Text : Changing Text Fonts Creating Shapes Assigning Colors to Objects Creating Menus Adding Components to a Layout 541 xii

9 51 CONTENTS Generating Borders Binding Expressions Creating and Working with Observable Lists Generating a Background Process Associating Keyboard Sequences to Applications Creating and Working with Tables Organizing Ul with Split Views Adding Tabs to the Ul Developing a Dialog Box 573 Chapter 16: Graphics with JavaFX Creating Images Generating an Animation Animating Shapes Along a Path Manipulating Layout via Grids Enhancing with CSS 615 Chapter 17: Media with JavaFX Playing Audio Playing Video Controlling Media Actions and Events Marking a Position in a Video Synchronizing Animation and Media 647 Chapter 18: Working with Servlets and Applets Setting Up a Servlet Environment Developing a Servlet Packaging, Compiling, and Deploying a Servlet Registering Servlets without WEB-XML Setting Initialization Parameters Handling Requests and Responses Setting Application-Wide Parameters Filtering Web Requests xiii

10 m CONTENTS Forwarding Requests to Other Web Resources Listening for Servlet Container Events Listening for Attribute Changes Managing Session Information Finalization of a Servlet Creating an Applet Packaging an Applet and Embedding into a Web Page Creating Draggable Applets Loading External Libraries for an Applet Using Swing Components Within an Applet 699 Chapter 19: Intro to Android Setting Up a Development Environment with Eclipse Creating a Basic Application Compiling and Testing in an Emulator Constructing a User Interface with XML Layout Constructing a User Interface Programmatically Handling Application Events and Activity Changes Tying All Application Components Together Handling Incoming Call Events Building a Tabbed User Interface Embedding Web Pages into an Application View Granting Application Device Permissions 743 Chapter 20: Java FX on the Web Embedding JavaFX Applications in a Web Page Displaying HTML5 Content Manipulating HTML5 Content with Java Code Responding to HTML Events Displaying Content from the Database 767 Chapter 21: Installing JavaMail 779 xiv

11 -8 CONTENTS Sending an Attaching a File to an Message Sending to a Group Checking Monitoring an Account 784 Chapter 22: XML Processing Writing an XML File Reading an XML File Transforming XML Validating XML Creating Java Bindings for an XML Schema Unmarshalling XML to a Java Object Building an XML Document with JAXB 803 Chapter 23: Networking Defining a Network Connection to a Server Listening for Connections on the Server Bypassing TCP for InfiniBand to Gain Performance Boosts Broadcasting to a Group of Recipients Generating and Reading from URLs Parsing a URL 820 Index 823 XV