Java for dummies
Learn to write practical, reusable code with the straightforward tutorials and tips in the newest edition of this For Dummies bestseller Do you speak Java? No, we're not talking about your morning cup 'o joe. We mean the world's most popular programming language that runs on almost a...
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| Hlavní autor: | |
|---|---|
| Médium: | E-kniha |
| Jazyk: | angličtina |
| Vydáno: |
Newark
Wiley
01.01.2022
John Wiley & Sons, Incorporated For Dummies |
| Vydání: | 8th ed |
| Edice: | For dummies |
| Témata: | |
| ISBN: | 9781119861645, 1119861640 |
| On-line přístup: | Získat plný text |
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- Switching to Default access -- Accessing default members within a package -- Protected Access for Members -- A class in one package and a subclass in another -- Two classes in the same package -- Access Modifiers for Java Classes -- Public classes -- Nonpublic classes -- From Classes Come Modules -- Chapter 15 Fancy Reference Types -- Java's Types -- The Java Interface -- Declaring two interfaces -- Implementing interfaces -- Putting the pieces together -- Abstract Classes -- Caring for your pet -- Using all your classes -- Relax! You're Not Seeing Double! -- Chapter 16 Java's Juggling Act -- Juggling Two or More Calls -- Events and event handling -- Follow the thread -- Don't miss this -- Inside the actionPerformed method -- Some Events Aren't Button Clicks -- The Inner Sanctum -- Chapter 17 Using Java Database Connectivity -- Creating a Database and a Table -- Seeing what happens when you run the code -- Using SQL commands -- Connecting and disconnecting -- Putting Data in the Table -- Retrieving Data -- Destroying Data -- One Step Beyond -- Part 5 The Part of Tens -- Chapter 18 Ten Packs of Java Websites -- This Book's Website -- For Business Issues Related to This Book -- Download the Java Development Kit -- Your Grandparents' Java Download Site -- The Horse's Mouth -- Join Java User Groups -- Find the Latest News about Java -- Find News, Reviews, and Sample Code -- Got a Technical Question about Anything? -- Become Involved in the Future of Java -- Chapter 19 Ten Bits of Advice for New Software Developers -- How Long Does It Take to Learn Java? -- Which of Your Books Should I Read? -- Are Books Other than Yours Good for Learning Java and Android Development? -- Which Computer Programming Language(s) Should I Learn? -- Which Skills Other than Computer Coding Should I Learn? -- How Should I Continue My Learning as a Software Developer?
- Assignment operators -- Chapter 5 Controlling Program Flow with Decision-Making Statements -- Making Decisions (Java if Statements) -- Guess the number -- She controlled keystrokes from the keyboard -- Creating randomness -- The if statement -- Equal, equal -- Brace yourself -- Your intent to indent -- Elseless in Helsinki -- Using Blocks in JShell -- Forming Conditions with Comparisons and Logical Operators -- Comparing numbers -- comparing characters -- Comparing objects -- Look! -- Java's logical operators -- Vive les nuls! -- (Conditions in parentheses) -- The Nesting Habits of if Statements -- Choosing among Many Alternatives -- Java's glorious switch statement -- A switch in time saves 14 -- Your grandparents' switch statement -- Free fall -- Chapter 6 Controlling Program Flow with Loops -- Repeating Instructions Over and Over Again (Java while Statements) -- Count On Me -- The anatomy of a for statement -- The world premiere of "Al's All Wet" -- You Can Always Get What You Want -- The root of the matter -- Reading a single character -- File handling in Java -- Block on the while side -- Part 3 Working with the Big Picture: Object-Oriented Programming -- Chapter 7 The Inside scOOP -- Defining a Class (What It Means to Be an Account) -- Declaring variables and creating objects -- Initializing a variable -- Using an object's fields -- One program -- several classes -- Declaring a public class -- Defining a Method within a Class (Displaying an Account) -- An account that displays itself -- The display method's header -- Sending Values to and from Methods (Calculating Interest) -- Passing a value to a method -- Returning a value from the getInterest method -- Giving Your Numbers a Makeover -- Hide-and-Seek -- Good programming -- Public lives and private dreams: Making a field inaccessible -- Enforcing rules with accessor methods
- Intro -- Title Page -- Copyright Page -- Table of Contents -- Introduction -- About This Book -- Foolish Assumptions -- Icons Used in This Book -- Beyond the Book -- Where to Go from Here -- Part 1 Getting Started with Java -- Chapter 1 All about Java -- What You Can Do with Java -- Why You Should Use Java -- Gaining Perspective: Where Java Fits In -- Object-Oriented Programming (OOP) -- Object-oriented languages -- Objects and their classes -- What's so great about an object-oriented language? -- Objects and classes are everywhere -- What's Next? -- Chapter 2 All about Software -- Get Ready for Java -- The Inside Scoop -- What is a compiler? -- What is a Java virtual machine? -- Developing Software -- Spoiler Alert! -- Chapter 3 Using the Basic Building Blocks -- Speaking the Java Language -- The grammar and the common names -- The words in a Java program -- Checking Out Java Code for the First Time -- Understanding a Simple Java Program -- The Java class -- The Java method -- The main method in a program -- How you finally tell the computer to do something -- Brace yourself -- And Now, a Few Comments -- Adding comments to your code -- What's Barry's excuse? -- Using comments to experiment with your code -- Part 2 Writing Your Own Java Programs -- Chapter 4 Making the Most of Variables and Their Values -- Varying a Variable -- Assignment statements -- The types of values that variables may have -- How to hold the line -- Numbers without decimal points -- Combining declarations and initializing variables -- Experimenting with JShell -- What Happened to All the Cool Visual Effects? -- The Atoms: Java's Primitive Types -- The char type -- The boolean type -- The Molecules and Compounds: Reference Types -- An Import Declaration -- Creating New Values by Applying Operators -- Initialize once, assign often -- The increment and decrement operators
- Experiments with Variables -- Putting a variable in its place -- Telling a variable where to go -- Passing Parameters -- Pass by value -- Returning a result -- Pass by reference -- Returning an object from a method -- Epilogue -- Chapter 11 Using Arrays to Juggle Values -- Getting Your Ducks All in a Row -- Creating an array in two easy steps -- How to book hotel guests -- Tab stops and other special things -- Make life easy for yourself -- Stepping through an array with the enhanced for loop -- Do you have a room? -- Writing to a file -- When to close a file -- Arrays of Objects -- Using the Room class -- Yet another way to beautify your numbers -- The conditional operator -- How to Argue with Your Code -- Settling the argument -- Checking for the right number of program arguments -- Chapter 12 Using Collections and Streams (When Arrays Aren't Good Enough) -- Arrays Have Limitations -- Collection Classes to the Rescue -- Using an ArrayList -- Using generics -- Wrap it up -- Are we done yet? -- Once and again -- So many collection classes! -- Functional Programming -- Problem-solving the old-fashioned way -- Lambda expressions -- A black sheep among the lambdas -- A taxonomy of lambda expressions -- The interpretation of streams -- Why bother? -- Method references -- Chapter 13 Looking Good When Things Take Unexpected Turns -- Garbage In -- The parameter in a catch clause -- Do it yourself -- Who will catch the exception? -- Catching two or more exceptions at a time -- The Buck Stops Here, Except When It Doesn't -- Catch it soon -- Catch it later -- Checked or unchecked? -- Try, Try Again! -- Chapter 14 Sharing Names among the Parts of a Java Program -- Access Modifiers -- Classes and Their Members -- Public and Private Access for Members -- Drawing on a frame -- Putting a package in its place -- Making a frame -- Default Access for Members
- How Else Should I Continue My Learning as a Developer?
- Barry's Own GUI Class -- Chapter 8 Saving Time and Money: Reusing Existing Code -- What It Means to Be an Employee -- The last word on employees -- Putting your class to good use -- Cutting a check -- Working with Disk Files (a Brief Detour) -- Storing data in a file -- Repeat after me -- Reading from a file -- Who moved my file? -- You moved your file! -- Reading a line at a time -- Clean up after yourself -- Defining Subclasses (What It Means to Be a Full-Time or Part-Time Employee) -- Creating a subclass -- Creating subclasses is habit-forming -- Using Subclasses -- Making types match -- The second half of the story -- Changing the Payments for Only Some of the Employees -- A Java annotation -- Using methods from classes and subclasses -- Chapter 9 Constructing New Objects -- Defining Constructors (What It Means to Be a Temperature) -- What is a temperature? -- What is a temperature scale? (Java's enum type) -- Okay, so then what is a temperature? -- What you can do with a temperature -- Constructing a temperature -- a slow-motion replay -- Some things never change -- Doing Something about the Weather -- Building better temperatures -- Constructors for subclasses -- Using all this stuff -- The default constructor -- A Constructor That Does More -- Classes and methods from the Java API -- Live dangerously -- Part 4 Smart Java Techniques -- Chapter 10 Putting Variables and Methods Where They Belong -- Defining a Class (What It Means to Be a Baseball Player) -- Another way to beautify your numbers -- Using the Player class -- One class -- nine objects -- Don't get all GUI on me -- Some facts about potatoes -- Making Static (Finding the Team Average) -- Why is there so much static? -- Meet the static initializer -- Displaying the overall team average -- The static keyword is yesterday's news -- Could cause static -- handle with care