Java Fundamentals
A fast-paced and pragmatic introduction to one of the world's most popular programming languages
1st Edition
Published on 15. March 2019
408 pages
978-1-78980-295-5 (ISBN)
Description
Enhance your career options with this well-crafted object-oriented programming language that enjoys the support of an enormous ecosystem of tools and librariesKey FeaturesGet introduced to Java, its features, and its ecosystemUnderstand how Java uses object-oriented programmingBecome an expert Java exception handlerBook DescriptionSince its inception, Java has stormed the programming world. Its features and functionalities provide developers with the tools needed to write robust cross-platform applications. Java Fundamentals introduces you to these tools and functionalities that will enable you to create Java programs. The book begins with an introduction to the language, its philosophy, and evolution over time, until the latest release. You'll learn how the javac/java tools work and what Java packages are - the way a Java program is usually organized. Once you are comfortable with this, you'll be introduced to advanced concepts of the language, such as control flow keywords. You'll explore object-oriented programming and the part it plays in making Java what it is. In the concluding chapters, you'll get to grips with classes, typecasting, and interfaces, and understand the use of data structures, arrays, strings, handling exceptions, and creating generics.By the end of this book, you will have learned to write programs, automate tasks, and follow advanced courses on algorithms and data structures or explore more advanced Java courses.What you will learnCreate and run Java programsUse data types, data structures, and control flow in your codeImplement best practices while creating objectsWork with constructors and inheritanceUnderstand advanced data structures to organize and store dataEmploy generics for stronger check-types during compilationLearn to handle exceptions in your codeWho this book is forJava Fundamentals is designed for tech enthusiasts who are familiar with some programming languages and want a quick introduction to the most important principles of Java.
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Gazihan Alankus | Rogerio Theodoro de Brito | Basheer Ahamed Fazal
Java Fundamentals
A fast-paced and pragmatic introduction to one of the world's most popular programming languages
Book
03/2019
Packt Publishing
€41.00
Shipment within 3-4 weeks
Content
- Intro
- Preface
- Introduction to Java
- Introduction
- The Java Ecosystem
- Our First Java Application
- Syntax of a Simple Java Program
- Exercise 1: A Simple Hello World Program
- Exercise 2: A Simple Program for Performing Simple Mathematic Operations
- Exercise 3: Displaying Non-ASCII Characters
- Activity 1: Printing the Results of Simple Arithmetic Operations
- Getting Input from the User
- Exercise 4: Reading Values from the User and Performing Operations
- Packages
- Rules to Follow When Using Packages
- Activity 2: Reading Values from the User and Performing Operations Using the Scanner Class
- Activity 3: Calculating the Percent Increase or Decrease of Financial Instruments
- Summary
- Variables, Data Types, and Operators
- Introduction
- Variables and Data Types
- Variables
- Reserved Keywords
- Integral Data Types
- int Data Type
- long Data Type
- Type Casting
- Exercise 5: Type Casting
- byte Data Type
- short Data Type
- Boolean Data Type
- char Data Type
- Floating-Point Data Types
- float Data Type
- double Data Type
- Activity 4: Inputting Student Information and Outputting an ID
- Activity 5: Calculating the Number of Full Fruit Boxes
- Summary
- Control Flow
- Introduction
- Conditional Statements
- The if Statement
- The else Statement
- Exercise 6: Implementing a Simple if-else Statement
- The else-if Statement
- Exercise 7: Implementing the else-if Statements
- Nested if Statements
- switch case Statements
- Activity 6: Controlling the Flow of Execution Using Conditionals
- Activity 7: Developing a Temperature System
- Looping Constructs
- for Loops
- Exercise 8: Implementing a Simple for Loop
- Activity 8: Implementing the for Loop
- Nested for Loops
- Exercise 9: Implementing a Nested for Loop
- for-each Loops
- The while and do while Loops
- Exercise 10: Implementing the while Loop
- Activity 9: Implementing the while Loop
- Activity 10: Implementing Looping Constructs
- Activity 11: Continuous Peach Shipment with Nested Loops.
- Summary
- Object-Oriented Programming
- Introduction
- Object-Oriented Principles
- Classes and Objects
- Object-Oriented Programming
- Naming Conventions for Class Names
- Exercise 11: Working with Classes and Objects
- Exercise 12: Using the Person Class
- Constructors
- The this Keyword
- Activity 12: Creating a Simple Class in Java
- Activity 13: Writing a Calculator Class
- Inheritance
- Types of Inheritance
- Importance of Inheritance in OOP
- Implementing Inheritance in Java
- Activity 14: Creating a Calculator Using Inheritance
- Overloading
- Constructor Overloading
- Polymorphism and Overriding
- The Difference between Overriding and Overloading
- Annotations
- Creating Your Own Annotation Types
- References
- Activity 15: Understanding Inheritance and Polymorphism in Java
- Summary
- OOP in Depth
- Introduction
- Interfaces
- Use Case: Listeners
- Exercise 13: Implementing Interfaces
- Activity 16: Creating and Implementing Interfaces in Java
- Typecasting
- Activity 17: Using instanceof and Typecasting
- The Object Class
- Autoboxing and Unboxing
- Activity 18: Understanding Typecasting in Java
- Abstract Classes and Methods
- Activity 19: Implementing Abstract Classes and Methods in Java
- Activity 20: Use abstract class to Encapsulate Common Logic
- Summary
- Data Structures, Arrays, and Strings
- Introduction
- Data Structures and Algorithms
- Arrays
- Creating and Initializing an Array
- Accessing Elements
- Exercise 14: Creating an Array Using a Loop
- Exercise 15: Searching for a Number in an Array
- Activity 21: Finding the Smallest Number in an Array
- Activity 22: Calculator with Array of Operators
- Two-Dimensional Arrays
- Exercise 16: Printing a Simple Two-Dimensional Array
- Exercise 17: Creating a Three-Dimensional Array
- The Arrays Class in Java
- Insertion sort
- Example
- Exercise 18: Implementing Insertion Sort
- Creating an ArrayList and Adding Elements
- Replacing and Removing Elements
- Exercise 19: Adding, Removing, and Replacing Elements in an Array
- Iterators
- Exercise 20: Iterating through an ArrayList
- Activity 23: Working with ArrayList
- Strings
- Creating a String
- Concatenation
- String Length and Characters
- Activity 24: Input a String and Output Its Length and as an Array
- Activity 25: Calculator Reads from Input
- Conversion
- Comparing Strings and Parts of Strings
- StringBuilder
- Exercise 21: Working with StringBuilder
- Activity 26: Removing Duplicate Characters from a String
- Summary
- The Java Collections Framework and Generics
- Introduction
- Reading Data from Files
- Binary versus Text Files
- CSV Files
- Reading Files in Java
- Exercise 22: Reading a CSV File
- Building a CSV Reader
- Exercise 23: Building a CSV Reader
- Arrays
- Exercise 24: Reading Users from a CSV File into an Array
- Activity 27: Read Users from CSV Using Array with Initial Capacity
- The Java Collections Framework
- Vectors
- Exercise 25: Reading Users from a CSV File into a Vector
- Activity 28: Reading a Real Dataset Using Vector
- Iterating over Collections
- Activity 29: Iterating on a Vector of Users
- Hashtable
- Exercise 26: Writing an Application that Finds a User by Email
- Activity 30: Using a Hashtable to Group Data
- Generics
- What was the Problem?
- How to Use Generics
- Exercise 27: Finding a User by Text in a Name or Email
- Sorting and Comparing
- Comparables and Comparators
- Exercise 28: Creating a Comparator that Compares Strings Alphabetically
- Sorting
- Bubble Sort
- Merge Sort
- Activity 31: Sorting Users
- Data Structures
- Collection
- List
- ArrayList
- LinkedList
- Map
- HashMap
- TreeMap
- LinkedHashMap
- Set
- HashSet
- TreeSet
- LinkedHashSet
- Exercise 29: Using TreeSet to Print Sorted Users
- Queue
- java.util.ArrayDeque
- java.util.PriorityQueue
- Exercise 30: Fake Email Sender
- Properties of Collections
- Summary
- Advanced Data Structures in Java
- Introduction
- Implementing a Custom Linked List
- Disadvantages of ArrayList
- Advantages of Linked List over Arrays
- Exercise 31: Adding Elements to a Linked list
- Activity 32: Creating a Custom Linked List in Java
- Drawbacks of Linked List
- Implementing Binary Search Tree
- Exercise 32: Creating a Binary Search Tree in Java
- Activity 33: Implementing the Methods in the BinarySearchTree Class to Find the Highest and Lowest Value in the BST
- Enumerations
- Exercise 33: Using Enum to Store Directions
- Activity 34: Using an Enum to Hold College Department Details
- Activity 35: Implementing Reverse Lookup
- Set and Uniqueness in Set
- Basic Rules for the equals() and hashCode() Methods
- Adding an Object to a Set
- Exercise 34: Understanding the Behavior of equals() and hashCode()
- Exercise 35: Overriding equals() and hashCode()
- Summary
- Exception Handling
- Introduction
- Motivation behind Exceptions
- Exercise 36: Introducing Exceptions
- An Inevitable Introduction to Exceptions
- Exercise 37: Using an IDE to Generate Exception-Handling Code
- Exceptions versus Error Codes
- Exercise 38: Exceptions Versus Error Codes
- Activity 36: Handling Mistakes in Numeric User Input
- Exception Sources
- Checked Exceptions
- Throwing a Checked Exception
- Exercise 39: Working with catch or Specify
- Unchecked Exceptions
- Exercise 40: Using Methods That Throw Unchecked Exceptions
- Exception Class Hierarchy
- Browsing the Exception Hierarchy
- Throwing Exceptions and Custom Exceptions
- Exercise 41: Throwing an Exception
- Exercise 42: Creating Custom Exception Classes
- Activity 37: Writing Custom Exceptions in Java.
- Exception Mechanics
- How try/catch Works
- Exercise 43: Exception Not Caught Because It Cannot Be Assigned to a Parameter in the catch Block
- Exercise 44: Multiple catch Blocks and Their Order
- Exercise 45: Exception Propagation
- Multiple Exception Types in One Block
- Activity 38: Dealing with Multiple Exceptions in a Block
- What Are We Supposed to Do in a Catch Block?
- Exercise 46: Chained Exceptions
- finally Block and Their Mechanics
- Exercise 47: Leaving a File Open as a Result of an Exception
- Activity 39: Working with Multiple Custom Exceptions
- The try with resource Block
- Exercise 48: try with resources Block
- Best Practices
- Suppressing Exceptions
- Exercise 49: Suppressing Exceptions
- Keeping the User in the Loop
- Exercise 50: Asking the User for Help
- Do Not Throw Unless It Is Expected
- Consider Chaining and Being More Specific When You Let Exceptions Propagate
- Summary
- Appendix
- Index
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