Learn Java the Hard Way

Second Edition!

Table of Contents

• Preface: Learning by Doing
• Introduction: The Challenge of Java as a First Language
• Exercise 0: The Setup
• Exercise 1: An Important Message
• Exercise 2: More Printing
• Exercise 3: Printing Choices
• Exercise 4: Escape Sequences and Comments
• Exercise 5: Saving Information in Variables
• Exercise 6: Mathematical Operations
• Exercise 7: Getting Input from a Human
• Exercise 8: Storing the Human’s Responses
• Exercise 9: Calculations with User Input
• Exercise 10: Variables Only Hold Values
• Exercise 11: Variable Modification Shortcuts
• Exercise 12: Boolean Expressions (True or False)
• Exercise 13: Comparing Strings
• Exercise 14: Compound Boolean Expressions (And, Or, Not)
• Exercise 15: Making Decisions with If Statements
• Exercise 16: More If Statements
• Exercise 17: Otherwise (If Statements with Else)
• Exercise 18: If Statements with Strings
• Exercise 19: Mutual Exclusion with Chains of If and Else
• Exercise 20: More Chains of Ifs and Else
• Exercise 21: Nested If Statements
• Exercise 22: Making Decisions with a Big Switch
• Exercise 23: More String Comparisons
• Exercise 24: Choosing Numbers Randomly
• Exercise 25: Repeating Yourself using a While Loop
• Exercise 26: A Number-Guessing Game
• Exercise 27: Infinite Loops
• Exercise 28: Using Loops for Error-Checking
• Exercise 29: Do-While Loops
• Exercise 30: Adding Values One at a Time
• Exercise 31: Adding Values for a Dice Game
• Exercise 32: The Dice Game Called ‘Pig’
• Exercise 33: Calling a Function
• Exercise 34: Calling Functions to Draw a Flag
• Exercise 35: Displaying Dice with Functions
• Exercise 36: Returning a Value from a Function
• Exercise 37: Areas of Shapes
• Exercise 38: Thirty Days Revisited with Javadoc
• Exercise 39: Importing Standard Libraries
• Exercise 40: Programs that Write to Files
• Exercise 41: Getting Data from a File
• Exercise 42: Getting ALL the Data from a File
• Exercise 43: Saving a High Score
• Exercise 44: Counting with a For Loop
• Exercise 45: Caesar Cipher (Looping Through a String)
• Exercise 46: Nested For Loops
• Exercise 47: Generating and Filtering Values
• Exercise 48: Arrays - Many Values in a Single Variable
• Exercise 49: Finding Things in an Array
• Exercise 50: Saying Something Is NOT in an Array
• Exercise 51: Arrays Without Foreach Loops
• Exercise 52: Lowest Temperature
• Exercise 53: Mailing Addresses (Records)
• Exercise 54: Records from a File
• Exercise 55: An Array of Records
• Exercise 56: Array of Records from a File (Temperatures Revisited)
• Exercise 57: A Deck of Playing Cards
• Exercise 58: Final Project - Text Adventure Game
• Next Steps

Frequently Asked Questions

How long does this course take?

You should take as long as it takes to get through it, but focus on doing work every day. Some people take about 3 months, others 6 months, and some only a week.

What kind of computer do I need?

You will need either a Windows, OS X or Linux computer to complete this book.

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“Learn Java the Hard Way” is ©2013–2015 Graham Mitchell