• Syllabus
• Got Java? (Download it here)
• Before Beginning (Class policies, lab procedures, etc)
• Unit 1 - Introduction (Chapter 1)
• Unit 2 - Introduction to Objects and Classes (Chapter 2)
• Unit 3 - Fundamental Data Types, Reading User Input, and More (Chapter 3)
• Unit 4 - Decision-Making (Chapter 5)
• Unit 5 - Iteration (i.e., Repetition) (Chapter 6)
• Unit 6 - Intro to Java's Arrays Class (13.4 - 13.6)
• Unit 7 - Data Files (15.1 - 15.2)
• Unit 8 - Designing Classes (Chapter 7)
• Unit 9 - The String Class, Revisited

Got Java?

   Java 2 Software

From Sun Microsystems, the Java Software Developers Toolkit (SDK)
(Follow this link. Then, under the heading Download J2SE v 1.4.xxx click on the Download link in the SDK column (not the JRE column) of the Windows row

   Java Documentation

Also from Sun, official Java documentation in hypertext format
(Follow this link, then scroll down to the bottom of the page for the documentation)

   JCreator 2.50 - A nice Java IDE (Integrated Development Environment)

- The Limited Edition (LE) is free
- Note: Must previously have installed Java 2

Before Beginning (Class policies, etc)

   How to be Successful in This Class

A word to the wise...

   Class Policies

Official class rules regarding late assignments, makeup tests, partial credit, etc., and School of Computer Science policy on Incompletes and Academic Honesty

   Source Code

Download all the sample programs in the textbook

   Errata

Links to author's list of typographical errors in the textbook

Unit 1 - Introduction (Chapter 1)

   Brief History of Programming Languages

Machine Languages, Assembly Languages, High-Level Languages, and the role of the compiler

   Errors

Syntax Errors, Exceptions, and Logic Errors

   Hello.java

Traditional first program shows basic Java program layout with a public class definition and main method. Also shows an output statement with a string literal (i.e., "constant")

   Ground Rules for Java Programs

As shown in Hello.java, some basic rules for all Java programs

   Using the JCreator IDE

How to create, save, compile, and execute Java programs using JCreator, and how to print the program listing (i.e., the "source" code) and the program output. Also covers important lab security procedures

   Answers to Exercises in Chapter 1

   Assignment #1

Using the JCreator IDE

Unit 2 - Introduction to Objects and Classes (Chapter 2)

   OOP Terminology and Concepts

Classes, Objects, Methods, Instance Variables, Class Interface vs. Class Implementation, and more, explained

   MoveTest.java

Shows object variables, object references, object construction ("instantiation") and "sending messages" to objects (i.e., calling methods for objects). Also, string concatenation, the length() method of the String class, and some escape sequences

   GreeterTest.java

Shows a method that returns a String object. The Greeter class has a default constructor

   Class Constructors

A constructor is a special method that is called automatically whenever an object is instantiated (i.e., created)

   Parameters and Arguments

When a method is called, the parameters in the method heading automatically take on the values of the corresponding arguments in the method call. This is how information is passed into a method

   GreeterTest2.java

Second version of the Greeter class shows how a constructor uses its parameters to initialize the instance variables of the object being created

   All About Variables

What is a variable and what are the differences between instance variables, parameter variables ("parameters"), and local variables?

   More About Methods

There are two kinds of methods in the world - those that return a value and those that do not. Here's what you need to know about them

   Accessor and Mutator Methods

Also known as "get" and "set" methods, accessor methods return the value of an instance variable and mutator methods change the value of an instance variable

   Method Overloading

Overloading class constructors allows creation of objects with different numbers of initial values specified

   BankAccountTest.java

Shows overloaded constructors, and accessor and mutator methods (aka: "get" and "set" methods)

   Assignment #2

A class with accessor and mutator methods

   Answers to Exercises in Chapter 2

Unit 3 - Fundamental Data Types, Reading User Input, and More - Chapter 3

   Java's "Primitive" Types

The primitive types are implemented differently than objects. Although 6 different numeric types are available, there is generally no reason to use any other than int and double

   Java Arithmetic

The arithmetic operators and operator precedence. Also, integer division and modulus ("mod")

   PizzaCalculatorTest.java

Shows arithmetic expressions and assignment statements

   Assignment #3

Java Arithmetic

   PythagorasTest.java

Shows how to call the static methods of Java's Math class, using methods sqrt and pow

   Reading User Input

How to use method showInputDialog of the JOptionPane class to display a dialog box and return a string entered by the user. Also, using methods parseInt and parseDouble to convert a string to an int or double value

   InputTest.java

Demonstrates methods showInputDialog and parseInt

   Formatted Output

Java's NumberFormat class makes it easy to print floating-point numbers rounded to any number of decimal places, or formatted as currency

   Programming Style

Conventions for creating readable code

   Implicit and Explicit Method Parameters and this

Every non-static method is automatically passed one implicit parameter, which is the object for which the method was called. The reference to the implicit parameter is this

   BankAccountTest2.java

Demonstrates objects passed implicitly and explicitly, this, and calling one method of a class from another

   The Assignment Statement in Java

What Java's "=" operator means

   AssignmentDemo.java

Using "=" with objects

   Assignment #4

Input and Using the Math Class Methods

   Shadowing

If a method has a parameter variable or local variable with the same name as an instance variable, then the instance variable is "shadowed" or "hidden" by the parameter or local variable and cannot be accessed in that method. We can use this to guard against accidental shadowing

   Answers to Exercises in Chapter 3

Unit 4 - Decision-Making - Chapter 5

   The if Statement

Syntax and execution of the single-alternative, double-alternative, and multiple-alternative forms of the if statement

   PayMaster1.java

Demonstrates the single-alternative if statement

   PayMaster2.java

The two-alternative if statement

   Boolean Operators and Expressions

Boolean operators !, &&, and ||, operator precedence, truth tables, and DeMorgan's Laws

   LeapYearTester.java

Demonstrates all things boolean: operators, variables, assignment statements, and a boolean method

   LeapYearTester2.java

Shows a method with multiple return statements

   Study Guide for the Midterm Exam

   Assignment #5

Decision-Making and boolean Type

   Answers to Exercises in Chapter 5 (Decision-Making)

Unit 5 - Iteration (i.e., Repetition) - Chapter 6

   The while Statement

Syntax and execution of Java's while loop. Loop control variables and loop "necessities"

   GaussTester.java

Gauss class uses a while loop to compute sum of integers from 1 to n, where n is entered by the user. Demonstrates counters and accumulators

   DataSetTester.java

DataSet class computes average and maximum of a set of data values. Driver class DataSetTester uses a while loop to read and process data until end-of-file

   DataSetTester2.java

Version 2 of the DataSetTester class shows how an input statement can be part of the loop condition! This is commonly done in loops that read and process a set of data

   Some Comments on Comments

Documentation standards for our programs, and how to use Java's documentation comments

   Using the javadoc Utility Program

How to use the javadoc utility to automatically generate HTML "help" pages your classes. These pages will have the same format as the official Java Language Documentation from Sun Microsystems

   The for Statement

Java's for loop is a count-controlled while loop, used when you can determine in advance the exact number of iterations to be done

   TemperatureConverter.java

Uses a for loop to print a table of Fahrenheit temperatures and their Celsius equivalents

   The do-while Statement

The "do-while" loop is a post-test loop. Also, when to use each type of loop

   Assignment #6

Repetition (and static "class" variables and methods)

   PrimeMinister.java

Finds and prints the first N prime numbers, where N is entered by the user. Demonstrates the conditional loops (while and do-while). Also, private "utility" methods and String class method length

   TableTester.java

Uses nested for statements to print multiplication tables

   Answers to Exercises in Chapter 6 (Repetition)

Unit 6 - Intro to Java's Arrays Class (13.4 - 13.6)

   Intro to Arrays

Basic concepts: data structures, arrays, array elements and array subscripts. Using a loop to "traverse" an array, declaring array object variables and creating array objects, the length instance variable, and overflowing the bounds of an array

   ElementaryListTester.java

The ElementaryList class has an instance variable that is an array object variable, and a constructor that creates an array object of the size (i.e., number of elements) specified by the user. Shows how to use a for statement to "traverse" an array (i.e., to "visit" each element)

   Partially Filled Arrays

We don't always know in advance how many values will be stored in an array. In that case, the array may be only partially filled, and we must use a counter to keep track of the number of elements used

   DataListTester.java

The DataList class implements a simple list of integers, using an array. It has methods to add an int to a list, to return the average, to return the maximum, and to print a table of the values and their deviations from the average. Shows how to use a counter to store data in an array when the number of data values is not known in advance

   Align.java

A class to right-align, left-align, or center-align data in a field of a specified width, making it easy to display output in table form. The DataList class "depends on" the Align class, so to use the DataList class you must store a copy of the Align class in the same folder

   The StringTokenizer Class

How to break up a long string (such as a line of input) into individual, whitespace-delimited "tokens" that may be processed separately

   TokenizerDemo.java

Reads any number of sentences entered by the user, tokenizes each one, and prints each token

   Assignment #7 - Arrays

   PurchaseListTester.java

A Purchase object has the number of items bought, item description, and cost of the item. The PurchaseList class uses an array to maintain a list of Purchase objects.

   SearchAndSortTester.java

Demonstrates the linear search and selection sort algorithms. Also, random numbers

   The Binary Search

The binary search algorithm is much more efficient than the linear search, but can only be done on a sorted array

   Assignment #8 - Arrays of Objects

universe.txt - Data file to be used with this assignment
Stuff.java - Class to be used with this assignment

   Answers to Array Exercises in Chapter 13

Unit 7 - Data Files (15.1 - 15.3)

   Working with Data Files in Java

Everything you need to know about working with text files, including file types and access methods, throws clauses, FileReader, BufferedReader, FileWriter, and PrintWriter classes, methods read and readLine, methods print and println, and method close

   FileIO.java

Demonstrates everything you need to know about working with data files

Unit 8 - Designing Classes - Chapter 7

   ParamPasser.java

In Java, all method parameters are passed "by value". This program shows this to be true for primitive-type parameters

   ParamPasser2.java

This program shows that object variables (which store object references ) are also passed by value. This means that although you can't make an object parameter point to a different object, you can modify the object to which it points

   Static "Class" Variables and Static Methods

What they are, why we need them, how they are used

   StaticDemo.java

Demonstrates everything you need to know about static variables and methods

   Answers to Exercises in Chapter 7 (Designing Classes)

Unit 9 - The String Class, Revisited

   Major String Class Methods

String class methods length, indexOf, substring, toUpperCase, and toLowerCase, and a review of String concatenation

   StringMethodDemo.java

Shows how to use all the String methods listed above