Computer Science 202
Introduction to Programming

Fall 2012, The College of Saint Rose

Home     Syllabus     Schedule     Examples

Class examples will be linked below. Please report any missing examples.

Beginning with Programming

• StudentAverages - a first Java program example

Java Fundamentals

• Seuss - extended "Hello, World" type example
• HelloYou - keyboard input (with Scanner), variables, String type, String concatenation
• Rectangle - int variables, Scanner's nextInt method, mathematical expressions
• MilesPerGallon - double variables, Scanner's nextDouble method
• RunsScored - named constant, int vs.double math, reading multiple items from a Scanner after a single prompt

Conditional Execution

• OlderThanJava - our first if statement
• OlderYoungerThanJava - our first if-else statement
• NoInterestLoan - JOptionPane dialog boxes, Integer.parseInt
• ShouldWeSki - a nested conditional
• NameAndTown - our first if-else-if construct, String's length method
• BooleanDemo - more boolean operators, including && and ||, boolean variables
• MassPikeTolls - System.exit(1), error dialogs, String equals method
• CSOfficesIfElse - motivational example for switch statements
• CSOfficesSwitch - use of switch statements
• LittlePrimes - a switch with multiple cases executing the same code
• Payroll - DecimalFormat objects for custom floating point output format, multiple variable declarations on one line

Repetition

• PerfectSquares - the while statement, the ++ operator
• MassPikeTollsBetter - better error checking using while loops
• Checkout - the do-while statement, the += shorthand notation
• Sum1To10 - the for statement
• LongestWord - loop structure similar to "Grade Summary" lab
• Countdown - counting down with a for loop
• Sum2ToNBy2 - the for statement counting by 2's
• GeometricFractionalSum - a counting loop with a second variable changing on each iteration

Random Numbers

• RandomDemo - examples of how to generate various types of random numbers in Visual Logic and Java
• GuessingGame - a random number for a children's guess the number game
• MonteCarloPi - using random numbers to approximate Pi, Math.sqrt

File I/O

• HelloWorldFile - opening a file for output with a PrintWriter
• CircleAreas - read in numbers from a keyboard, print circle radii to a file
• AddNumbersFromFile - read in a fixed number of numbers from a file, add them up, a file Scanner
• AddNumbersFromFileSentinel - read in numbers from a file, add them up, ending with a sentinel value
• AddNumbersFromFileAll - read in numbers from a file until no more numbers are available (end of file), Scanner's hasNextInt method
• WordCount - count the number of words in an input file, Scanner's hasNext method
• Shout - read in a file, print its contents to another file but with all words upcased, Scanner's hasNextLine and String's toUpperCase method.

Methods

• BaaBaaBad - motivating example for methods
• BaaBaaBetter - defining a static method
• BaaBaa2Methods - 2 methods
• NumberInfo - a method that takes a parameter
• HoursWorked - passing a String to a method, and usins a Scanner to break it into components
• HoursWorked2 - same example, but pass in the Scanner as a parameter
• SumOfSquares - a method that takes two parameters
• Sum1ToN - a method that returns a value
• Sum1ToNBetter - a better version of the previous method
• Distance - a method that computes the distance between two points in the plane
• GradingBreakdown - a longer program that reads lots of inputs, just screaming out for a method to help organize
• GradingBreakdownBetter - the same program with a method introduced to organize the code better

Classes

• RatiosNoClass - a motivating example without classes
• Ratios - a first look at a custom class