CodeCheck® Java (Objects Late) Exercises

Assignments

With any of these assignments, click on the Clone button to use it in your class.

Programming Problems

Printing Simple Shapes

  • Draw a filled triangle
  • Draw a staircase
  • Draw a parallelogram
  • Draw picture with a tree and bush
  • Print lines of a Frost poem
  • Print Peter Piper poem
  • Print an equation
  • Print a multiplication table
  • Numbers and Strings

  • Compute rectangle area from given width and height constants
  • Compute rectangle area from inputs
  • Determine length of line segment
  • Print out last n characters of a string
  • Select and print substrings from string
  • Compute future value of CD
  • CD future values for different periods
  • Normalize angles
  • Print initials from names
  • Convert Farhenheit to Celsius and Kelvin
  • Initials
  • Timer
  • Decimal Degrees
  • Degree, Minute, Second
  • Distance between two points on earth
  • Swap first and last name
  • Change Firstname Lastname to Lastname, Firstname
  • Branches

  • Find larger of two integers
  • Convert between Farhenheit and Celsius
  • Put two words in lexicographic order
  • Find smallest of three integers
  • Determine letter grade from class average
  • Determine correct quadrant for angle
  • Determine worth of a pile of coins
  • Update current bank balance
  • Convert dollars and cents to nearest dime
  • Employee Pay with Overtime
  • Middle Letter
  • Check for Valid Answers
  • Overlapping sets
  • Intersecting Lines
  • Sort Names
  • Number guessing game
  • All the same
  • All different
  • All the same sign
  • Loops

  • Find all vowels in string
  • Sum of odd integers
  • Count number of vowels in string
  • Count words in a sentence
  • Count number of 7s in number
  • Raise x to the nth power
  • Compute n factorial (n!)
  • Reverse characters in a string
  • Find palindromes
  • Average characters per word
  • EvenSum
  • Stutter
  • Count perfect squares
  • Format Phone Number
  • Color codes for double-sized image
  • Run-Length Encoding
  • Static Methods

  • Get initials from name
  • 371te hax0rs
  • Determine pay for week
  • Check inputs for quizzes
  • Convert military time to AM/PM
  • Get the middle char(s) of a string
  • Determine n! recursively
  • Draw rectangle []
  • Count how many digits equal 7
  • Area of triangle
  • Combine numbers with given operator
  • Number of binary digits in n
  • Swap values by using an array
  • Count the number of times a character appears in a string
  • Arrays and Array Lists

  • Find the sum of array elements
  • Find average price in array
  • Find middle element(s) of array
  • Linear search
  • Count occurrences of given int in array
  • Find larger sum of 2D array rows
  • Compute test averages from 2 1D arrays
  • Count test averages below 70 with 2D array
  • Copy array in reverse order to ArrayList
  • Copy array to ArrayList, excluding duplicates
  • List of numbers
  • Short words
  • Select a short word
  • Diagonals on board
  • Border on board
  • Run lengths
  • Same beginning and end sequence
  • Remove short words
  • Number of even and odd elements
  • Letter frequency (count)
  • Letter frequency (percentage)
  • Swap first and second half of array
  • Swap adjacent elements in array
  • Railfence cypher
  • Implementing Classes

  • BankAccount with Service Charge
  • BankAccount with Transaction Count
  • BankAccount with Bonus for Opening Account
  • ClassSchedule
  • ClassSchedule with setDays and set times
  • ClassSchedule with getDays and set times
  • XML Map Labels
  • XML Map Labels convert to decimal degrees
  • Fill diagonals of square board with asterisks
  • Sentence class
  • Rectangle/Square: 2 constructors; 2 methods
  • Count vowels, consonants, and compute their ratio in a Sentence class
  • Add static variable and method to Coin class
  • Rental Cars with static methods for counting rented and available cars
  • Spinning disk device with getSegmentLength method
  • Spinning disk device with getTransitions method
  • Spinning disk device with getSegmentLength method
  • A Square that can grow
  • Box class with volume and surface area methods
  • Reimplement Person class to increase cohesion
  • Preconditions for Sentence constructor
  • Static field to count number of objects
  • Reimplement Vehicle class to increase cohesion
  • Introduce class to implement method that mutates value
  • Preconditions for SalaryBonus constructor
  • Static field to maintain the total value of Coin objects created
  • Interfaces

  • Make Sentence implement Measurable
  • Make a measurer for words
  • Implement the Doublable interface
  • Provide a RectangleDoubler class that implements the Doubler interface
  • Clicking the button moves the rectangle
  • Implement an Interface to Change Rectangle Dimensions
  • Implement an Interface to Provide Museum's Car Count
  • Using Anonymous Objects
  • Creating the Movement Interface
  • Using instanceof for Converting Between Animal Types
  • Inheritance

  • Extend ASCII art rectangle to filled rectangle
  • Extend ASCII art rectangle to tiled rectangle
  • Implement LabeledPoint.toString
  • Implement LabeledPoint.equals
  • Implement Tile.translate
  • Auto extending Vehicle and overriding getID
  • Inherit and call a superclass constructor
  • An enum type describing chemical elements
  • Using an Abstract Class
  • Overriding the equals Method
  • Write the constructor for the SavingsAccount subclass
  • State quarter subclass of coin class
  • Provide common shape superclass
  • Input and Output

  • Reversing the lines in a file
  • Find longest word in file
  • Processing exam scores
  • Processing names
  • Converting temperatures
  • Count number words per line in file
  • Replace vowels with underscores in file
  • Find integers in a file
  • Read file with arithmetic expressions
  • Check arithmetic expression string for exceptions
  • SuperCaesar Cipher
  • HyperCaesar cipher
  • Swap As and Os in RandomAccessFile
  • Swap adjacent characters in a RandomAccessFile
  • Reading a serialized array of objects
  • Exception Handling

  • Bank account constructor with IllegalArgumentException
  • Catching a NumberFormatException
  • Add throws clause to web reader
  • Throw IllegalArgumentException in Vehicle constructor
  • Design IllegalNumberOfWheels Exception
  • Recursion

  • Pyramid volume
  • Zipper words
  • Zipper words with helper method
  • ZipperWordGenerator
  • A recursive squid (square in diamond)
  • Reverse an integer
  • Reverse an integer with helper method
  • Multiplication as recursive addition
  • Recursive toString for array
  • Reverse toString for array
  • Extract uppercase letters from string
  • Recursive string reversal with helper method
  • Find vowels in string with recursive helper method
  • Sorting and Searching

  • Modified SelectionSort
  • Count visits in selection sort
  • Count visits in selection sort
  • Sort real data
  • Number guesser
  • Selection sort modification placing only min and max
  • Selection sort modification placing even before odd
  • Merge sort modification placing even before odd
  • Descending merge sort
  • Selection sort modification, placing the largest element first
  • Linked Lists

  • Linked list with all but the first two removed
  • Create linked list with three strings
  • Create linked list with three strings (2)
  • Remove short words
  • Duplicate short words
  • Concatenate elements backwards
  • Rotate linked list by manipulating nodes
  • Remove all but first two elements from linked list
  • Add an element to the front and back of a linked list
  • Add an element after the first and before the last
  • Implement addLast using raw nodes
  • Stacks and Queues

  • Adding and removing queue elements
  • Working with queues and stacks
  • Working with queues and stacks (2)
  • Using a stack for checking balanced parentheses
  • Palindrome testing with stack and queue
  • Sets and Maps

  • Sets of words
  • Map from strings to number of letters
  • Hash set of people
  • Tree set of people
  • Letter set
  • Letter frequency map
  • Path lengths in binary tree
  • Hash code for LabeledPoint
  • A fast priority queue
  • Unique words in two string sets
  • Map words to their lengths
  • Map word lengths to words
  • Hash code for Person class
  • Make Person class comparable
  • Generic Classes

  • Generic matrix class as array of arrays
  • Generic matrix class as linear array
  • Generic matrix class as a map with integer keys
  • Generic matrix class as a map with integer pair keys
  • Pair class with compareTo method
  • Generic pair with min method
  • Generic method for filling an array
  • Generic replicate method
  • Finding the first match for a predicate
  • Finding all matches for a predicate