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Lecture MGE-04: Geoinformation Systems, Winter term 2018/19

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Homework Assignment 1
Please submit your java Files via eCampus until November 4, 8 am.
Task 1
The following two classes are given:
Disk
􀀀 center: Point
􀀀 r: double
+ area(): double
+ perimeter(): double
+ distance(Disk): double
+ intersects(Disk): boolean
Point
􀀀 x: double
􀀀 y: double
+ distance(): double
The class Point has two private attributes, x and y, both of type double. There is a
constructor which expects x and y as attributes. Besides getters and setters, there is a
method for computing the distance to another point.
Objects of the class Disk have attributes center, a Point, and r, a double. These
attributes are private. Hence, getters and setters are necessary. Initially, these attributes
are set with the help of the constructor. Furthermore, there are methods for computing
the area of a disk and its perimeter, respectively. Besides, the minimum distance to
another disk is computable. Two disk intersect if their (minimum) distance is 0; in that
case, intersects returns true.
a) Implement the classes in Java programming lan-
guage. Provide both classes with getters and set-
ters for every attribute and a constructor that ex-
pects initial values for the attributes as parame-
ters.
b) Deal with the given example in a main method us-
ing the given classes. Answer the following ques-
tion with a meaningful output: Do the circles in-
tersect?
A(0; 0)
B(􀀀3:2;􀀀4:8)
C(3:2; 6:4) D(6:4; 6:4)
1
MGE-04: Geoinformation Systems
Task 2
In a cycling-route planner, information on the elevation prole is modeled as follows:
PointInProle
􀀀d: double
􀀀h: double
+PointInProle(double, double)
+getD(): double
+setD(double): void
+getH(): double
+setH(double): void
Prole
􀀀points: PointInProle[]
+Prole(PointInProle[])
+getPoints(): PointInProle[]
+setPoints(PointInProle[]): void
+subProle(int,int): Prole
+totalAscent(): double
+maxSlope(): double
The following gure shows an example. Here, P2 is a point in the prole with d = d2
and h = h2. The prole is described with an array [P1; P2; P3; P4; P5; P6; P7] of PointInProle
objects. In the following, we assume that arrays of points are always sorted by distance d.
ascent (in total: 5)
10 50 100 150
Implement both classes.
Constructors and setters set attribute values only. Getters return attribute values and
leave the object unchanged.
subProfile: This method expects two indices i and j. If i and j are valid indices with
i < j a new Prole object is generated with the points Pi, Pi+1,. . . , Pj and returned.
totalAscent: See example; only positive values are considered.
maxSlope: This method returns the maximum slope that occurs in the considered
prole.
Implement the given example.
2 /Institut fur Geodasie und Geoinformation

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New Arrivals - 

• (Part A)

Part A – Simulation

• Create a package called edu.neu.csye6200.ca 

• Create supporting classes to perform Cellular Automata calculations – Recommended tasks:

• Create a  CACrystal , which holds a 2D array of cells

• Create a  CACell helper class which defines the state of a cell

• Create a  CARule class  which can assign a new cell based on a prior crystal

• Create a  CACrystalSet that holds multiple  CACrystals and can call the  CA Rule class repeatedly to  generate a new  crystal state

• Build a simulation routine or class

• Set initial conditions

• Add a run() method that executes creation

• Demonstrate valid 2D  Cellualr Automata crystal growth

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Homework #4 (include Name, CST250-nn LAB4, & date) 

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I. Answer the even numbered CheckPoint questions (through 18.24).

2. Answer the even numbered end of chapter Review questions (multiple choice and true/false, through 18.18). Also, answer slide 44

3. Answer the 4 Find the Errors questions (page 1163).

4. Write an app somewhat based on Code 18-13 GenericSearchArray that asks a user if they want to search for String or Integer values, as well as the name of the .txt file containing the data. Then you repeatedly prompt for a value to search for, until they indicate they want to quit. You could use Numbers.txt from Chap. 7 and MyFriends.txt from Chap.4 or make up your own -txt files for input data to be searched. Your app should include appropriate Exception Handling via try... catch blocks (e.g., what if the file is not found, or the user inputs characters instead of digits for the Integer data). Use JOptionPane to interact with the user (text pp. 92-8). Name your app CST250xxChapl 8genericSearchArrays where xx your initials ** Provide both hardcopy and softcopy of your java file(s)

/**
   This program uses a generic method to sequentially
   search an array for a value.
*/

public class GenericSearchArray
{
   public static void main(String[] args)
   {
      int position;  // To hold a string's position in the array
      
      // Array of strings to search
      String[] names = { "Jack", "Kelly", "Beth",
                         "Chris", "Kenny", "Britainy" };

      // Search the array for Chris.
      position = sequentialSearch(names, "Chris");

      // Determine whether Chris was found.
      if (position == -1)
         System.out.println("Chris is not in the array. ");
      else
         System.out.println("Chris is at position " + position);
   }
   
   /**
      The sequentialSearch method searches an array for
      a value.
      @param array The array to search.
      @param value The value to search for.
      @return The subscript of the value if found in the
              array, otherwise -1.
   */

   public static < E extends Comparable<E> > 
            int sequentialSearch(E[] array, E value)
   {
      int index;        // Loop control variable
      int position;      // Position the value is found at
      boolean found;    // Flag indicating search results

      // Position 0 is the starting point of the search.
      index = 0;

      // Store the default values position and found.
      position = -1;
      found = false;

      // Search the array.
      while (!found && index < array.length)
      {
         if (array[index].compareTo(value) == 0)
         {
            found = true;
            position = index;
         }
         index++;
      }

      return position;
   }
}

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Calculate Payroll
Write a program that can be used to calculate a worker’s expected wages, deductions and net pay based upon the hours worked and pay rate, both entered by the user.
The following percentages are to be used as constants in your program for calculation of withholdings:
• Federal tax withholding rate: 15%
• State tax withholding rate: 4%
• City tax withholding rate: 2%
• Social Security tax rate: 6.2%
• Medicare tax rate: 1.45%
You may declare any additional variables as needed
For this assignment, you are to write six (6) methods, in addition to your main method, as itemized below.
1. Write a method that will allow the user to input the number of hours worked OR their pay rate as separate individual calls to this method. Since both of these values are of type double, you should be able to write one method to accommodate both data items with the only thing changing in each case being the query to the user (“Enter Hours Worked: ” or “Enter Pay Rate: “). This method will contain a loop structure that will iterate until proper input is achieved (data validation). When finished, you should have a generic method that returns a double and can be used throughout your work whenever you need a method to return a validated double. I would suggest that you write similar methods for other data types. You will find this useful in the future. The header of this method should look something like:
private static double GetDoubleAmount(String prompt) prompt = question to the user
2. Write a method that calculates and returns their total pay by multiplying the hours worked times their pay rate.
3. Write a single method that can be used to calculate and return each deduction individually. For instance, this method will be able to calculate both federal OR state taxes by changing only the values sent to the formal parameters via arguments. From this, you will see the true value of methods.
4. Write a method to output pay:
Hours Worked: 41.25
Pay Rate: 20.00
Pay:
Gross Pay 825.00
5. Write a method to output deductions:
Deductions:
Federal Tax 123.75
State Tax 33.00
City Tax 16.50
Social Sec 51.15
Medicare + 11.96
-------
Total Deductions 236.36
6. Write a method to output net pay:
Net Pay 588.64
All together, your output will be:
Enter Hours Worked: 41.25
Enter Pay Rate: 20
Hours Worked: 41.25
Pay Rate: 20.00
Pay:
Gross Pay 825.00
Deductions:
Federal Tax 123.75
State Tax 33.00
City Tax 16.50
Social Sec 51.15
Medicare + 11.96
-------
Total Deductions 236.36
Net Pay 588.64
BONUS CHALLENGE: (20 points) Modify the above requirement to incorporate overtime pay for hours worked over 40 hours. The overtime rate will be 1.5 times their pay rate for those hours worked over 40. Below are 2 runs of this program, one with hours > 40 (overtime accounted for) and one with hours <= 40:
Enter Hours Worked: 41
Enter Pay Rate: 20
Hours Worked: 41.00
Pay Rate: 20.00
Pay:
Regular Pay: 800.00
OT Pay + 30.00
-------
Gross Pay 830.00
Deductions:
Federal Tax 124.50
State Tax 33.20
City Tax 16.60
Social Sec 51.46
Medicare + 12.04
-------
Total Deductions 237.80
Net Pay 592.20
Enter Hours Worked: 40
Enter Pay Rate: 20
Hours Worked: 40.00
Pay Rate: 20.00
Pay:
Gross Pay 800.00
Deductions:
Federal Tax 120.00
State Tax 32.00
City Tax 16.00
Social Sec 49.60
Medicare + 11.60
-------
Total Deductions 229.20
Net Pay 570.80
Once you are completed, save the source code file (.java). Don't forget to put the following information in your submitted file as code comments: Your name Project Name
Date Description of Program Developed and Compiled using // Doug Streitenberger // Chapter 5 Programming Assignment // Today’s Date // This program... // Developed and compiled using NetBeans Finally, click on the link to attach the completed .java file. When you have finished attaching your solution, don't forget to press the SUBMIT button.

Download The Solution for Payroll Assignment.

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