Java

SPECIFICATIONS

Start with Lab05 and rename it as Lab06

Create an array of Student class objects

1. Instead of creating one instance of the Student class, create an array of Student class objects. Create the array as you would for any data type, but use Student objects, 16 elements

EXAMPLE: Student [ ] arrayStudent = new Student [16];

2. Within the loop, input data from the data file into variables

3. Create a single instance of the Student class, using the constructor

4. Place the single instance of the Student class into the array of Student objects

This completes loading the array with Student objects

Retrieve data from the array of objects (this is to prepare for Labs 07 and 08)

5. Use a for/loop to go through the array of objects and print the report

Within the loop, create a single instance of the Student class and move the object out of the array into the single instance

6. Use the class method to calculate the total, adjusted total and average

7. Do the following in the application program:

For each student, look up their name from the student name file, using the student id.

Do a sequential search from the file (not an array). Use a value returning method.

The method will open and close the file for each student look-up.

The method header needs throws FileNotFoundException

Declare the student name file in the method

Read the student id and student name, then compare student id to the search id

Once the name is found (or name not found), close the file and return the name

8. Print the report (almost exactly as in Lab05 except add the student name)

PROGRAMMING STYLE

I find it clearer to use single variables instead of subscripted variables, whenever possible.

When reading the input student file, first place data into a variable

Then create a single object.

Then place the object into the array of objects.

When retrieving data from the array of objects, return each object into a single object

Methods: should have ONE exit point.

For a value-returning method, this means one return statement

INPUT

File: Student file Lab06StudentFile.txt

Record: Student record

Field Data Type

Student id# 4 numbers (ex. 1234)

Ten test scores integers (valid numbers are 0 -100)

INPUT

File: Student name file Lab06Names.txt

Record: Student name record

Field Data Type

Student id# 4 numbers (ex. 1234)

Student name String

OUTPUT

File: Grade Report file Lab06Report.txt

Record:

Student Grade Report

ID# Name /---------------------TEST Scores----------------------/ Total Adj Total Avg

xxxx xxxxxxxxxxxxxxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxxx xxxx xxx

xxxx xxxxxxxxxxxxxxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxxx xxxx xxx

xxxx xxxxxxxxxxxxxxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxx xxxx xxxx xxx

Total students = xx

Lab 5

public class StudentLab5 {//begin class private int studentID; private int[]studentGrades = new int[10]; //class constructor public StudentLab5(int inStudentID, int[]inStudentGrades) { setStudentID(inStudentID); setStudentGradesArray(inStudentGrades); } //class default constructor public StudentLab5() { int tempArray[] = {0,0,0,0,0,0,0,0,0,0}; setStudentID(0); setStudentGradesArray(tempArray); } //set methods public void setStudentID(int inStudentID) { studentID = inStudentID; } public void setStudentGradesArray (int[]inStudentGrades) { for (int setSub = 0; setSub < 10; setSub++) { studentGrades[setSub] = inStudentGrades[setSub]; } }//end for loop //get method public int getStudentID() { return studentID; } public int[]getStudentGradesArray() { return studentGrades; } //calculate total public int calculatedTotal() {int total = 0; for (int totalSub = 0; totalSub < 10; totalSub++) { total += studentGrades[totalSub]; } return total; }// public int calculateAdjustedTotal()// { int lastSub = 0; int high = 0; int low = 100; while (lastSub < 10)//begin while { if (studentGrades[lastSub] > high) { high = studentGrades[lastSub]; } if (studentGrades[lastSub] < low) { low = studentGrades[lastSub]; } lastSub++; }//end while int adjustedTotal = calculatedTotal() + high - low; return adjustedTotal; } public int calculatedAverage()//round grade { double average = Math.round(calculateAdjustedTotal()/10.0); int roundedAverage = (int)average; return roundedAverage; } }//end class

lab 5 other part

import java.util.*; import java.io.*; public class Lab05 { //start class public static void main(String [] args) throws FileNotFoundException { //start of main method Scanner fileStudentInput = new Scanner(new FileReader("Lab05StudentFile.txt")); //input file PrintWriter reportFile = new PrintWriter("Lab05Report.txt"); //output file int studentID; int studentGrades[] = new int[10]; reportFile.println("Student Test Grades"); reportFile.println(); reportFile.printf("%-11s%5s%7s%7s%7s%7s", "StudentID", "Test1", "Test2", "Test3", "Test4", "Test5"); reportFile.printf("%7s%7s%7s%7s%8s", "Test6", "Test7", "Test8", "Test9", "Test10"); reportFile.printf("%7s%10s%9s%n", "Total", "AdjTotal", "Average"); reportFile.println(); while(fileStudentInput.hasNext())//begin while for input { studentID = fileStudentInput.nextInt(); for(int m = 0; m < studentGrades.length; m++) { studentGrades[m] = fileStudentInput.nextInt(); } StudentLab5 okay = new StudentLab5(studentID, studentGrades); studentID = okay.getStudentID(); studentGrades = okay.getStudentGradesArray(); int total = okay.calculatedTotal(); int adjustedTotal = okay.calculateAdjustedTotal(); int roundedAverage = okay.calculatedAverage(); reportFile.printf("%9d%7d", studentID, studentGrades[0]); for(int n = 1; n < (studentGrades.length - 1); n++) { reportFile.printf("%7d", studentGrades[n]); } reportFile.printf("%8d%7d%10d%9d%n", studentGrades[9], total, adjustedTotal, roundedAverage); }//end while reportFile.println(); reportFile.print("Total Students: 20"); fileStudentInput.close(); reportFile.close(); }//end main method }//end class

Lab 6 stuff

1217 Carson, Joseph 1221 Korb, Barbara 1222 Schafer, Anne 1223 Kramer, Susan 1224 Smith, Lindy 1225 Caruso, Anthony 1226 Sokalski, Mark 1227 Nickerson, Philip 1228 Wydner, Peter 1256 Anderson, Beth 1277 Meyers, Henry 1343 Vickers, Jerry 1555 Collins, Richard 1602 Zimmer, Nancy 1856 Stanson, Luke 1976 Richman, Julie 1987 Lydon, Arthur 1989 Kelley, Nico 1991 Graham, Gary 1993 Parsons, Michael

1221 100 100 100 100 100 100 100 100 100 100 1222 87 87 87 87 87 87 87 87 87 87 1223 80 80 80 80 80 80 80 80 80 80 1224 77 77 77 77 77 77 77 77 77 77 1225 70 70 70 70 70 70 70 70 70 70 1226 67 67 67 67 67 67 67 67 67 67 1227 60 60 60 60 60 60 60 60 60 60 1228 57 57 57 57 57 57 57 57 57 57 1343 90 85 80 65 75 95 85 75 80 94 1555 70 70 70 60 65 90 85 80 80 80 1856 60 0 45 68 89 67 60 50 75 80 1967 90 85 87 88 70 90 92 87 88 67 1987 68 68 68 68 68 68 68 68 68 100 1989 59 59 59 59 59 59 59 59 59 75 1991 100 90 75 85 90 88 79 88 91 90 1993 91 90 75 85 90 88 79 88 91 90