Question

I'm trying to write a java program that will read from two separate text files(course data and class data) and output a result. There will be 3 java files and two txt files. I'll list what I'm trying to do for each:

student.java - student object class

• Attributes:
  • student name
  • major
  • class name
  • course id
  • grade
  • credits

course.java - course object class

• Attributes:
  • course id
  • instructor id
  • room id

testStudent.java - class that will create the output

• Create a report that has appropriate headings and 1 line of detail for each student record read in. Detail lines should include the following information:
  • student name,
  • class id,
  • Instructor id,
  • room id,
  • grade, - comment "good work if grade is A"
  • credits,
  • comment

-------------------------------------------------------------------------------------------

text files

--------------------------------------------------------------------------------------

classdata.txt

1001
Intro. to CompSci   
4
ALBERT, PETER A.    
Comp Info System    
A
1001
Intro. to CompSci   
4
ALLENSON, SHEILA M. 
Comp Info System    
B
1001
Intro. to CompSci   
4
ANDERSON, ALENE T.  
Comp Info System    
A
1001
Intro. to CompSci   
4
HENDRIX, JAMES D.   
Lib Arts - MIS      
C
1001
Intro. to CompSci   
4
CANNON, FREDDY B.B. 
Comp Info System    
B
1002
Visual Basic        
3
ALBERT, PETER A.    
Comp Info System    
C
1002
Visual Basic        
3
ALLENSON, SHEILA M. 
Comp Info System    
D
1002
Visual Basic        
3
ANDERSON, ALENE T.  
Comp Info System    
A
1002
Visual Basic        
3
HENDRIX, JAMES D.   
Lib Arts - MIS      
B
1002
Visual Basic        
3
CANNON, FREDDY B.B. 
Comp Info System    
B
1003
Cisco Networking I  
4
ALBERT, PETER A.    
Comp Info System    
C
1003
Cisco Networking I  
4
ALLENSON, SHEILA M. 
Comp Info System    
A
1003
Cisco Networking I  
4
ANDERSON, ALENE T.  
Comp Info System    
A
1003
Cisco Networking I  
4
HENDRIX, JAMES D.   
Lib Arts - MIS      
D
1004
Cisco Networking III
3
ALBERT, PETER A.    
Comp Info System    
B
1004
Cisco Networking III
3
ALLENSON, SHEILA M. 
Comp Info System    
C
1004
Cisco Networking III
3
ANDERSON, ALENE T.  
Comp Info System    
A
1004
Cisco Networking III
3
CANNON, FREDDY B.B. 
Comp Info System    
B
1004
Cisco Networking III
3
HELLER, HELEN H.    
Lib Arts - MIS      
A
1004
Cisco Networking III
3
HENDRIX, JAMES D.   
Lib Arts - MIS      
F

coursedata.txt

1001
WATNE          
BABCOCK134
1002
KROSHUS        
HORTON30
1003
SCHILLINGER    
LIBRARY118
1004
SCHWANTZ       
BABCOCK134

Answer 1

Solution summary :

In total four classes created :

1)Course.java 2)Student.java 3)StudentTest.java 4)TestStudent.java

StudentTest.java is an additional POJO created in order to collect required information of a student in mentioned manner.

Please read comments for the explanation of each method and class

NOTE : Change the .txt file path as per you system

Sample output:

Source code :

--------------------------------------------------------------------------------------------------

Course.java

package org.bnymellon.students;

public class Course {
   private int courseId;
   private String instructorId;
   private String roomId;
   public Course() {
       super();
       // TODO Auto-generated constructor stub
   }
   public Course(int courseId, String instructorId, String roodId) {
       super();
       this.courseId = courseId;
       this.instructorId = instructorId;
       this.roomId = roodId;
   }
   public int getCourseId() {
       return courseId;
   }
   public void setCourseId(int courseId) {
       this.courseId = courseId;
   }
   public String getInstructorId() {
       return instructorId;
   }
   public void setInstructorId(String instructorId) {
       this.instructorId = instructorId;
   }
   public String getRoomId() {
       return roomId;
   }
   public void setRoomId(String roodId) {
       this.roomId = roodId;
   }
   @Override
   public String toString() {
       return "Course [courseId=" + courseId + ", instructorId=" + instructorId + ", roodId=" + roomId + "]";
   }
  

}

Student.java

package org.bnymellon.students;

public class Student {
   private String studentName;
   private String major;
   private String className;
   private int courseId;
   private String grade;
   private int credits;
   public Student() {
       super();
       // TODO Auto-generated constructor stub
   }
   public Student(String studentName, String major, String className, int courseId, String grade, int credits) {
       super();
       this.studentName = studentName;
       this.major = major;
       this.className = className;
       this.courseId = courseId;
       this.grade = grade;
       this.credits = credits;
   }
   public String getStudentName() {
       return studentName;
   }
   public void setStudentName(String studentName) {
       this.studentName = studentName;
   }
   public String getMajor() {
       return major;
   }
   public void setMajor(String major) {
       this.major = major;
   }
   public String getClassName() {
       return className;
   }
   public void setClassName(String className) {
       this.className = className;
   }
   public int getCourseId() {
       return courseId;
   }
   public void setCourseId(int courseId) {
       this.courseId = courseId;
   }
   public String getGrade() {
       return grade;
   }
   public void setGrade(String grade) {
       this.grade = grade;
   }
   public int getCredits() {
       return credits;
   }
   public void setCredits(int credits) {
       this.credits = credits;
   }
   @Override
   public String toString() {
       return "Student [studentName=" + studentName + ", major=" + major + ", className=" + className + ", courseId="
               + courseId + ", grade=" + grade + ", credits=" + credits + "]";
   }
  

}

StudentTest.java

package org.bnymellon.students;

public class StudentTest {
   private String studentName;
   private int courseId;
   private String className;
   private String roomId;
   private String instructorId;
   private String grade;
   private int credits;
   private String comment;
   public StudentTest() {
       super();
       // TODO Auto-generated constructor stub
   }
   public StudentTest(String studentName, int courseId, String className, String roomId, String instructorId,
           String grade, int credits, String comment) {
       super();
       this.studentName = studentName;
       this.courseId = courseId;
       this.className = className;
       this.roomId = roomId;
       this.instructorId = instructorId;
       this.grade = grade;
       this.credits = credits;
       this.comment = comment;
   }
   public String getStudentName() {
       return studentName;
   }
   public void setStudentName(String studentName) {
       this.studentName = studentName;
   }
   public int getCourseId() {
       return courseId;
   }
   public void setCourseId(int courseId) {
       this.courseId = courseId;
   }
   public String getClassName() {
       return className;
   }
   public void setClassName(String className) {
       this.className = className;
   }
   public String getRoomId() {
       return roomId;
   }
   public void setRoomId(String roomId) {
       this.roomId = roomId;
   }
   public String getInstructorId() {
       return instructorId;
   }
   public void setInstructorId(String instructorId) {
       this.instructorId = instructorId;
   }
   public String getGrade() {
       return grade;
   }
   public void setGrade(String grade) {
       this.grade = grade;
   }
   public int getCredits() {
       return credits;
   }
   public void setCredits(int credits) {
       this.credits = credits;
   }
   public String getComment() {
       return comment;
   }
   public void setComment(String comment) {
       this.comment = comment;
   }
   @Override
   public String toString() {
       return "StudentTest [studentName=" + studentName + ", courseId=" + courseId + ", className=" + className
               + ", roomId=" + roomId + ", instructorId=" + instructorId + ", grade=" + grade + ", credits=" + credits
               + ", comment=" + comment + "]";
   }
  
  
}

TestStudent.java

package org.bnymellon.students;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class TestStudent {
   public static void main(String[] args) {
       List<Course> courses=getCourseList();
       List<Student> students= getStudents();
       List<StudentTest> studentTests = getStudentTesting(courses,students);
       for(StudentTest st:studentTests) {
           System.out.println(st);
       }
      
   }
  
   //Processes lists of Course and Student and creates desired List of StudentTest
   public static List<StudentTest> getStudentTesting(List<Course> courses,List<Student> students){
       List<StudentTest> returnList = new ArrayList<StudentTest>();
       for(Student s:students) {
           for(Course c: courses) {
               if(s.getCourseId() == c.getCourseId()) {
                   StudentTest temp = new StudentTest();
                   temp.setStudentName(s.getStudentName());
                   temp.setGrade(s.getGrade());
                   temp.setCredits(s.getCredits());
                   temp.setClassName(s.getClassName());
                   temp.setCourseId(c.getCourseId());
                   temp.setInstructorId(c.getInstructorId());
                   temp.setRoomId(c.getRoomId());
                   if(s.getGrade().equals("A")) { //this condition is for creating comments according to the Grade
                       temp.setComment("Great job");
                   }else {
                       temp.setComment("-");
                   }
                   returnList.add(temp);
                   break;
               }
           }
       }
       return returnList;
   }

  
   //Reads the classdata.txt file and convers the info into List of Student and returns it to main method
   public static List<Student> getStudents(){
       List<Student> returnList = new ArrayList<Student>();
       BufferedReader reader;
       try {
           reader = new BufferedReader(new FileReader(
                   "C:\\Users\\pranav\\eclipse-workspace\\interview1\\secondHibernate\\src\\main\\java\\org\\bnymellon\\students\\classdata.txt"));
           String line = reader.readLine();
           while (line != null) {
               Student tempStudent = new Student();
               tempStudent.setCourseId(Integer.parseInt(line));
               line = reader.readLine();
               tempStudent.setClassName(line);
               line = reader.readLine();
               tempStudent.setCredits(Integer.parseInt(line));
               line = reader.readLine();
               tempStudent.setStudentName(line);
               line = reader.readLine();
               tempStudent.setMajor(line);
               line = reader.readLine();
               tempStudent.setGrade(line);
               line =reader.readLine();
               returnList.add(tempStudent);
           }
           reader.close();
       } catch (IOException e) {
           e.printStackTrace();
       }
       return returnList;
   }
  
  
   //Reads the coursedata.txt file and convers the info into List of courses and returns it to main method
   public static List<Course> getCourseList(){
       List<Course> returnList = new ArrayList<Course>();
       BufferedReader reader;
       try {
           reader = new BufferedReader(new FileReader(
                   "C:\\Users\\pranav\\eclipse-workspace\\interview1\\secondHibernate\\src\\main\\java\\org\\bnymellon\\students\\coursedata.txt"));
           String line = reader.readLine();
           while (line != null) {
               Course tempCourse = new Course();
               tempCourse.setCourseId(Integer.parseInt(line));
               // read next line
               line = reader.readLine();
               tempCourse.setInstructorId(""+line);
               line = reader.readLine();
               tempCourse.setRoomId(""+line);
               returnList.add(tempCourse);
               line = reader.readLine();
           }
           reader.close();
       } catch (IOException e) {
           e.printStackTrace();
       }
       return returnList;
   }

}

-----------------------------------------------------------------------------------------------------

TextFiles Used:

classdata.txt

1001
Intro. to CompSci   
4
ALBERT, PETER A.
Comp Info System
A
1001
Intro. to CompSci   
4
ALLENSON, SHEILA M.
Comp Info System
B
1001
Intro. to CompSci   
4
ANDERSON, ALENE T.
Comp Info System
A
1001
Intro. to CompSci   
4
HENDRIX, JAMES D.   
Lib Arts - MIS
C
1001
Intro. to CompSci   
4
CANNON, FREDDY B.B.
Comp Info System
B
1002
Visual Basic
3
ALBERT, PETER A.
Comp Info System
C
1002
Visual Basic
3
ALLENSON, SHEILA M.
Comp Info System
D
1002
Visual Basic
3
ANDERSON, ALENE T.
Comp Info System
A
1002
Visual Basic
3
HENDRIX, JAMES D.   
Lib Arts - MIS
B
1002
Visual Basic
3
CANNON, FREDDY B.B.
Comp Info System
B
1003
Cisco Networking I
4
ALBERT, PETER A.
Comp Info System
C
1003
Cisco Networking I
4
ALLENSON, SHEILA M.
Comp Info System
A
1003
Cisco Networking I
4
ANDERSON, ALENE T.
Comp Info System
A
1003
Cisco Networking I
4
HENDRIX, JAMES D.   
Lib Arts - MIS
D
1004
Cisco Networking III
3
ALBERT, PETER A.
Comp Info System
B
1004
Cisco Networking III
3
ALLENSON, SHEILA M.
Comp Info System
C
1004
Cisco Networking III
3
ANDERSON, ALENE T.
Comp Info System
A
1004
Cisco Networking III
3
CANNON, FREDDY B.B.
Comp Info System
B
1004
Cisco Networking III
3
HELLER, HELEN H.
Lib Arts - MIS
A
1004
Cisco Networking III
3
HENDRIX, JAMES D.   
Lib Arts - MIS
F

coursedata.txt

1001
WATNE
BABCOCK134
1002
KROSHUS
HORTON30
1003
SCHILLINGER
LIBRARY118
1004
SCHWANTZ   
BABCOCK134