Question

This is in Java, thanks!

d Define two subclasses as below: 1) “Advanced Java” with an additional field called “grades_in_class” 2) “Web Technology” with an additional field called “grades_Quizzes”. Define the required constructors and getter methods in both classes.

e Override the computeGrade() in both classes as below: 1. In Advanced Java, Fgrade= 40%* avg_exams+ 40%* avg_Assignments + 20* grades_in_class 2. In Web Technology, Fgrade= 30%* avg_exams+ 50%* avg_Assignments + 20*grades_Quizzes Note: Fgrade is a local variable in the computeGrade() method.

f Override the computeLetterGrade() as below a. Advanced Java: =60 && =70 && =80 && =90 && =60 && =75 && =85 && =95 && <=100 A

g Define a class named “Student” with PSID, and name as instance variables.

h Define a class named StudentOneSub that extends the Student class with an object of Advanced Java as an additional instance variable. Define a method displayOS() to display Final grade , and Letter Grade.

i Define a class named StudentTwoSub that extends the Student class with an object of Advanced Java and an object of Web Technology as additional instance variables. Define a method displayTS() to display Final grade , and Letter Grade in both subjects.

j Define a DemoGrades class with a main () method, create objects for both the StudentOneSub, and StudentTwoSub to display final grades and letter grades for the corresponding objects

Answer 1

Note: Could you plz go through this code and let me know if u need any changes in this.Thank You
=================================

// FinalGrade.java

public interface FinalGrade {
double computeFinalGrades();
}

===========================

// LetterGrade.java

public interface LetterGrade {
char computeLetterGrade();
}

==========================

// Course.java

public class Course {
   private String subjectCode;
   private double average_exams;
   private double average_assignments;
   /**
   * @param subjectCode
   * @param average_exams
   * @param average_assignments
   */
   public Course(String subjectCode, double average_exams,
           double average_assignments) {
       this.subjectCode = subjectCode;
       this.average_exams = average_exams;
       this.average_assignments = average_assignments;
   }
   /**
   * @return the subjectCode
   */
   public String getSubjectCode() {
       return subjectCode;
   }
   /**
   * @param subjectCode the subjectCode to set
   */
   public void setSubjectCode(String subjectCode) {
       this.subjectCode = subjectCode;
   }
   /**
   * @return the average_exams
   */
   public double getAverage_exams() {
       return average_exams;
   }
   /**
   * @param average_exams the average_exams to set
   */
   public void setAverage_exams(double average_exams) {
       this.average_exams = average_exams;
   }
   /**
   * @return the average_assignments
   */
   public double getAverage_assignments() {
       return average_assignments;
   }
   /**
   * @param average_assignments the average_assignments to set
   */
   public void setAverage_assignments(double average_assignments) {
       this.average_assignments = average_assignments;
   }

  
}

=================================

// Advancedjava.java

public class Advancedjava extends Course implements FinalGrade, LetterGrade {
   private double gradesin_class;

   /**
   * @param subjectCode
   * @param average_exams
   * @param average_quizzes
   * @param gradesin_class
   */
   public Advancedjava(String subjectCode, double average_exams,
           double average_quizzes, double gradesin_class) {
       super(subjectCode, average_exams, average_quizzes);
       this.gradesin_class = gradesin_class;
   }

   /**
   * @return the gradesin_class
   */
   public double getGradesin_class() {
       return gradesin_class;
   }

   /**
   * @param gradesin_class
   * the gradesin_class to set
   */
   public void setGradesin_class(double gradesin_class) {
       this.gradesin_class = gradesin_class;
   }

   @Override
   public char computeLetterGrade() {
       char letterGrade = 0;
       double fgrade = computeFinalGrades();
       if (fgrade >= 90 && fgrade <= 100) {
           letterGrade = 'A';
       } else if (fgrade >= 80 && fgrade < 90) {
           letterGrade = 'B';
       } else if (fgrade >= 70 && fgrade < 80) {
           letterGrade = 'C';
       } else if (fgrade >= 60 && fgrade < 70) {
           letterGrade = 'D';
       } else if (fgrade < 60) {
           letterGrade = 'F';
       }

       return letterGrade;

   }

   @Override
   public double computeFinalGrades() {
       double Fgrade = 0.0;

       Fgrade = .40 * getAverage_exams() + 0.40 * getAverage_assignments()
               + .20 * getGradesin_class();

       return Fgrade;

   }

}

==========================

// WebTechnology.java

public class WebTechnology extends Course implements FinalGrade,LetterGrade {
private double grade_Quizzes;

   /**
   * @param subjectCode
   * @param average_exams
   * @param average_assignments
   * @param grade_Quizzes
   */
   public WebTechnology(String subjectCode, double average_exams,
           double average_assignments, double grade_Quizzes) {
       super(subjectCode, average_exams, average_assignments);
       this.grade_Quizzes = grade_Quizzes;
   }

   /**
   * @return the grade_Quizzes
   */
   public double getGrade_Quizzes() {
       return grade_Quizzes;
   }

   /**
   * @param grade_Quizzes the grade_Quizzes to set
   */
   public void setGrade_Quizzes(double grade_Quizzes) {
       this.grade_Quizzes = grade_Quizzes;
   }

   @Override
   public char computeLetterGrade() {

       double Fgrade=0.0;
       char letterGrade = 0;
       double fgrade = computeFinalGrades();
       if (fgrade >= 95 && fgrade <= 100) {
           letterGrade = 'A';
       } else if (fgrade >= 85 && fgrade < 95) {
           letterGrade = 'B';
       } else if (fgrade >= 75 && fgrade < 85) {
           letterGrade = 'C';
       } else if (fgrade >= 60 && fgrade < 75) {
           letterGrade = 'D';
       } else if (fgrade < 60) {
           letterGrade = 'F';
       }

       return letterGrade;
   }

   @Override
   public double computeFinalGrades() {
       double Fgrade=0.30*getAverage_exams()+.50*getAverage_assignments()+0.20*grade_Quizzes;
       return Fgrade;
   }
  
  
  
}

=============================

// Student.java

public class Student {

   private String PSID;
   private String name;
   /**
   * @param pSID
   * @param name
   */
   public Student(String pSID, String name) {
  
       this.PSID = pSID;
       this.name = name;
   }
   /**
   * @return the pSID
   */
   public String getPSID() {
       return PSID;
   }
   /**
   * @param pSID the pSID to set
   */
   public void setPSID(String pSID) {
       PSID = pSID;
   }
   /**
   * @return the name
   */
   public String getName() {
       return name;
   }
   /**
   * @param name the name to set
   */
   public void setName(String name) {
       this.name = name;
   }
  
  
  

}

===============================

// StudentOneSub.java

public class StudentOneSub extends Student {
private Advancedjava adJ;

   /**
   * @param pSID
   * @param name
   * @param adJ
   */
   public StudentOneSub(String pSID, String name, Advancedjava adJ) {
       super(pSID, name);
       this.adJ = adJ;
   }
public void displayOS()
{
   System.out.println("Final Grade :"+adJ.computeFinalGrades());
   System.out.println("Letter Grade :"+adJ.computeLetterGrade());
}
}

=============================

// StudenttwoSub.java

public class StudenttwoSub extends Student {
private WebTechnology wt;

   /**
   * @param pSID
   * @param name
   * @param wt
   */
   public StudenttwoSub(String pSID, String name, WebTechnology wt) {
       super(pSID, name);
       this.wt = wt;
   }

   /**
   * @return the wt
   */
   public WebTechnology getWt() {
       return wt;
   }

   /**
   * @param wt the wt to set
   */
   public void setWt(WebTechnology wt) {
       this.wt = wt;
   }
  
public void displayTS()
{
   System.out.println("Final Grade :"+wt.computeFinalGrades());
   System.out.println("Letter Grade :"+wt.computeLetterGrade());
}
  
}

=================

// DemoGrades.java

public class DemoGrades {

   public static void main(String[] args) {
       Advancedjava adJ=new Advancedjava("S1One", 89,98,99);
StudentOneSub so=new StudentOneSub("1111","James", adJ);
WebTechnology wt=new WebTechnology("S2Two", 67, 95,77);
StudenttwoSub st=new StudenttwoSub("2222", "Williams", wt);

System.out.println("Name:"+so.getName());
System.out.println("SID:"+so.getPSID());

so.displayOS();
System.out.println("Name:"+st.getName());
System.out.println("SID:"+st.getPSID());
st.displayTS();
   }

}

=================================

output:

Name:James
SID:1111
Final Grade :94.60000000000001
Letter Grade :A
Name:Williams
SID:2222
Final Grade :83.0
Letter Grade :C

=====================Could you plz rate me well.Thank You