Question

Java

Create a Project named Chap4b

1. Create a Student class with instance data as follows: student id, test1, test2, and test3.

2. Create one constructor with parameter values for all instance data fields.

3. Create getters and setters for all instance data fields.

4. Provide a method called calcAverage that computes and returns the average test score for an object to the driver program.

5. Create a displayInfo method that receives the average from the driver program and displays student ID, all test scores, and the average test score. Create a driver program named TestScores

1. Create 2 student objects as follows: Student FC123 is created with test scores: 100, 80, 94 Student FC456 is created with test scores: 78, 92, 80

2. Call calcAverage() and displayInfo() for both student objects from the driver program.

Expected Output:

Student ID: FC123

Test 1 score: 100

Test 2 score: 80

Test 3 score: 94

Average test score: 91.33

Student ID: FC456

Test 1 score: 78

Test 2 score: 92

Test 3 score: 80

Average test score: 83.33

Answer 1

Project named Chap4b


public class Student {

   private static final String FC123 = "FC123"; // student id's
   private static final String FC456 = "FC456"; // student id's

   private static String Student_id;
  
   private int test1;
   private int test2;
   private int test3;

  

   public Student(String id) {
       // TODO Auto-generated constructor stub
      
       this.setStudent_id(id); // constructor where student id's will come
      
      
   }
  
   public double calcAverage(String id, int i, int j,int k) {
      
       double sum = (i + j + k);
       //System.out.println("Sum: "+sum);         
       double Avg = sum/3;
         
         
         
       String student_id = (String) id;

       displayInfo(student_id, i, j, k,Avg);  
      

       return Avg;
      
   }
  
   public double displayInfo(String student_id,int i,int j,int k,double avg) {
      
      
       System.out.println("Student ID: "+student_id);
       System.out.println("Test 1 score: "+i);
       System.out.println("Test 2 score: "+j);
       System.out.println("Test 3 score: "+k);
       System.out.println("Average :"+avg);
  
       //System.out.println("Student ID: "+student_id2);
      
       return 0;
   }

   public static void main(String[] args) {
       // TODO Auto-generated method stub
      
String std1 = (String) FC123;
String std2 = (String) FC456;
  
       Student FC123 = new Student(std1);
       FC123.calcAverage(std1,100,80,94);
      
       Student FC456 = new Student(std2);
       FC456.calcAverage(std2,78,92,80);
   }

   public int getTest3() {
       return test3;
   }

   public void setTest3(int test3) {
       this.test3 = test3;
   }

   public int getTest1() {
       return test1;
   }

   public void setTest1(int test1) {
       this.test1 = test1;
   }

   public int getTest2() {
       return test2;
   }

   public void setTest2(int test2) {
       this.test2 = test2;
   }

   public String getStudent_id() {
       return Student_id;
   }

   public void setStudent_id(String id) {
       Student_id = (String) id;
   }

}

my output :

Student ID: FC123
Test 1 score: 100
Test 2 score: 80
Test 3 score: 94
Average :91.33333333333333
Student ID: FC456
Test 1 score: 78
Test 2 score: 92
Test 3 score: 80
Average :83.33333333333333