Using Java import data from a text file named fata.txt then create two Student o

ID: 673178 • Letter: U

Question

Using Java import data from a text file named fata.txt then create two Student objects with the following name(String), id(String), and gpa(double values:

S1: John, 1111, 3.5

S2: Jean,2222, 3.9

The Student class must be a subclass of a Person class. The Person class must have a name field and an id field and the Student class must have a gpa field. THe Student class must also implement an interface called CurveGPA. The interface forces the Student class to implement a curveGPA() method that would add to each exisiting GPA.

Display these two objects with the curved GPA values on the console using toString() method.

Explanation / Answer

public class Person {
String name,id;

public Person(String name, String id) {

   this.name = name;
   this.id = id;
}

/**
* @return the name
*/
public String getName() {
return name;
}

/**
* @param name the name to set
*/
public void setName(String name) {
this.name = name;
}

/**
* @return the id
*/
public String getId() {
return id;
}

/**
* @param id the id to set
*/
public void setId(String id) {
this.id = id;
}

/* (non-Javadoc)
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return "Person [name=" + name + ", id=" + id + "]";
}
}

Student.java

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

/**
* @author Srinivas Palli
*
*/
public class Student extends Person implements CurveGPA {

   public Student(String name, String id) {
       super(name, id);


   }

double gpa;

   /* (non-Javadoc)
   * @see java.lang.Object#toString()
   */
   @Override
   public String toString() {
       return "Student [gpa=" + gpa + ", name=" + name + ", id=" + id + "]";
   }

   @Override
   public void curveGPA(double gpa) {
this.gpa=gpa;

   }



   public static void main(String args[]){

       try {
   File file = new File("fata.txt");
   Scanner scanner = new Scanner(file);


   String line1=scanner.nextLine().split(":")[1].trim();
   String name1=line1.split(",")[0];
   String id1=line1.split(",")[1];
   double gpa1=Double.parseDouble(line1.split(",")[2]);
   Student student1=new Student(name1, id1);
   student1.curveGPA(gpa1);


   String line2=scanner.nextLine().split(":")[1].trim();
   String name2=line2.split(",")[0];
   String id2=line2.split(",")[1];
   double gpa2=Double.parseDouble(line2.split(",")[2]);
   Student student2=new Student(name2, id2);
   student2.curveGPA(gpa2);

   System.out.println("Student 1: "+student1);
   System.out.println("Student 2: "+student2);


   scanner.close();
   } catch (FileNotFoundException e) {
   e.printStackTrace();
   }



   }

}

fata.txt :

S1: John, 1111, 3.5
S2: Jean,2222, 3.9

output :

Student 1: Student [gpa=3.5, name=John, id= 1111]
Student 2: Student [gpa=3.9, name=Jean, id=2222]

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