For the question below, use the following class definition. import java.text.Dec

Question

For the question below, use the following class definition. import java.text.DecimalFormat; public class Student { private String name; private String major; private double gpa; private int hours; public Student(String newName, String newMajor, double newGPA, int newHours) { name = newName; major = newMajor; gpa = newGPA; hours = newHours; } public String toString( ) { DecimalFormat df = new DecimalFormat("xxxx"); // xxxx needs to be replaced return name + " " + major + " " + df.format(gpa) + " " + hours } } Which of the following could be used to instantiate a new Student s1? 1. Student s1 = new Student( ); 2. new Student s1 = ("Jane Doe", "Computer Science", 3.333, 33); 3. Student s1 = new Student("Jane Doe", "Computer Science", 3.333, 33); 4. new Student(s1); 5. s1 = new Student( );

Explanation / Answer

import java.text.DecimalFormat;

public class Student {
   private String name;
   private String major;
   private double gpa;
   private int hours;

   public Student(String newName, String newMajor, double newGPA, int newHours) {
       name = newName;
       major = newMajor;
       gpa = newGPA;
       hours = newHours;
   }

   public String toString() {
       DecimalFormat df = new DecimalFormat("xxxx");
       return name + " " + major + " " + df.format(gpa) + " " + hours;
       // xxxx needs to be replaced return name + " " + major + " " +
       // df.format(gpa) + " " + hours
   }

   public static void main(String args[]) {
       Student s1 = new Student("Jane Doe", "Computer Science", 3.333, 33); // valid
       System.out.println(s1.toString());

   }

}

//Note: please find below explanation on the object creation

1. Student s1 = new Student( ); // not valid since we don't have a default constructor
2. new Student s1 = ("Jane Doe", "Computer Science", 3.333, 33); //not valid
3. Student s1 = new Student("Jane Doe", "Computer Science", 3.333, 33); // valid since we have the constructor
4. new Student(s1); //not valid since we dont have the constructor with Student para
5. s1 = new Student( ); //not valid since we dont have the default constructor

----------------output---------

Jane Doe
Computer Science
xxxx3
33

------------output-----------

//Note: feel free to as question/doubts. God bless you!!

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