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public class LabProgram { public static void main(String args[]) { Course cis162 = new Course();       int beforeCount;       String toDrop;              // Example students for testing       cis162.addStudent(new Student("Henry", "Nguyen", 3.5));          cis162.addStudent(new Student("Brenda", "Stern", 2.0));        cis162.addStudent(new Student("Lynda", "Robison", 3.2));        cis162.addStudent(new Student("Sonya", "King", 3.9));        toDrop = "Stern";              beforeCount = cis162.countStudents();       cis162.dropStudent(toDrop);   System.out.println("Course size: " + beforeCount + " students"); System.out.println("Course size after drop: " + cis162.countStudents() + " students"); }     }

public class LabProgram { public static void main(String args[]) { Course cis162 = new Course();       int beforeCount;       String toDrop;              // Example students for testing       cis162.addStudent(new Student("Henry", "Nguyen", 3.5));          cis162.addStudent(new Student("Brenda", "Stern", 2.0));        cis162.addStudent(new Student("Lynda", "Robison", 3.2));        cis162.addStudent(new Student("Sonya", "King", 3.9));        toDrop = "Stern";              beforeCount = cis162.countStudents();       cis162.dropStudent(toDrop);   System.out.println("Course size: " + beforeCount + " students"); System.out.println("Course size after drop: " + cis162.countStudents() + " students"); }     }

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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public class LabProgram {
public static void main(String args[]) {
Course cis162 = new Course();
      int beforeCount;
      String toDrop;
      
      // Example students for testing
      cis162.addStudent(new Student("Henry", "Nguyen", 3.5));   
      cis162.addStudent(new Student("Brenda", "Stern", 2.0)); 
      cis162.addStudent(new Student("Lynda", "Robison", 3.2)); 
      cis162.addStudent(new Student("Sonya", "King", 3.9)); 
      toDrop = "Stern";
      
      beforeCount = cis162.countStudents();
      cis162.dropStudent(toDrop);
 
System.out.println("Course size: " + beforeCount + " students");
System.out.println("Course size after drop: " + cis162.countStudents() + " students");
}    
}
import java.text.DecimalFormat;
 
// Class representing a student
public class Student {
 
private String first;  // first name
private String last;   // last name
private double gpa;    // grade point average
 
// Student class constructor
public Student(String f, String l, double g) {
first = f;  // first name
last = l;   // last name
gpa = g;    // grade point average
}
 
public double getGPA() {
return gpa;
}
 
public String getLast() {
return last;
}
 
   // Returns a String representation of the Student object, with the GPA formatted to one decimal
public String toString() {
DecimalFormat fmt = new DecimalFormat("#.0");
return first + " " + last + " " + fmt.format(gpa);
}
}
Complete the Course class in file Course.java by implementing the dropStudent () method, which removes a student (by last name) from the course roster. If the student is not found in the course roster, no student should be dropped. Assume all students have distinct last names. Given classes: • Class LabProgram contains the main method for testing the program. • Class Course represents a course, which contains an ArrayList of Student objects as a course roster. (Type your code in here.) • Class Student represents a classroom student, which has three private fields: first name, last name, and GPA. (Hint: getLast() returns the last name field.) Note: For testing purposes, different student values will be used. Ex. For the following students: Henry Nguyen 3.5. Brenda Stern 2.0 Lynda Robison 3.2 Sonya King 3.9. the output for dropping Stern is: Course size: 4 students Course size after drop: 3 students
Transcribed Image Text:Complete the Course class in file Course.java by implementing the dropStudent () method, which removes a student (by last name) from the course roster. If the student is not found in the course roster, no student should be dropped. Assume all students have distinct last names. Given classes: • Class LabProgram contains the main method for testing the program. • Class Course represents a course, which contains an ArrayList of Student objects as a course roster. (Type your code in here.) • Class Student represents a classroom student, which has three private fields: first name, last name, and GPA. (Hint: getLast() returns the last name field.) Note: For testing purposes, different student values will be used. Ex. For the following students: Henry Nguyen 3.5. Brenda Stern 2.0 Lynda Robison 3.2 Sonya King 3.9. the output for dropping Stern is: Course size: 4 students Course size after drop: 3 students
1 import java.util.ArrayList; 2 public class Course { 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 } Current file: Course.java private ArrayList<Student> roster; //collection of Student objects public Course() { roster = new ArrayList<Student> (); } public void dropStudent (String last) { /* Type your code here */ } public void addStudent (Student s) { roster.add(s); } public int countStudents() { return roster.size(); }
Transcribed Image Text:1 import java.util.ArrayList; 2 public class Course { 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 } Current file: Course.java private ArrayList<Student> roster; //collection of Student objects public Course() { roster = new ArrayList<Student> (); } public void dropStudent (String last) { /* Type your code here */ } public void addStudent (Student s) { roster.add(s); } public int countStudents() { return roster.size(); }
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