Java expert please help me the program below? Here is the requirement. ===== Reg

Question

Java expert please help me the program below? Here is the requirement.

=====Register.java====

import java.util.ArrayList;
import java.util.HashMap;

public class Register {

   public static void main(String[] args) {
       HashMap> roster = new HashMap<>();
       Section s1 = new Section("CSC", 151, 0001, "Bob Charlotte", "Intro to Java");
       Section s2 = new Section("CSC", 151, 0001, "Bob C", "Introduction to Java");
       Section s3 = new Section("CSC", 151, 0001, "B Charlotte", "Java Introduction");
       Section s4 = new Section("CSC", 151, 0002, "Bob C", "Introduction to Java");
       Section s5 = new Section("DBA", 151, 0001, "Bob Charlotte", "SQL 1");
       Section s6 = new Section("CSC", 251, 0001, "Bob Charlotte", "Adv Java");
      
       registerAStudent(roster, s1, "bob");
       registerAStudent(roster, s2, "mike");
       registerAStudent(roster, s3, "delco");
       registerAStudent(roster, s4, "lassie");
       registerAStudent(roster, s5, "freckles");
       registerAStudent(roster, s6, "zipper");
      
       System.out.println(roster);
   }
  
   public static void registerAStudent(HashMap> roll, Section s, String student) {
       ArrayList victims = roll.get(s);
       if (victims == null) {
           victims = new ArrayList<>();
           victims.add(student);
       }
       else {
           victims.add(student);
       }
       roll.put(s, victims);
   }

}

Create a Section that contains met int sectonWun instructor (e.g., Bal use Section obieck as the egister ake an section. Everyone eke skou SAouyed all be uv the same

Explanation / Answer

public class Section {

       // class Members

       String department;

       int courseNumber;

       int sectionNumber;

       String instructor;

       String title;

       // class Constructor

  Section(String department , int courseNumber , int sectionNumber , String instructor , String title){

              this.department = department;

              this.courseNumber = courseNumber;

              this.sectionNumber = sectionNumber;

              this.instructor = instructor;

              this.title = title;

        }      

}

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