=====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, "peter"); registerAStudent(roster, s4, "delco"); registerAStudent(roster, s5, "tobias"); registerAStudent(roster, s6, "monay"); 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/chas Section% 5contain Create woks SectionA+containite follmoix4 informatio C4tautSThe r oUMUuul uUformation department (e-4., "CSS" ) courseNumber (e.g., 451 ) e-41 utrsectonNumber (c4.1 1121 ) instructor (eg., "Bob" ) S4417 title. (ay.,"Teolato'lt-Jan' ) Use Section, objects aite keyr a/ HashMap/uite attached, Register class. Bof, Mike aalPeter shoullMKMP same Register class. Boc, Mike, and Peter should all Ce in same eduster class. ure and leter sito utthe same section. Everyonek.cue(hint secti 0tla Everyone, eke should be uudt enem secti on s