Chapter 12, Problem 15PP

Program Plan Intro

Display student class details “HashMap” and “ArrayList”

Program Plan:

• Import required package.
• Define “StudentIDsListTest” class.
  • Define main function.
    • Create hashmap for student ID and course number.
    • Create an object for scanner class.
    • Declare required variables.
    • Display prompt statement.
    • Performs “do-while” loop. This loop will execute until “studID” is not equal to “-1”.
      • Read student ID from user.
      • If student ID is not equal to “-1”, then read course number from user.
        • If the student ID is contains in “students” list, then
        • • Create array list named “class_List”.
          • Add the course number to “class_List” using “add” method.
          • Map the student ID to course number using “put” method.
        • Otherwise,
        • • Create array list named “class_List”.
          • If the course number is not in the class list, then add the given course number to “class_List” using “add” method.
    • Display all the classes for each student using “for” loop.
      • Create array list named “stud_List”.
      • Display course number for corresponding student ID.