Question

Write a program in java that does the following:

1. Create a StudentRecord class that keeps the following information for a student: first name (String), last name (String), and balance (integer). Provide proper constructor, setter and getter methods.
2. Read the student information (one student per line) from the input file “csc272input.txt”. The information in the file is listed below. You can use it to generate the input file yourself, or use the original input file that is available alone with this midterm document.

C12345 Abex Mary 900

F98733 Alberto Peter 80

C93832 Walter Mary 200

C32334 Lee Kate 1000

F32145 Rockey Keith 20

F09121 Shaffer John 1000

F94321 Lewis Stephen 100

C83243 Chandler Lily 200

3. Uses a HashMap to store the student information. The HashMap’s key should be the student ID (e.g. C12345, F98733, etc.), and the value should be a StudentRecord object.
4. In your program, design a function called printHashMap that takes the HashMap and display the student information in it in the same format as the input file. Invoke this function to display the HashMap generated in part (c).
5. Copy all the student IDs, which are the HashMap’s keys, into a String array from the HashMap.
6. Merge sort the student ID String array to alphabetical ascending order (A à Z).
7. Overload the function printHashMap from part (d) to take the HashMap and a String array with sorted key, then display all the student information in sorted order. Invoke this function to display the student information in the HashMap using the sorted student ID array from step (f).

Answer 1

Hi there, as you didn't specify which subaprt to solve i have solve first two subpart as we are allocated with limited time that's why only two parts were possible to solve, for remaining parts repost.

If you find any difficuly with solution do comment I'll be happy to helpnyour further.

If you like my solution please rate it.

I have used eclipse ide

code:

a)

this code goes into StudentRecord file

public class StudentRecord{
    private String firstName;
    private String lastName;
    private int balance;

    public StudentRecord(String firstName, String lastName, int balance) {
        this.firstName = firstName;
        this.lastName = lastName;
        this.balance = balance;
    }

    public String getfirstName() {
        return firstName;
    }
    public String getlastName() {
        return lastName;
    }
    public int getbalance() {
        return balance;
    }
    public String getfullName() {
        return firstName +" " + lastName;
    }
    public void setfirstName(String firstName) {
        this.firstName = firstName;
    }
    public void setlastName(String lastName) {
        this.lastName = lastName;
    }
    public void setbalance(int balance) {
        this.balance = balance;
    }
}

Main class

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        
        System.out.println("Enter Student First Name: ");
        String firstName = sc.nextLine();

        System.out.println("Enter Student Last Name: ");
        String lastName = sc.nextLine();
        
        System.out.println("Enter Student balance: ");
        int balance = sc.nextInt();

        StudentRecord student = new StudentRecord(firstName,lastName,balance);

        System.out.println("Student Information\n");
        System.out.println("FirstName: " + student.getfirstName()  + " " + "LastName: "+ student.getlastName() +" " + "balance: " + student.getbalance());
        System.out.println("FullName: " + student.getfullName());
    }
}

Screenshot

b).

code

public class StudentRecord{
    private String firstName;
    private String lastName;
    private String ID;
    private int balance;

    public StudentRecord(String firstName, String lastName, String ID, int balance) {
        this.firstName = firstName;
        this.lastName = lastName;
        this.ID = ID;
        this.balance = balance;
    }

    public String getfirstName() {
        return firstName;
    }
    public String getlastName() {
        return lastName;
    }
    public String getStudentID() {
        return ID;
    }
    public int getbalance() {
        return balance;
    }
    public String getfullName() {
        return firstName +" " + lastName;
    }
    public void setfirstName(String firstName) {
        this.firstName = firstName;
    }
    public void setlastName(String lastName) {
        this.lastName = lastName;
    }
    public void setStudentID(String ID) {
        this.ID = ID;
    }
    public void setbalance(int balance) {
        this.balance = balance;
    }
}

Main class

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) throws FileNotFoundException {
        //change path according to you.
        File file = new File("D:\\Geekster\\csc272input.txt"); 
        Scanner sc = new Scanner(file); 
        String[] splitStr = null;
      

        System.out.println("Student Information\n");
        while (sc.hasNextLine()) {
                String get = sc.nextLine();
                splitStr = get.split("\\s+");
        StudentRecord student = new StudentRecord(splitStr[0],splitStr[1],splitStr[2],Integer.parseInt(splitStr[3]));

        System.out.println(student.getStudentID() + " " + student.getfirstName()  + " " + 
        student.getlastName() + " " + student.getbalance());
       // System.out.println("FullName: " + student.getfullName());
        }
    }
}

Screenshot