Student Veritas Lab
import java.util.Scanner;
public class StudentVeritasLab {
public static void main(String[] args) {
//Congratulations on making it through your 9-round interview session with Veritas!
//You have been hired to create a database system that can store the information of students
//by using the Student class and an array of Students.
//Your project will consist of a UI that can do the following:
//1. List the information of all students in the database (PROVIDED FOR YOU)
//2. List the information of one specific student, given an ID
//3. Add a new student to the database
//4. Change the information of a student, given an ID
//To make things easier, since Veritas only hired one developer (you), we will be extremely
//lazy and simply use an array to hold the information of the students, instead of following
//proper CRUD protocols.
//Option 1 (showAllStudents) has been fully implemented as an example.
//Study it carefully, then implement options 2, 3, and 4.
//Have fun!
Scanner scanner = new Scanner(System.in);
Student[] database = new Student[1000];
int studentCount = 0;
//Pre-loaded students
database[0] = new Student("Timmy", "Turnip", 95, 183);
database[1] = new Student("Poppy", "Poppers", 76, 217);
database[2] = new Student("God Emperor", "Nydegger", 100, 798);
database[3] = new Student("Mimi", "Mimoto", 47, 490);
studentCount = 4;
boolean runTerminal = true;
System.out.println("Welcome, user. What would you like to do?");
while(runTerminal)
{
System.out.println("1. Show all students.");
System.out.println("2. Show one student by ID.");
System.out.println("3. Add a new student.");
System.out.println("4. Change a student's info.");
System.out.println("5. Exit.");
int input = scanner.nextInt();
if(input == 1)
{
showAllStudents(database, studentCount);
}
else if(input == 2)
{
//YOUR CODE: Find and display a student by ID.
//Hint: Loop through the array up to studentCount.
//Compare each student's ID (using your getter) to the ID the user entered.
//If you find a match, print their info. If no match, let the user know.
}
else if(input == 3)
{
//YOUR CODE: Add a new student to the database.
//Hint: Prompt the user for firstName, lastName, score, and id.
//Create a new Student and store it at database[studentCount].
//Don't forget to increment studentCount!
//Scanner tip: after nextInt(), call scanner.nextLine() before reading a String.
}
else if(input == 4)
{
//YOUR CODE: Change a student's information.
//Hint: First find the student by ID (similar to option 2).
//Then ask the user which field to change (firstName, lastName, or score).
//Use the appropriate setter to update it.
}
else if(input == 5)
{
runTerminal = false;
}
else
{
System.out.println("Invalid input."); //Keep it school appropriate :)
}
}
System.out.println("Until next time.");
}
//=========================================================
// EXAMPLE METHOD: showAllStudents (provided for you)
// Study how it uses studentCount and calls getInfo().
//=========================================================
public static void showAllStudents(Student[] database, int studentCount)
{
if(studentCount == 0)
{
System.out.println("No students in the database.");
return;
}
System.out.println("--- All Students ---");
for(int i = 0; i < studentCount; i++)
{
System.out.println(database[i].getInfo());
}
System.out.println("--------------------");
}
public static class Student
{
private String firstName;
private String lastName;
private int score;
private int id;
//Constructor
public Student(String fn, String ln, int s, int id)
{
this.firstName = fn;
this.lastName = ln;
this.score = s;
this.id = id;
}
// --- Example Getter ---
public String getFirstName()
{
return this.firstName;
}
// --- Example Setter ---
public void setFirstName(String fn)
{
this.firstName = fn;
}
//1. Create getters for lastName, score, and id.
// (Follow the pattern of getFirstName above.)
//2. Create setters for lastName and score.
// (Follow the pattern of setFirstName above.)
// Note: There is no setter for id — an ID should not change.
//3. Create a getInfo() method that returns a String with all student info.
// Example output: "Timmy Turnip | Score: 95 | ID: 183"
}
}
