Java: Accepts students name, id, and marks and display the highest score and the lowest score

Java Basic: Exercise-245 with Solution

Highest and Lowest Scores from Student Data

Write a Java program that accepts students' names, ids, and marks and displays their highest and lowest scores.

The student name and id are all strings of no more than 10 characters. The score is an integer between 0 and 100.

Visual Presentation:

Sample Solution:

Java Code:

// Importing the Scanner class to read input from the user
import java.util.Scanner;

// Defining the Student class to represent student information
class Student {
    // Instance variables to store student name, ID, and score
    String name;
    String stu_id;
    int score;

    // Default constructor with default values
    public Student() {
        this(" ", " ", 0);
    }

    // Parameterized constructor to initialize instance variables with given values
    public Student(String initName, String initId, int initScore) {
        name = initName;
        stu_id = initId;
        score = initScore;
    }
}

// Main class named "Main"
public class Main {
    // Main method, the entry point of the program
    public static void main(String[] args) {
        // Creating a Scanner object to read input from the user
        Scanner in = new Scanner(System.in);

        // Prompting the user to input the number of students
        System.out.println("Input number of students:");

        // Reading the number of students from the user and trimming excess whitespaces
        int n = Integer.parseInt(in.nextLine().trim());

        // Prompting the user to input Student Name, ID, Score
        System.out.println("Input Student Name, ID, Score:");

        // Creating Student objects to store information about the students
        Student stu = new Student();
        Student max = new Student();
        Student min = new Student(" ", " ", 100);

        // Loop to read information about each student
        for (int i = 0; i < n; i++) {
            // Reading student name, ID, and score from the user
            stu.name = in.next();
            stu.stu_id = in.next();
            stu.score = in.nextInt();

            // Checking if the current student has the highest score
            if (max.score < stu.score) {
                max.name = stu.name;
                max.stu_id = stu.stu_id;
                max.score = stu.score;
            }

            // Checking if the current student has the lowest score
            if (min.score > stu.score) {
                min.name = stu.name;
                min.stu_id = stu.stu_id;
                min.score = stu.score;
            }
        }

        // Printing the name and ID of the highest score and the lowest score students
        System.out.println("name, ID of the highest score and the lowest score:");
        System.out.println(max.name + " " + max.stu_id);
        System.out.println(min.name + " " + min.stu_id);

        // Closing the Scanner to release system resources
        in.close();
    }
} 

Sample Output:

Input number of students:
3
Input Student Name, ID, Score:
Devid v1 72
Peter v2 68
Johnson v3 85
name, ID of the highest score and the lowest score:
Johnson v3
Peter v2

Flowchart:

Java Code Editor:

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