Please solve the errors in the program coming

Question

import java.util.Scanner;

class student{

    int enrollment_number;

    String student_name;

    char gender;

}

class Student_Info

{

    public static void main(String args[])

    {

        system.out.println("Enter student_name");

        

        String name=sc.nextLine();

        

        System.out.println("Enter your enrollment_number.");

        

        int roll=sc.nextInt();

        

        System.out.println("Enter your gender");

        int ge=sc.nextLine();

        

        System.out.println("Name - "+name);

        System.out.println("Roll No. - "+roll);

        System.out.println("Class - "+ gender);

    }

}

Answer 1

/******************************************************************************/

import java.util.Scanner;

class student{

    int enrollment_number;

    String student_name;

    char gender;

}

 class Main

{

    public static void main(String args[])

    {  
         
         Scanner sc = new Scanner(System.in);

        System.out.println("Enter student_name");
        String name=sc.nextLine();

        System.out.println("Enter your enrollment_number.");
        int roll=sc.nextInt();

        System.out.println("Enter your gender");
        char ge=sc.next().charAt(0);

        

        System.out.println("Name - "+name);

        System.out.println("Roll No. - "+roll);

        System.out.println("Class - "+ ge);

    }

}

Answer 2

I have a question, why have you declared extra variables in main function when there are class varibles ?

Scanner class won't help in taking string input, use java.util.*

most importantly you have to make class object to use class.

import java.util.*;

class student{

    int enrollment_number;

    String student_name;

    char gender;

}

public class Student_Info

{

public static void main(String[] args)

{

    Scanner sc=new Scanner(System.in);

    

    student s=new student();

    

    System.out.print("Enter student_name :");

        s.student_name=sc.nextLine();

        

        System.out.print("Enter your enrollment_number :");

        s.enrollment_number=sc.nextInt();

     

        System.out.print("Enter your gender :");

        s.gender=sc.next().charAt(0);

        

        System.out.println();

        

        System.out.println("Name - "+ s.student_name);

        System.out.println("Enrollment Number. - "+ s.enrollment_number);

        System.out.println("Gender - "+ s.gender);

}

}

Answer 3

Your code has plenty of problems (wrong name used, undeclared identifiers, mixed way of reading input, wrong class name used), so I just rewrote everything. Please, read why you shouldn't mix nextLine() and (nextInt() or nextDouble()) here.

import java.util.Scanner;

class Student
{
    private String _name;
    private int _enrollmentNumber;
    private char _gender;
    
    public String getName() { return _name; }
    public int getEnrolmentNumber() { return _enrollmentNumber; }
    public char getGender() { return _gender; }
    
    public Student(String name, int enrolmentNumber, char gender)
    {
        _name = name;
        _enrollmentNumber = enrolmentNumber;
        _gender = gender;
    }
    
    public void print()
    {
        System.out.println("Name: " + _name);
        System.out.println("Enrolment number: " + _enrollmentNumber);
        System.out.println("Gender: " + _gender);
    }
}

class Main
{
    public static void main(String args[])
    {
        Scanner scanner = new Scanner(System.in);

        System.out.print("Student name: ");
        String name = scanner.nextLine();

        System.out.print("Enrollment number: ");
        int number = Integer.valueOf(scanner.nextLine());
        
        System.out.print("Gender (m/f): ");
        char gender = scanner.nextLine().charAt(0);
        
        Student student = new Student(name, number, gender);
        student.print();
    }
}

Answer 4

There is a lot of errors showing you didn't try to find them.

Follow is the basic correction.

Please do your self more and more before ask.
 

---

import java.util.Scanner;

class student{

    int enrollment_number;

    String student_name;

    char gender;

}

public class Student_Info

{

    public static void main(String args[])

    {

        System.out.println("Enter student_name");

        Scanner sc = new Scanner(System.in); //############

        String name=sc.nextLine();

        

        System.out.println("Enter your enrollment_number.");

        

        int roll=sc.nextInt();

        

        System.out.println("Enter your gender");

        int gender=sc.nextInt(); //############

        

        System.out.println("Name - "+name);

        System.out.println("Roll No. - "+roll);

        System.out.println("Class - "+ gender);

    }

}

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