Program For Array Of Object

import java.util.*;
class Student
{
    String name;
    int id,p,c,m,total;
 
    void accept()
    {
        Scanner sc = new Scanner(System.in);
        System.out.print("\nEnter name: ");
        name = sc.next();

        System.out.print("Enter ID: ");
        id = sc.nextInt();

        System.out.print("Enter Physics marks: ");
        p = sc.nextInt();

        System.out.print("Enter Chemistry marks: ");
        c = sc.nextInt();

        System.out.print("Enter Maths marks: ");
        m = sc.nextInt();

        total = p+c+m;
    }

    void display()
    {
        System.out.print("\nName:"+name+"   ID:"+id+"   Physics:"+p+"  Chemistry:"+c+"   Maths:"+m+"   Total:"+total);      
    }
 
    static void sort_marks(Student s[])
    {
        int n = s.length;
        Student temp = new Student();

        for(int i=1; i<n; i++)
        {
            for(int j=0; j<(n-i); j++)
            {
                if(s[j].total<s[j+1].total)
                {
                    temp =s[j];
                    s[j] =s[j+1];
                    s[j+1]=temp;
                }
            }
        }
    }
 
    static void sort_name(Student s[])
    {
        int n = s.length;
        Student temp = new Student();

        for(int i=1; i<n; i++)
        {
            for(int j=0; j<(n-i); j++)
            {
                if(s[j].name.compareTo(s[j+1].name)>0)
                {
                    temp =s[j];
                    s[j] =s[j+1];
                    s[j+1]=temp;
                }
            }
        }
    }
}

class ArrayObjectDemo
{
    public static void main(String soham[])
    {
        Scanner sc = new Scanner(System.in);
        System.out.print("\nEnter number of students: ");
        int n = sc.nextInt();

        Student s[]=new Student[n];
       
        for(int i=0; i<=(n-1); i++)
        {
System.out.print("\nEnter Details for Student "+(i+1));
            s[i] = new Student();
            s[i].accept();
        }
     
        //Sorted according to total marks
        Student.sort_marks(s);
        System.out.print("\nSorted according to total marks: ");
        for(int i=0; i<=(n-1); i++)
        {
            s[i].display();
        }
        System.out.println();

        //Sorted according to name
        Student.sort_name(s);
        System.out.print("\nSorted according to name: ");
        for(int i=0; i<=(n-1); i++)
        {
            s[i].display();
        }
        System.out.println();
    }
}

Output: 

Enter number of students: 3

Enter Details for Student 1
Enter name: ABC
Enter ID: 101
Enter Physics marks: 90
Enter Chemistry marks: 70
Enter Maths marks: 80

Enter Details for Student 2
Enter name: XYZ
Enter ID: 102
Enter Physics marks: 80
Enter Chemistry marks: 70
Enter Maths marks: 80

Enter Details for Student 3
Enter name: PQR
Enter ID: 103
Enter Physics marks: 90
Enter Chemistry marks: 70
Enter Maths marks: 60

Sorted according to total marks:
Name:ABC   ID:101   Physics:90   Chemistry:70   Maths:80   Total:240
Name:XYZ   ID:102   Physics:80   Chemistry:70   Maths:80   Total:230
Name:PQR   ID:103   Physics:90   Chemistry:70   Maths:60   Total:220

Sorted according to name:
Name:ABC   ID:101   Physics:90   Chemistry:70   Maths:80   Total:240
Name:PQR   ID:103   Physics:90   Chemistry:70   Maths:60   Total:220
Name:XYZ   ID:102   Physics:80   Chemistry:70   Maths:80   Total:230