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Student_Teacher.java

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import java.util.*;

class Person

{

String name, des;

int ID, ph_no;

Person(){}

public String toString()

{

return null;

}

}

class Students extends Person

{

String name, des;

int ID, ph_no;

Students(String name, String des, int ID, int ph_no)

{

this.name = name;

this.des = des;

this.ID =ID;

this.ph_no = ph_no;

}

public String toString()

{

return ("Name : " + name + "\nDesignation : " + des + "\nID : " + ID + "\nPhone Number : " + ph_no);

}

}

class Teachers extends Person

{

String name, des;

int ID, ph_no;

Teachers(String name, String des, int ID, int ph_no)

{

this.name = name;

this.des = des;

this.ID =ID;

this.ph_no = ph_no;

}

public String toString()

{

return ("Name : " + name + "\nDesignation : " + des + "\nID : " + ID + "\nPhone Number : " + ph_no);

}

}

class Student_Teacher extends Person

{

public static void main(String args[])

{

String name, des;

int ID, ph_no;

Scanner sc = new Scanner(System.in);

Person p;

System.out.println("\nEnter number of Students : ");

int ns = sc.nextInt();

Person ps[] = new Person[ns];

for(int i = 0; i<ns; i++)

{

System.out.print("\nFor Student " + (i+1));

System.out.println("\nEnter Name : ");

name = sc.next() + sc.nextLine();

System.out.println("Enter Designation : ");

des = sc.next() + sc.nextLine();

System.out.println("Enter ID : ");

ID = sc.nextInt();

System.out.println("Enter Phone Number : ");

ph_no = sc.nextInt();

ps[i] = new Students(name, des, ID, ph_no);

}

for(int i = 0; i<ns; i++)

{

System.out.println("\nStudent " + (i+1) + " :");

System.out.println(ps[i].toString());

}

System.out.println("\nEnter number of Teachers : ");

int nt = sc.nextInt();

Teachers t[] = new Teachers[nt];

for(int i = 0; i<nt; i++)

{

System.out.print("\nFor Teacher " + (i+1));

System.out.println("\nEnter Name : ");

name = sc.next() + sc.nextLine();

System.out.println("Enter Designation : ");

des = sc.next() + sc.nextLine();

System.out.println("Enter ID : ");

ID = sc.nextInt();

System.out.println("Enter Phone Number : ");

ph_no = sc.nextInt();

t[i] = new Teachers(name, des, ID, ph_no);

}

for(int i = 0; i<nt; i++)

{

System.out.println("\nTeacher " + (i+1) + " :");

System.out.println(t[i].toString());

}

}

}