import java.util.*; class person { Scanner n = new Scanner(System.in); int day, month, year, da, mo, ye; person() { String Name; int Age; } void todaydate() { day = 25; month = 10; year = 2020; } final double CalculateAge(int d1, int m1, int y1) { int d = day; int m = month; int y = year; if (d < d1) { m = m - 1; } if (m < m1) { y = y - 1; } double age = (double)(y - y1); return age; } } class Students extends person { Scanner n = new Scanner(System.in); ArrayList stu = new ArrayList(); ArrayList Name = new ArrayList(); ArrayList Course = new ArrayList(); ArrayList College = new ArrayList(); ArrayList RollNo = new ArrayList(); ArrayList Dob = new ArrayList(); ArrayList YOA = new ArrayList(); ArrayList Gender = new ArrayList(); ArrayList Ages = new ArrayList(); int count = 0; person p1 = new person(); Students() { stu.add("Roll No."); stu.add("Name"); stu.add("Course"); stu.add("College Name"); stu.add("Year of Add."); stu.add("Dob"); stu.add("Age"); stu.add("Gender"); } void create() { System.out.println("Enter data of all students one by one"); System.out.println(" Enter Name, Course, Gender each in different line, Enter Roll no, Year of admossion and Dob (dd mm yyyy format),"); String college = "PGDAV (DU)"; String insert = ""; int br = 0; int input; int inp; int inpu; double age; p1.todaydate(); do { insert = n.nextLine(); if (insert.equals("Quit") || insert.equals("quit")) { br = 1; } else { Name.add(insert); insert = n.nextLine(); Course.add(insert); College.add(college); insert = n.nextLine(); Gender.add(insert); input = n.nextInt(); RollNo.add(input); input = n.nextInt(); YOA.add(input); input = n.nextInt(); Dob.add(input); inp = n.nextInt(); Dob.add(inp); inpu = n.nextInt(); Dob.add(inpu); age = p1.CalculateAge(input, inp, inpu); Ages.add(age); count++; } } while (br == 0); } void display() { Iterator s1 = Name.iterator(); Iterator s2 = Course.iterator(); Iterator s3 = College.iterator(); Iterator s4 = RollNo.iterator(); Iterator s5 = YOA.iterator(); Iterator s6 = Dob.iterator(); Iterator s7 = Ages.iterator(); Iterator s8 = Gender.iterator(); System.out.println(stu); for (int i = 0; i < count; i++) { System.out.print(s4.next() + " "); System.out.print(s1.next() + " "); System.out.print(s2.next() + " "); System.out.print(s3.next() + " "); System.out.print(s5.next() + " "); System.out.print(s6.next() + "/" + s6.next() + "/" + s6.next() + " "); System.out.print(s7.next() + " "); System.out.print(s8.next()); System.out.println(""); } } } class Teacher extends person { Scanner n = new Scanner(System.in); ArrayList Names = new ArrayList(); ArrayList Tech = new ArrayList(); ArrayList Dept = new ArrayList(); ArrayList DOB = new ArrayList(); ArrayList Sallary = new ArrayList(); ArrayList Join = new ArrayList(); ArrayList Contact = new ArrayList(); ArrayList Ag = new ArrayList(); ArrayList gender = new ArrayList(); int ct = 0; int l = 0; person p2 = new person(); Teacher() { Tech.add("Name"); Tech.add(" Department"); Tech.add(" DOB"); Tech.add(" Sallary"); Tech.add(" Contact"); Tech.add(" Gender"); Tech.add(" Age"); Tech.add(" Year Of joining"); } void create() { System.out.println("Enter data of all Teachers one by one"); System.out.println("Enter data as Name, Deapartment and Gender seperated by line"); String insert = ""; int br = 0; do { insert = n.nextLine(); if (insert.equals("Quit") || insert.equals("quit")) { br = 1; } else { Names.add(insert); insert = n.nextLine(); Dept.add(insert); insert = n.nextLine(); gender.add(insert); ct++; } } while (br == 0); p2.todaydate(); System.out.println("Enter Date of Birth as (dd mm yyyy format), Sallary, year of joining and contact no."); int data; String dat; int date, dete; double age; for (int i = l; i < ct; i++) { data = n.nextInt(); DOB.add(data); date = n.nextInt(); DOB.add(date); dete = n.nextInt(); DOB.add(dete); data = n.nextInt(); Sallary.add(data); age = p2.CalculateAge(data, date, dete); Ag.add(age); data = n.nextInt(); Join.add(data); dat = n.nextLine(); Contact.add(dat); } l = ct; } void display() { Iterator n1 = Names.iterator(); Iterator n2 = Dept.iterator(); Iterator n3 = DOB.iterator(); Iterator n4 = Sallary.iterator(); Iterator n5 = Contact.iterator(); Iterator n6 = gender.iterator(); Iterator n7 = Join.iterator(); Iterator n8 = Ag.iterator(); System.out.println(Tech); for (int i = 0; i < ct; i++) { System.out.print(n1.next() + " "); System.out.print(n2.next() + " "); System.out.print(n3.next() + "/" + n3.next() + "/" + n3.next() + " "); System.out.print(n4.next() + " "); System.out.print("+91" + n5.next() + " "); System.out.print(n6.next() + " "); System.out.print(n8.next() + " "); System.out.print(n7.next() + " "); System.out.println(""); } } } public class Main { public static void main(String[] args) { Scanner n = new Scanner(System.in); Students stu = new Students(); Teacher tec = new Teacher(); int ch = 0; /* person p = new person(); p.todaydate();*/ while (ch == 0) { System.out.println("Enter 1 to add Students information"); System.out.println("Enter 2 to add Teachers Information"); System.out.println("Enter 3 to Exit"); int choice = n.nextInt(); switch (choice) { case 1: stu.create(); stu.display(); break; case 2: tec.create(); tec.display(); break; case 3: ch = 1; break; default: System.out.println("Enter valid choice"); } } System.out.println("$_$_$_THANKS_$_$_$"); } }