My Practical Files for Java

Practical10.java

import java.util.Scanner;

class Trip {
    String source, destination;
    String startDate;
    int noOfDays;

    Trip(String s, String d, String sd, int nod) {
        source = s;
        destination = d;
        startDate = sd;
        noOfDays = nod;
    }

    static Trip bookNow(String s, String d, String sd, int nod) {
        Trip trip = new Trip(s, d, sd, nod);
        return trip;
    }

    void showDetail() {
        System.out.println("From: " + source);
        System.out.println("To: " + destination);
        System.out.println("Start date: " + startDate);
        System.out.println("Number of days: " + noOfDays);
    }
}

public class Practical10 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        System.out.print("Enter source: ");
        String from = sc.nextLine();

        System.out.print("Enter destination: ");
        String to = sc.nextLine();

        System.out.print("Enter start date: ");
        String date = sc.nextLine();

        System.out.print("Enter number of days: ");
        int noOfDays = sc.nextInt();

        Trip trip = Trip.bookNow(from, to, date, noOfDays);

        trip.showDetail();
    }
}

Practical11.java

class Address {
  String city;
  int pin;

  void displayAddress() {
    System.out.println("City: " + city);
    System.out.println("Pin: " + pin);
  }
}

class Biodata extends Address {
  String name, qualification, dateOfBirth;

  Biodata(String n, String q, String dob) {
    name = n;
    qualification = q;
    dateOfBirth = dob;
  }

  void display() {
    System.out.println("Name: " + name);
    System.out.println("Qualification: " + qualification);
    System.out.println("Date of birth: " + dateOfBirth);
    displayAddress();
  }
}

public class Practical11 {
  public static void main(String[] args) {
    Biodata p1 = new Biodata("Usman", "Diploma", "12/7/2005");

    p1.city = "Surat";
    p1.pin = 395009;

    p1.display();
  }
}

Practical11B.java

class Vehicle {
  int id, speed;
}

class Bike extends Vehicle {
  Bike(int id, int speed) {
    super.id = id;
    super.speed = speed;
  }

  void display() {
    System.out.println("ID: " + super.id);
    System.out.println("Speed: " + super.speed);
  }
}

public class Practical11B {
  public static void main(String[] args) {
    Bike bike = new Bike(70, 88);
    bike.display();
  }
}

Practical12.java

class Student
{
  String name;
  int roll, examNo;

  Student()
  {
    roll = 4;
    name = "Usman";
    examNo = 3;
  }
}

class Exam extends Student
{
  int m1, m2, m3;
}

class Result extends Exam
{
  double total, percent;

  Result(int m1, int m2, int m3)
  {
    super.m1 = m1;
    super.m2 = m2;
    super.m3 = m3;
  }

  void calculate()
  {
    total = super.m1 + super.m2 + super.m3;
    percent = (total / 300) * 100;
  }
}

public class Practical12
{
  public static void main(String[] args)
  {
    Result result = new Result(90, 80, 10);
    result.calculate();
    System.out.println("Name: " + result.name);
    System.out.println("Roll: " + result.roll);
    System.out.println("Exam no: " + result.examNo);
    System.out.println("Total: " + result.total);
    System.out.println("Percent: " + result.percent + "%");
  }
}

Practical12B.java

class Grandfather
{
  String surname, nationality;
}

class Father extends Grandfather
{
  String name;
}

class Son extends Father
{
  Son()
  {
    name = "Usman";
    surname = "Sabuwala";
    nationality = "Indian";
  }
}

public class Practical12B
{
  public static void main(String[] args)
  {
    Son s1 = new Son();
    System.out.println("Name: " + s1.name);
    System.out.println("Surname: " + s1.surname);
    System.out.println("Nationality: " + s1.nationality);
  }
}

Practical13.java

interface PrintData
{
  void print();
}

class PrintInt implements PrintData
{
  public void print()
  {
    System.out.println("Print Int " + 10);
  }
}

class PrintFloat implements PrintData
{
  public void print()
  {
    System.out.println("Print Float " + 10.55);
  }
}

class PrintChar implements PrintData
{
  public void print()
  {
    System.out.println("Print Char " + 'f');
  }
}

class Practical13
{
  public static void main(String[] args)
  {
    PrintInt pi = new PrintInt();
    PrintFloat pf = new PrintFloat();
    PrintChar pc = new PrintChar();

    pi.print();
    pf.print();
    pc.print();
  }
}

Practical13B.java

interface Animal
{
  void food();
}

class Dog implements Animal
{
  public void food()
  {
    System.out.println("Dog");
  }
}

class Lion implements Animal
{
  public void food()
  {
    System.out.println("Lion");
  }
}

public class Practical13B
{
  public static void main(String[] args)
  {
    Dog d = new Dog();
    Lion l = new Lion();

    d.food();
    l.food();
  }
}

Practical14.java

abstract class Shape
{
  public void area()
  {
    System.out.println("Area for a shape");
  }
}

class Triangle extends Shape
{
  double base, height;

  Triangle()
  {
    base = 10;
    height = 50;
  }

  public void area()
  {
    super.area();
    System.out.println("Triangle: " + (double) (.5 * base * height));
  }
}

class Rectangle extends Shape
{
  double width, height;

  Rectangle()
  {
    width = 10;
    height = 10;
  }

  public void area()
  {
    super.area();
    System.out.println("Rectangle: " + (double) (width * height));
  }
}

class Circle extends Shape
{
  double radius;

  Circle()
  {
    radius = 20;
  }

  public void area()
  {
    super.area();
    System.out.println("Circle: " + (double) (Math.PI * radius * radius));
  }
}

public class Practical14
{
  public static void main(String[] args)
  {
    Triangle t = new Triangle();
    Rectangle r = new Rectangle();
    Circle c = new Circle();

    t.area();
    r.area();
    c.area();
  }
}

Practical15.java

abstract class Product
{
  int product_id;

  abstract void ShowPrice();

  abstract void ShowBrand();
}

class MobilePhone extends Product
{
  String brand;

  void ShowBrand()
  {
    System.out.println("Brand: " + brand);
  }

  void ShowPrice()
  {
  }
}

class Iphone extends MobilePhone
{
  int price;

  void ShowPrice()
  {
    System.out.println("Price: " + price);
  }
}

public class Practical15
{
  public static void main(String[] args)
  {
    Iphone iphone = new Iphone();
    iphone.product_id = 1;
    iphone.brand = "Apple";
    iphone.price = 999;

    if (iphone.product_id == 1)
    {
      iphone.ShowPrice();
      iphone.ShowBrand();
    }
  }
}

Practical17.java

import java.util.Scanner;

class Practical17
{
    public static void main(String[] args)
    {
        // a();
        b();
    }

    static void b()
    {
        try
        {
            Scanner sc = new Scanner(System.in);
            int pnLength = sc.nextLine().length();
            if (pnLength != 10)
                throw new Exception("Phone number should only be 10 characters long");
        } catch (Exception e)
        {
            System.out.println(e.getMessage());
        }
    }

    private static void a()
    {
        try
        {
            int res = 10 / 0;
        } catch (ArithmeticException e)
        {
            System.out.println("Number cannot be divided by 0");
        }
    }
}

Practical3.java

class Practical3 {
    static void a() {
        int num = 10;

        if (num > 0) {
            System.out.println("Positive number");
        } else {
            System.out.println("Negative number");
        }
    }

    static void b() {
        int num = 10;

        if (num % 3 == 0) {
            System.out.println("Number is divisible by 3");
        } else {
            System.out.println("Number is not divisible by 3");
        }
    }

    static void c() {
        int year = 1976;

        if ((year % 4 == 0 && year % 100 != 0) ||
                (year % 100 == 0 && year % 400 == 0)) {
            System.out.println("It is a leap year!");
        } else {
            System.out.println("It is not a leap year!");
        }
    }

    static void d() {
        int age1 = 19;
        int age2 = 44;
        int age3 = 18;

        int oldest = age1; // assume the oldest is the first person
        int youngest = age1; // assume the youngest is the first person

        // determine the oldest person
        if (age2 > oldest) {
            oldest = age2;
        }
        if (age3 > oldest) {
            oldest = age3;
        }

        // determine the youngest person
        if (age2 < youngest) {
            youngest = age2;
        }
        if (age3 < youngest) {
            youngest = age3;
        }
        System.out.println("The oldest person is " + oldest + " years old.");
        System.out.println("The youngest person is " + youngest + " years old.");
        // if (age1 > age2) {
        // if (age1 > age3) {
        // System.out.println("Age 1 is oldest");
        // } else {
        // System.out.println("Age 3 is oldest");
        // }
        // if (age2 > age3) {
        // System.out.println("Age 3 is youngest");
        // } else {
        // System.out.println("Age 2 is youngest");
        // }
        // } else {
        // if (age2 > age3) {
        // System.out.println("Age 2 is oldest");
        // } else {
        // System.out.println("Age 3 is oldest");
        // }
        // if (age2 > age3) {
        // System.out.println("Age 3 is youngest");
        // } else {
        // System.out.println("Age 2 is youngest");
        // }
        // }
    }

    public static void main(String args[]) {
        a();
        b();
        c();
        d();
    }
}

Practical3Practice.java

import java.util.*;

class Practical3Practice {
    static void one(Scanner sc) {
        System.out.println("Enter length");
        int length = sc.nextInt();

        System.out.println("Enter breadth");
        int breadth = sc.nextInt();

        if (length == breadth) {
            System.out.println("It is a square");
        } else {
            System.out.println("It is a rectangle");
        }
    }

    static void two(Scanner sc) {
        System.out.println("Enter your salary");
        double salary = sc.nextDouble();

        System.out.println("Enter your years of experience");
        double years = sc.nextDouble();

        if (years > 5) {
            salary += salary * 10 / 100;
        } else if (years > 2) {
            salary += salary * 5 / 100;
        } else {
            salary += salary * 2 / 100;
        }

        System.out.println("Your salary with bonus is " + salary);
    }

    static void three(Scanner sc) {
        System.out.println("Enter number of classes held");
        double held = sc.nextDouble();

        System.out.println("Enter number of classes attended");
        double attended = sc.nextDouble();

        double presentPer = attended / held * 100;

        System.out.println("Your present percentage is " + presentPer + "%");

        if (presentPer < 75) {
            System.out.println("You are not allowed to sit in exams");
        } else {
            System.out.println("You are allowed to sit in exams");
        }
    }

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

        one(sc);
        two(sc);
        three(sc);
    }
}

Practical5.java

import java.util.Scanner;

class Practical5 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        // a(sc);
        // b(sc);
        // c();
        d(sc);
    }

    private static void d(Scanner sc) {
        int num = sc.nextInt();
        int c = 0;

        for (int i = 0; i <= num; i++) {
            if (num % i == 0) {
                c++;
            }
        }
        if (c == 2)
            System.out.println("It is a prime number");
        else
            System.out.println("It is not a prime number");
    }

    private static void c() {
        for (int i = 100; i <= 1000; i++) {
            if (i % 5 == 0) {
                System.out.println(i);
            }
        }
    }

    private static void b(Scanner sc) {
        System.out.print("Enter a number: ");
        String number = Integer.toString(sc.nextInt());
        int i = 0;

        while (i < number.length()) {
            System.out.println(number.charAt(i));
            i++;
        }
    }

    private static void a(Scanner sc) {
        System.out.print("Enter a number: ");
        int number = sc.nextInt();

        System.out.print("Press 1 for ascending, press 2 for descending: ");
        int choice = sc.nextInt();

        if (choice == 1) {
            for (int i = 1; i <= number; i++) {
                System.out.println(i);
            }
        } else if (choice == 2) {
            for (int i = number; i >= 1; i--) {
                System.out.println(i);
            }
        }
    }
}

Practical7.java

import java.util.Arrays;
import java.util.Scanner;

class Practical7 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        // a(sc);
        // b(sc);
        // c(sc);
        d(sc);
    }

    private static void d(Scanner sc) {
        System.out.print("Enter some string: ");
        char[] str = sc.nextLine().toCharArray();

        Arrays.sort(str);

        System.out.println("Sorted string is " + new String(str));
    }

    private static void c(Scanner sc) {
        System.out.print("Enter some string: ");
        String str = sc.nextLine().toLowerCase();
        String reverse = "";

        for (int i = str.length() - 1; i >= 0; i--) {
            reverse += str.charAt(i);
        }

        if (reverse.equals(str))
            System.out.println("Provided string is a palindrome");
        else
            System.out.println("Provided string is not a palindrome");
    }

    private static void b(Scanner sc) {
        System.out.print("Enter some string: ");
        String str = sc.nextLine().toLowerCase();
        int count = 0;
        for (int i = 0; i < str.length(); i++) {
            char letter = str.charAt(i);
            if (letter == 'a' || letter == 'e' || letter == 'i' || letter == 'o' || letter == 'u')
                count++;
        }
        System.out.println("The string contains " + count + " vowels");
    }

    private static void a(Scanner sc) {
        System.out.print("Enter some string: ");
        String str = sc.nextLine();

        System.out.println("Length of string is " + str.length());
    }
}

Practical8.java

class Person {
    int personId, age;
    String name;

    Person(int pid, int a, String n) {
        personId = pid;
        age = a;
        name = n;
    }

    void ageGroup() {
        if (age < 8)
            System.out.println("Child");

        else if (age > 8 && age < 20)
            System.out.println("Teenage");

        else if (age >= 20 && age <= 40)
            System.out.println("Young");

        else
            System.out.println("Old");
    }
}

class Student {
    int studentId;
    String subjectCode;
    double marks;

    void getData(int sid, String subCode, double m) {
        studentId = sid;
        subjectCode = subCode;
        marks = m;
    }

    void putData() {
        System.out.println("Student id: " + studentId);
        System.out.println("Subject code: " + subjectCode);
        System.out.println("Marks: " + marks);
    }
}

public class Practical8 {
    public static void main(String[] args) {
        // a();
        b();
    }

    private static void b() {
        Person p1 = new Person(1, 90, "Usman");
        p1.ageGroup();
    }

    private static void a() {
        Student s1 = new Student();
        s1.getData(1, "123", 77.5);

        Student s2 = new Student();
        s2.getData(024, "456", 88.9);

        s1.putData();
        s2.putData();
    }
}

Practical9.java

class Box {
    double width, height, depth;

    Box() {
        width = 10;
        height = 10;
        depth = 10;
    }

    Box(int w, int h, int d) {
        width = w;
        height = h;
        depth = d;
    }

    double volume() {
        return width * height * depth;
    }
}

public class Practical9 {
    public static void main(String[] args) {
        Box b1 = new Box();
        Box b2 = new Box(17, 20, 21);

        System.out.println("Box 1 volume is " + b1.volume());
        System.out.println("Box 2 volume is " + b2.volume());
    }
}

UsmanCIE1.java

import java.util.Scanner;

class UsmanCIE1 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        one(sc);
        two(sc);
        three(sc);
    }

    static void one(Scanner sc) {
        System.out.println("Program 1");
        System.out.print("Enter a number: ");
        int n = sc.nextInt();

        if (n < 0)
            System.out.println(n + " is negative");
        else
            System.out.println(n + " is zero or positive");
    }

    static void two(Scanner sc) {
        System.out.println("\nProgram 2");
        System.out.print("Enter your choice (1 for max. of two numbers. 2 for sum of two numbers): ");
        int choice = sc.nextInt();

        System.out.print("Enter first number: ");
        int n1 = sc.nextInt();
        System.out.print("Enter second number: ");
        int n2 = sc.nextInt();

        switch (choice) {
            case 1:
                System.out.println("Maximum of both numbers is " + Math.max(n1, n2));
                break;
            case 2:
                System.out.println("Sum of both numbers is " + (n1 + n2));
                break;
            default:
                System.out.println("Invalid choice");
                break;
        }
    }

    static void three(Scanner sc) {
        System.out.println("\nProgram 3");
        int count = 0;
        System.out.print("Enter a number: ");
        int n = sc.nextInt();

        for (int i = 1; i <= n; i++) {
            if (n % i == 0)
                count++;
        }

        if (n == 1 || count == 2)
            System.out.println(n + " is a prime number");
        else
            System.out.println(n + " is not a prime number");
    }
}