program to demonstrate static variable

class Employee {
  // Static variable
  static int count = 0;
  // Constructor
  Employee() {
    count++;
  }
  // Method to display the value of count
  void totalEmployee() {
    print("Total Employee: $count");
  }
}

void main() {
  // Creating objects of Employee class
  Employee e1 = new Employee();
  e1.totalEmployee();
  Employee e2 = new Employee();
  e2.totalEmployee();
  Employee e3 = new Employee();
  e3.totalEmployee();
}

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Another example of static variable

class Student {
  int id;
  String name;
  static String schoolName = "ABC School";
  Student(this.id, this.name);
  void display() {
    print("Id: ${this.id}");
    print("Name: ${this.name}");
    print("School Name: ${Student.schoolName}");
  }
}

void main() {
  Student s1 = new Student(1, "John");
  s1.display();
  Student s2 = new Student(2, "Smith");
  s2.display();
}

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program to demonstrate static method, static method can be called without creating object

class SimpleInterest {
  static double calculateInterest(double principal, double rate, double time) {
    return (principal * rate * time) / 100;
  }
}

void main() {
  print(
      "The simple interest is ${SimpleInterest.calculateInterest(1000, 2, 2)}");
}

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program to create a static method which will generate a random password

import 'dart:math';

class PasswordGenerator {
  static String generateRandomPassword() {
    List<String> allalphabets = 'abcdefghijklmnopqrstuvwxyz'.split('');
    List<int> numbers = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
    List<String> specialCharacters = ["@", "#", "%", "&", "*"];
    List<String> password = [];
    for (int i = 0; i < 5; i++) {
      password.add(allalphabets[Random().nextInt(allalphabets.length)]);
      password.add(numbers[Random().nextInt(numbers.length)].toString());
      password
          .add(specialCharacters[Random().nextInt(specialCharacters.length)]);
    }
    return password.join();
  }
}

void main() {
  print(PasswordGenerator.generateRandomPassword());
}

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