class Main {

​

  int a;

  boolean b;

  byte c;

  short d;

  long e;

  char f;

  float g;

​

  public static void main(String[] args) {

​

    // A default constructor is called

    Main obj = new Main();

​

    System.out.println("Default Value:");

    System.out.println("int = " + obj.a);

    System.out.println("boolean = " + obj.b);

    System.out.println("byte = " + obj.c);

    System.out.println("short = " + obj.d);

    System.out.println("long = " + obj.e);

    System.out.println("char = " + obj.f);

    System.out.println("float = " + obj.g);

  }

}

public class Student {

  String firstName;

  String lastName;

  int age;

​

  //Student constructor

  public Student(){

      firstName = "Ihechikara";

      lastName = "Abba";

      age = 100;

  }

  public static void main(String args[]) {

      Student myStudent = new Student();

      System.out.println(myStudent.age);

      // 100

  }

}