ValueAssignment2.java

package Basics;

// https://www.youtube.com/watch?v=vlorUYfBb-8&list=PLmOn9nNkQxJH0qBIrtV6otI0Ep4o2q67A&index=229

public class ValueAssignment2 {
  public static void main(String[] args) {
    // run
    User_ u = new User_();
    System.out.println(u.age);

    User_ u1 = new User_(10);
    System.out.println(u1.age);

    u1.setAge(7);
    System.out.println(u1.age);
  }
}

class User_ {
  // attr
  String name;
  int age = 1;

  // constructor
  public User_() {}

  public User_(int a) {
    age = a;
  }

  // getter, setter
  public void setAge(int a) {
    age = a;
  }
}