thisDemo2.java

package Basics;

// https://www.youtube.com/watch?v=Pmqp7R-J3ys&list=PLmOn9nNkQxJH0qBIrtV6otI0Ep4o2q67A&index=232

public class thisDemo2 {
  public static void main(String[] args) {
    // run
    Person_4 p1 = new Person_4();
    p1.setAge(100);
    System.out.println(p1.getAge());

    p1.setName("tommy");
    System.out.println(p1.getName());

    p1.eat();
  }
}

class Person_4 {
  // attr
  private String name;
  private int age;

  // constructor
  public Person_4() {}

  public Person_4(String name) {
    this.name = name;
  }

  public String getName() {
    return name;
  }

  // getter, setter
  public void setName(String name) {
    // name = name;  //<-- this one NOT working, since it try to dispense the value  to itself
    // (name)
    this.name = name; // this means the "current" class, so this.name means current class's name
  }

  public int getAge() {
    return age;
  }

  public void setAge(int age) {
    // age = age;  //<-- this one NOT working, since it try to dispense the value  to itself (age)
    this.age = age; // this means the "current" class
  }

  // method
  public void eat() {
    System.out.println("ppl eat");
    this.sleep();
  }

  public void sleep() {
    System.out.println("ppl sleep");
  }
}