Main.java

class Main {
  public static void main(String[] args) {
    System.out.println("Hello world!");

    Main d= new Main();

    System.out.println(d.getMonth());
    d.setMonth(6);
    System.out.println(d.getMonth());
  }

  private int month = 1;

  public int getMonth(){
    return month;
  }

  public void setMonth(int value){
    if(value > 0 && value < 13)
      month = value;
  }
}