global state antipattern

globalState.java

class Book {

  private String title;
  private String author;
  private int price;

  public String getTitle() {
    return title;
  }
 
  public void setTitle(String title) {
    this.title = title;
  }

  public String getAuthor() {
    return author;
  }

  public void setAuthor(String author) {
    this.author = author;
  }

  public int getPrice() {
    return price
  }

  public void setPrice(int price) {
    this.price = price;
  }

}