public class Hello {
  public static void main(String[] args) {
    A a = new A();
    new Thread(new MyRun(a)).start();
    new Thread(new MyRun1(a)).start();
  }
}
class MyRun implements Runnable {
  private A a;
  public MyRun(A a) {
    this.a = a;
  }
  @Override
  public void run() {
    synchronized (a) {
      a.setTitle("hello");
      try {
        a.wait();
      } catch (InterruptedException e) {
        e.printStackTrace();
      }
      a.setNumber(12);
      System.out.println(a);
    }
  }
}
class MyRun1 implements Runnable {
  private A a;
  public MyRun1(A a) {
    this.a = a;
  }
  @Override
  public void run() {
    synchronized (a) {
      a.setTitle("world");
      a.setNumber(24);
      a.notifyAll();
      System.out.println(a);
    }
  }
}
class A {
  private String title;
  private Integer number;
  public String getTitle() {
    return title;
  }
  public void setTitle(String title) {
    this.title = title;
  }
  public Integer getNumber() {
    return number;
  }
  public void setNumber(Integer number) {
    this.number = number;
  }
  @Override
  public String toString() {
    return "A{" +
        "title='" + title + '\'' +
        ", number=" + number +
        '}';
  }
}