Java线程等待用法实例分析

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 +        '}';  }}