为啥我的值都是0

package com.imooc.weather;

public class Weather {
    private int temperature;
    private int humidity;
    boolean flag=false;
 public int getTemperature() {
  return temperature;
 }
 public void setTemperature(int temperature) {
  this.temperature = temperature;
 }
 public int getHumidity() {
  return humidity;
 }
 public void setHumidity(int humidity) {
  this.humidity = humidity;
 }
    public synchronized void generate() {
     if(flag) {
      try {
    wait();
   } catch (InterruptedException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
     }
     setTemperature((int)(Math.random())*100);
     setHumidity((int)(Math.random())*40);
     System.out.println("生成天气数据："+new Weather());
     flag=true;
     notifyAll();
    }
    public synchronized void read() {
     if(!flag) {
      try {
       wait();
      }catch(InterruptedException e) {
       
       e.printStackTrace();
      }
     }
     System.out.println("读取天气数据："+new Weather());
     flag=false;
     notifyAll();
    }
    public String toString() {
     return "[温度："+this.getTemperature()+",湿度："+this.getHumidity()+"]";
    }
}

package com.imooc.weather;

public class GenerateWeather implements Runnable{
    Weather weather;
    public GenerateWeather(Weather weather){
     this.weather=weather;
    }
 
 @Override
 public void run() {
  // TODO Auto-generated method stub
  for(int i=0;i<100;i++) {
     weather.generate();
     try {
       Thread.sleep(5000);
      }catch(InterruptedException e) {
       e.printStackTrace();
      }
  }
 }
   
}

package com.imooc.weather;

public class ReadWeather implements Runnable{
    Weather weather;
    public ReadWeather(Weather weather){
     this.weather=weather;
    }
 @Override
 public void run() {
  // TODO Auto-generated method stub
  for(int i=0;i<100;i++) {
      weather.read();
      try {
       Thread.sleep(100);
      }catch(InterruptedException e) {
       e.printStackTrace();
      }
  }
 }

}

package com.imooc.weather;

public class Test {

 public static void main(String[] args) {
  Weather one=new Weather();
  new Thread(new GenerateWeather(one)).start();
  new Thread(new ReadWeather(one)).start();
 }

}