The method newRandom() is undefined for the type Weather

错误提示：Exception in thread "main" java.lang.Error: Unresolved compilation problem: 

The method newRandom() is undefined for the type Weather

at com.imooc.weather.Weather.<init>(Weather.java:9)

at com.imooc.weather.WeatherTest.main(WeatherTest.java:6)

应该如何修改哦？

package com.imooc.weather;

public class WeatherTest {

public static void main(String[] args) {

Weather oneday=new Weather();

oneday.generate();

//oneday.read();

}

}

package com.imooc.weather;

import java.util.Random;

public class Weather {

private int temperature;

private int humdity;

boolean flag = false;

Random rand = newRandom();

public synchronized void generate() {

this.setTemperature(rand.nextInt(41));

this.setHumdity(rand.nextInt(101));

System.out.println("生成"+this);

}

public synchronized void read() {

System.out.println("读取"+this);

}

@Override

public String toString() {

return "天气数据 [温度："+this.getTemperature()+",湿度"+this.humdity+"]";

}

public int getTemperature() {

return temperature;

}

public void setTemperature(int temperature) {

this.temperature = temperature;

}

public int getHumdity() {

return humdity;

}

public void setHumdity(int humdity) {

this.humdity = humdity;

}

}

​