Java 我在使用Collections.sort方法对arraylist进行排序时遇到问题-我一直收到一条错误消息

我在我的外壳上查找它，然后我的消息声明

Note: EarthquakeTester.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

javac-Xlint EarthquakeTester.java
EarthquakeTester.java:80:警告：[未选中]未选中的方法调用：类集合中的方法排序应用于给定类型
集合。排序（earthquakeArrayList）；
^
必填项：列表
发现：ArrayList
其中T是一个类型变量：
T您需要将earthquakeArrayList定义为参数化ArrayList：

public abstract class Earthquake implements Comparable 
.....
...
...

      public int compareTo(Object obj)
 {
     Earthquake other = (Earthquake) obj;
     
     if(this.magnitude < other.getMagnitude() )
     {return 1;}
     else if(this.magnitude > other.getMagnitude())
             {return -1 ;}
     else 
         return 0;
 }
    

ArrayList earthquakeArrayList=new ArrayList（）；
您的代码在哪里？如何定义地震阵列列表？
         ArrayList<Earthquake> earthquakeArrayList = new ArrayList<>(); 

if(mag < 3)
          earthquakeArrayList.add(new NonClassified(TimeAndDate, lat, lon, mag, id, place));

else
 earthquakeArrayList.add(new Classified(TimeAndDate, lat, lon, mag, id, place));
     
 Collections.sort(earthquakeArrayList);

public abstract class Earthquake implements Comparable 
.....
...
...

      public int compareTo(Object obj)
 {
     Earthquake other = (Earthquake) obj;
     
     if(this.magnitude < other.getMagnitude() )
     {return 1;}
     else if(this.magnitude > other.getMagnitude())
             {return -1 ;}
     else 
         return 0;
 }
    

ArrayList<Earthquake> earthquakeArrayList = new ArrayList<>();