关于java：使用Collections.sort（）时，它会对哈希码进行排序和打印

When using Collections.sort(), it sorts and prints the hashcode

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我使用了一个示例，其中它使用arraylist包含新实例，并使用collections.sort()方法使用可比较的接口。我不知道它为什么会在分类时打印出哈希代码，以及我的代码中的错误在哪里。有人能找出错误并详细解释一下吗？

Sort水果对象.java

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import java.util.*;
public class SortFruitObject{
public static void main(String[] args){
ArrayList<Fruit> frui = new ArrayList<Fruit>();

frui.add(new Fruit("Pine","PineDesc", 500));
frui.add(new Fruit("Apple","AppleDesc", 400));
frui.add(new Fruit("Banana","BananaDesc", 450));
frui.add(new Fruit("JackFruit","JackFruitDesc", 300));

Collections.sort(frui);
System.out.println(frui);
}
}

水果.java

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import java.io.*;
import java.util.*;
public class Fruit implements Comparable<Fruit>{
private String fruitName;
private String fruitDesc;
private int fruitQuantity;

public int compareTo(Fruit f){
return fruitName.compareTo(f.getFruitName());
}

public Fruit(String fruitName, String fruitDesc, int fruitQuantity){
this.fruitName = fruitName;
this.fruitDesc = fruitDesc;
this.fruitQuantity = fruitQuantity;
}
public void setFruitName(String fruitName){
this.fruitName = fruitName;
}
public void setFruitDesc(String fruitDesc){
this.fruitDesc = fruitDesc;
}
public void setFruitQuantity(int fruitQuantity){
this.fruitQuantity = fruitQuantity;
}
public String getFruitName(){
return fruitName;
}
public String getFruitDesc(){
return fruitDesc;
}
public int getFruitQuantity(){
return fruitQuantity;
}
}

号

输出：

1	[Fruit@36422510, Fruit@308f5944, Fruit@132d9844, Fruit@1667a232]