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How do I print my Java object without getting “SomeType@2f92e0f4”?10个
我正在使用一个示例,它使用ArrayList包含新实例,并使用Collections.sort()方法使用类似的接口.我不知道为什么它在排序时打印出哈希码以及我的代码中的错误.任何人都可以找出错误并详细解释我.
我正在使用一个示例,它使用ArrayList包含新实例,并使用Collections.sort()方法使用类似的接口.我不知道为什么它在排序时打印出哈希码以及我的代码中的错误.任何人都可以找出错误并详细解释我.
SortFruitObject.java
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);
}
}
Fruit.java
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;
}
}
输出：
[Fruit@36422510,Fruit@308f5944,Fruit@132d9844,Fruit@1667a232]
