用于在Java中存储对象的ArrayList是'；我添加对象时不工作

我正在解决一个来自演习的演习：货舱。我应该将一个类的对象存储到另一个类的

ArrayList

，但每当我使用

this.suitcases.add（行李箱）

方法时，它在打印对象时从不添加对象。我怎样才能解决这个问题？任何帮助都将不胜感激。谢谢

程序的输出应如下所示：

2个手提箱（7公斤）

我的输出：

0个手提箱（0公斤）

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我并没有仅仅根据你的代码来阅读练习题，你的问题在于你在等待中的状态，特别是在AddCasts中

public void addSuitcase(Suitcase suitcase){
if(suitcase.totalWeight() + minWeight >= maxWeight){
    minWeight = minWeight + suitcase.totalWeight();
    this.suitcases.add(suitcase);
}

}

应该是

public void addSuitcase(Suitcase suitcase){
if(suitcase.totalWeight() + minWeight <= maxWeight){
    minWeight = minWeight + suitcase.totalWeight();
    this.suitcases.add(suitcase);
}

公共行李箱（行李箱）{
如果（手提箱。总重量（）+最小重量）我很确定
手提箱。总重量（）+最小重量>=maxWeight
应该是
手提箱。总重量（）+最小重量，所以它只是一个打字错误：/我已经盯着它看了这么久了。。谢谢你总是很好，理解问题，然后回答。
public class Item {

    private String name;
    private int weight;
    
    public Item(String name, int weight){
        this.name = name;
        this.weight = weight;
    }
    
    public String getName(){
        return this.name;
    }
    
    public int getWeight(){
        return this.weight;
    }
    
    public String toString(){
        return this.name + " (" + this.weight + " kg)";
    }
}

public class Main {

    public static void main(String[] args) {
        // You can use the main to test your classes!
        Item book = new Item("Lord of the rings", 2);
        Item phone = new Item("Nokia 3210", 1);
        Item brick = new Item("brick", 4);

        Suitcase adasCase = new Suitcase(10);
        adasCase.addItem(book);
        adasCase.addItem(phone);

        Suitcase pekkasCase = new Suitcase(10);
        pekkasCase.addItem(brick);

        Hold hold = new Hold(1000);
        hold.addSuitcase(adasCase);
        hold.addSuitcase(pekkasCase);

        System.out.println(hold);
    }

}

public void addSuitcase(Suitcase suitcase){
if(suitcase.totalWeight() + minWeight >= maxWeight){
    minWeight = minWeight + suitcase.totalWeight();
    this.suitcases.add(suitcase);
}

public void addSuitcase(Suitcase suitcase){
if(suitcase.totalWeight() + minWeight <= maxWeight){
    minWeight = minWeight + suitcase.totalWeight();
    this.suitcases.add(suitcase);
}