我完全不喜欢编程(昨天开始……)和Java,所以请原谅任何愚蠢的错误和非常糟糕的代码(我不知道如何订购/格式化).我已经完成了制作视频库存的任务,我希望能够搜索库存以检查特定视频是否在那里.

我知道我可以使用contains来执行此操作,但我不能使用它来处理我的自定义对象ArrayList(视频),我希望它能够搜索所有数据(下面的每个InventoryRow).我已经覆盖了equals和HashCode,但它仍然无法工作 – 每当我尝试运行代码时,它总会告诉我即使视频在那里也无法找到视频. (仅供参考我在租用和检查功能下使用包含在我的代码末尾)

我真的很感激任何帮助,因为我一整天都在谷歌搜索无济于事.如果这不能做或其他方法会更好,请告诉我！谢谢.

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.*;

class InventoryRow {
@Override
public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result
            + ((availability == null) ? 0 : availability.hashCode());
    result = prime * result + ((name == null) ? 0 : name.hashCode());
    result = prime * result
            + ((returndate == null) ? 0 : returndate.hashCode());
    result = prime * result + ((type == null) ? 0 : type.hashCode());
    return result;
}

@Override
public boolean equals(Object obj) {
    if (this == obj)
        return true;
    if (obj == null)
        return false;
    if (getClass() != obj.getClass())
        return false;
    InventoryRow other = (InventoryRow) obj;
    if (availability == null) {
        if (other.availability != null)
            return false;
    } else if (!availability.equals(other.availability))
        return false;
    if (name == null) {
        if (other.name != null)
            return false;
    } else if (!name.equals(other.name))
        return false;
    if (returndate == null) {
        if (other.returndate != null)
            return false;
    } else if (!returndate.equals(other.returndate))
        return false;
    if (type == null) {
        if (other.type != null)
            return false;
    } else if (!type.equals(other.type))
        return false;
    return true;
}

private String name;
private String type;
private Character availability;
private String returndate;

public InventoryRow(String name,String type,Character availability,String returndate) {
    this.name = name;
    this.type = type;
    this.availability = availability;
    this.returndate = returndate;
}

public String getReturndate() {
    return returndate;
}

public void setReturndate(String returndate) {
    this.returndate = returndate;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getType() {
    return type;
}

public void setType(String type) {
    this.type = type;
}

public Character getAvailability() {
    return availability;
}

public void setAvailability(Character availability) {
    this.availability = availability;
}

public String toString() {
    return name + "   " + type + "   " + availability + "   " + returndate;
}
}

public class InventorySort {

public static void main(String[] args) {
    List