编辑1：将覆盖方法中的==更改为.equals（）。它没有改变任何东西。 :-(
编辑2：是的，我知道它是否有荆棘或气味是布尔值，但现在不需要它。我可以稍后再做。
我会尝试发布尽可能少的代码以保持简洁。我有一个Driver类，一个Parent类和三个子类。我正在接受用户输入来构建字符串的ArrayList，然后我必须能够显示，删除，过滤和搜索数组。我可以添加元素并显示它们，但是，我已经使用我的remove方法陷入了僵局。即使我尝试使用Override equals方法，用户输入的字符串也不等于ArrayList中的字符串。我将展示Driver类，Parent类和一个子类，因为其他两个子类现在不相关。
注意：我正在为用户提供一个选项，用于选择用户想要添加/删除的工厂，从而选择多种方法。我只是想创造一些额外的东西，我打破了我的代码。
问题是它仍会打印出在库存中找不到的内容，再次显示后，该元素尚未删除。我还没有完成其他方法，因为我坚持删除元素。 任何帮助/建议将不胜感激。我试过找到类似的问题，如果这是一个重复的问题，但我有一个独特的问题，因为我有多个类。我在另一个只有Driver和Flower类的程序中使用了类似的代码。它工作正常。
我还没有正式学习Override方法，所以我自己尝试了无效。
家长班：
public class Plant {
public String ID;
public String name;
public Plant(String ID, String name) {
this.ID = ID;
this.name = name;
}
public void setID(String ID) {this.ID = ID;}
public void setName(String name) {this.name = name;}
public String getID() {return ID;}
public String getName() {return name;}
public String toString() {
return "ID: " + this.ID + ", Name: " + this.name;
}
@Override
public boolean equals(Object obj) {
if(!(obj instanceof Plant)) {
return false;
}
Plant plant = (Plant) obj;
return this.ID.equals(plant.ID) && this.name.equals(plant.name);
}
}
三个子课程中的一个：
public class Flower extends Plant {
public String color;
public String smell;
public String hasThorns;
public Flower(String ID, String name, String color, String smell, String hasThorns) {
super(ID, name);
this.color = color;
this.smell = smell;
this.hasThorns = hasThorns;
}
public void setColor(String color) {
this.color = color;
}
public void setSmell(String smell) {
this.smell = smell;
}
public void setThorns(String hasThorns) {
this.hasThorns = hasThorns;
}
public String getColor() {
return color;
}
public String getSmell() {
return smell;
}
public String getHasThorns() {
return hasThorns;
}
public String toString() {
return super.toString() + ", Color: " + this.color + ", Scent? " + this.smell + ", Thorns? " + this.hasThorns;
}
@Override
public boolean equals(Object obj) {
if(!(obj instanceof Flower)) {
return false;
}
Flower flower = (Flower) obj;
return this.ID.equals(flower.ID) && this.name.equals(flower.name) && this.color.equals(flower.color) && this.smell.equals(flower.smell) && this.hasThorns.equals(flower.hasThorns);
}
}
Driver类：
import java.util.ArrayList;
import java.util.Scanner;
public class Driver {
public String ID = new String();
public String name = new String();
public String color = new String();
public String smell = new String();
public String hasThorns = new String();
public String isPoisonous = new String();
public String isMedicine = new String();
public String isEdible = new String();
public static void main(String[] args) {new Driver();}
public Driver() {
Scanner input = new Scanner(System.in);
ArrayList<Plant> plantPack = new ArrayList<Plant>();
System.out.println("Welcome to the Plant Pack interface.");
System.out.println("Please select a number from the options below.");
System.out.println("");
while (true) {
System.out.println("1: Add a plant to the pack.");
System.out.println("2: Remove a plant from the pack.");
System.out.println("3: Search for a specific plant.");
System.out.println("4: Display your plant pack.");
System.out.println("5: Filter the plant pack by incomplete name.");
System.out.println("0: Exit the plant pack interface.");
// Get the user input
int userChoice = input.nextInt();
switch (userChoice) {
case 1:
typeSwitch(plantPack);
break;
case 2:
removePlant(plantPack);
break;
case 3:
searchPlants(plantPack);
break;
case 4:
displayPlants(plantPack);
break;
case 5:
filterPlants(plantPack);
break;
case 0:
exitInterface();
break;
default:
System.out.println("Invalid entry. \nPlease choose between 1-5, or 0: ");
break;
}
}
}
public void typeSwitch(ArrayList<Plant> plantPack) {
Scanner input = new Scanner(System.in);
System.out.println("Please enter what type of plant you are adding: ");
System.out.println("1: Flower");
System.out.println("2: Fungus");
System.out.println("3: Weed");
int type = input.nextInt();
if (type >= 1 && type <= 3) {
switch (type) {
case 1:
addFlower(plantPack);
break;
case 2:
addFungus(plantPack);
break;
case 3:
addWeed(plantPack);
break;
}
}
else
{
System.out.println("Invalid Entry. Please choose between 1-3: ");
typeSwitch(plantPack);
}
}
private void addFlower(ArrayList<Plant> plantPack) {
Flower newFlower = new Flower(ID, name, color, smell, hasThorns);
Scanner input = new Scanner(System.in);
if(plantPack.size() < 25)
{
System.out.println("Enter the ID number of the flower you wish to add (E.g. F1, F2, etc): ");
newFlower.setID(input.nextLine());
System.out.println("Enter the name of the flower you wish to add: ");
newFlower.setName(input.nextLine());
System.out.println("Enter the color of the flower you wish to add: ");
newFlower.setColor(input.nextLine());
System.out.println("Does the flower have a scent? Yes or No: ");
newFlower.setSmell(input.nextLine());
System.out.println("Does the flower have thorns? Yes or No: ");
newFlower.setThorns(input.nextLine());
plantPack.add(newFlower);
}
else
{
System.out.println("You may only hold 25 items in your plant pack. Please remove one before adding another.");
}
}
private void addFungus(ArrayList<Plant> plantPack) {
Fungus newFungus = new Fungus(ID, name, color, isPoisonous);
Scanner input = new Scanner(System.in);
if(plantPack.size() < 25)
{
System.out.println("Enter the ID number of the fungus you wish to add: ");
newFungus.setID(input.nextLine());
System.out.println("Enter the name of the fungus you wish to add: ");
newFungus.setName(input.nextLine());
System.out.println("Enter the color of the fungus you wish to add: ");
newFungus.setColor(input.nextLine());
System.out.println("Is this particular fungus poisonous? Yes or No: ");
newFungus.setIsPoisonous(input.nextLine());
plantPack.add(newFungus);
}
else
{
System.out.println("You may only hold 25 items in your plant pack. Please remove one before adding another.");
}
}
private void addWeed(ArrayList<Plant> plantPack) {
Weed newWeed = new Weed(ID, name, color, isEdible, isPoisonous);
Scanner input = new Scanner(System.in);
if(plantPack.size() < 25)
{
System.out.println("Enter the ID number of the weed you wish to add: ");
newWeed.setID(input.nextLine());
System.out.println("Enter the name of the weed you wish to add: ");
newWeed.setName(input.nextLine());
System.out.println("Enter the color of the weed you wish to add: ");
newWeed.setColor(input.nextLine());
System.out.println("Is this particular weed edible? Yes or No: ");
newWeed.setIsEdible(input.nextLine());
System.out.println("Is this particular weed medicinal? Yes or No: ");
newWeed.setIsMedicine(input.nextLine());
plantPack.add(newWeed);
}
else
{
System.out.println("You may only hold 25 items in your plant pack. Please remove one before adding another.");
}
}
private void removePlant(ArrayList<Plant> plantPack) {
Scanner input = new Scanner(System.in);
System.out.println("Which type of plant do you wish to remove?");
System.out.println("1: Flower");
System.out.println("2: Fungus");
System.out.println("3: Weed");
int type = input.nextInt();
switch (type) {
case 1:
System.out.println("Enter the ID number of the flower you want to remove: ");
String deleteFlowerID = input.nextLine();
input.nextLine();
System.out.println("Enter the name of the flower you wish to remove: ");
String deleteName = input.nextLine();
System.out.println("Enter the color of the flower you wish to remove: ");
String deleteColor = input.nextLine();
System.out.println("Is this a flower with a scent? Yes or No: ");
String deleteSmell = input.nextLine();
System.out.println("Is this a flower with thorns? Yes or No: ");
String deleteThorns = input.nextLine();
boolean found = false;
for (int i = 0; i < plantPack.size(); i++) {
Flower flower=(Flower)plantPack.get(i);
if (flower.getID().equals(deleteFlowerID) && flower.getName().equals(deleteName) && flower.getColor().equals(deleteColor) && flower.getSmell().equals(deleteSmell) && flower.getHasThorns().equals(deleteThorns)) {
plantPack.remove(i);
found = true;
break;
}
}
if (found)
{
System.out.println("That flower was successfully removed from your inventory.");
} else
{
System.out.println("That flower was not found in your inventory.");
}
break;
case 2:
break;
case 3:
break;
}
}
private void searchPlants(ArrayList<Plant> plantPack) {
}
private void displayPlants(ArrayList<Plant> plantPack) {
for(Plant plants : plantPack) {
System.out.println(plants);
}
}
private void filterPlants(ArrayList<Plant> plantPack) {
}
private void exitInterface() {
}
}