使用用户输入和迭代器从ArrayList中删除元素

import java.util.ArrayList;
import java.util.Scanner;

public class ArrayListRemoveExample {
    public static void main(String[] args) {
        ArrayList<String> list = new ArrayList<>();
        list.add("Apple");
        list.add("Banana");
        list.add("Orange");
        
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入要删除的元素的值或索引：");
        String input = scanner.nextLine();
        
        if (input.matches("\\d+")) { // 判断输入是否为数字，即索引
            int index = Integer.parseInt(input);
            if (index >= 0 && index < list.size()) {
                list.remove(index);
                System.out.println("删除成功！");
            } else {
                System.out.println("索引无效！");
            }
        } else {
            if (list.remove(input)) {
                System.out.println("删除成功！");
            } else {
                System.out.println("元素不存在！");
            }
        }
        
        System.out.println("删除后的ArrayList：" + list);
    }
}

import java.util.ArrayList;
import java.util.Iterator;

public class ArrayListRemoveExample {
    public static void main(String[] args) {
        ArrayList<String> list = new ArrayList<>();
        list.add("Apple");
        list.add("Banana");
        list.add("Orange");
        
        Iterator<String> iterator = list.iterator();
        while (iterator.hasNext()) {
            String element = iterator.next();
            if (element.equals("Banana")) {
                iterator.remove();
                System.out.println("删除成功！");
            }
        }
        
        System.out.println("删除后的ArrayList：" + list);
    }
}