Java中ArrayList边遍历边修改

public static void main(String[] args) {
        ArrayList<String> list = new ArrayList<>();
        list.add("aa");
        list.add("bb");
        list.add("cc");
        list.add("dd");
        System.out.println(list);

        for (String s : list) {
            if (s.equals("dd")) {
                list.remove(s);
            }
        }
        System.out.println(list);
    }

public static void main(String[] args) {
        ArrayList<String> list = new ArrayList<>();
        list.add("aa");
        list.add("bb");
        list.add("cc");
        list.add("dd");
        System.out.println(list);

        Iterator<String> iterator = list.iterator();
        while (iterator.hasNext()) {
            String next = iterator.next();
            if (next.equals("dd")) {
                iterator.remove();
            }
        }
        System.out.println(list);
}

public static void main(String[] args) {
        ArrayList<String> list = new ArrayList<>();
        list.add("aa");
        list.add("bb");
        list.add("cc");
        list.add("dd");
        System.out.println(list);
        
        for (int i = 0; i < list.size(); i++) {
            String s = list.get(i);
            if (s.equals("dd")) {
                list.remove(s);
            }
        }
        System.out.println(list);
}

public static void main(String[] args) {
        ArrayList<String> list = new ArrayList<>();
        list.add("aa");
        list.add("bb");
        list.add("cc");
        list.add("dd");
        System.out.println(list);

        list.removeIf(next -> next.equals("dd"));
        System.out.println(list);
}