Java迭代器修改元素

代码很简单  就是添加一个索引   我愣是半天没想出来；

先创建元素

@Test
public void test() {
    Student student1 = new Student("zhangsan", 1, 80);
    Student student2 = new Student("lisi", null, 90);
    Student student3 = new Student("wangwu", 2, 100);
    List<Student> list = new ArrayList<>();
    list.add(student1);
    list.add(student2);
    list.add(student3);

    Iterator<Student> iterator = list.iterator();
    int i = 0;
    while (iterator.hasNext()) {
        Student infoDb = iterator.next();
        Student student4 = new Student("wang", 3, 1000000);
        if (infoDb.a.equals("wangwu")){
                list.set(i, student4);
            }else if (infoDb.a.equals("zhangsan")){
            iterator.remove();
        }
        i++;
        System.out.println(infoDb.toString());
    }
    System.out.println(list);
}

//随便建个实体
public class Student {
    public Student(String a, Integer b, Integer c) {
        this.a = a;
        this.b = b;
        this.c = c;
    }

    public Student() {
    }

    String a;
    Integer b;
    Integer c;
}

这样既可以删除又可以修改