Java 自定义学生类:包含姓名,年龄,成绩属性.私有成员变量,生成无参,有参构造方法,生成get/set方法. 创建5个学生放到ArrayList中.使用迭代器获取每个学生信息.统计总分,平均分,最高分,最低分并输出

好的，我可以回答这个问题。以下是Java代码：

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

public class Student {
    private String name;
    private int age;
    private double grade;

    public Student() {}
    public Student(String name, int age, double grade) {
        this.name = name;
        this.age = age;
        this.grade = grade;
    }

    public String getName() {
        return name;
    }
    public int getAge() {
        return age;
    }
    public double getGrade() {
        return grade;
    }

    public void setName(String name) {
        this.name = name;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public void setGrade(double grade) {
        this.grade = grade;
    }

    public static void main(String[] args) {
        ArrayList<Student> students = new ArrayList<>();
        students.add(new Student("Tom", 20, 80));
        students.add(new Student("Jerry", 21, 90));
        students.add(new Student("Alice", 19, 70));
        students.add(new Student("Bob", 22, 85));
        students.add(new Student("Lily", 18, 95));

        Iterator<Student> iterator = students.iterator();
        double sum = 0;
        double maxGrade = Double.MIN_VALUE;
        double minGrade = Double.MAX_VALUE;
        while (iterator.hasNext()) {
            Student student = iterator.next();
            System.out.println("Name: " + student.getName() +
                    ", Age: " + student.getAge() +
                    ", Grade: " + student.getGrade());
            sum += student.getGrade();
            maxGrade = Math.max(maxGrade, student.getGrade());
            minGrade = Math.min(minGrade, student.getGrade());
        }

        double average = sum / students.size();
        System.out.println("Total grade: " + sum);
        System.out.println("Average grade: " + average);
        System.out.println("Max grade: " + maxGrade);
        System.out.println("Min grade: " + minGrade);
    }
}

运行后，输出结果为：

Name: Tom, Age: 20, Grade: 80.0
Name: Jerry, Age: 21, Grade: 90.0
Name: Alice, Age: 19, Grade: 70.0
Name: Bob, Age: 22, Grade: 85.0
Name: Lily, Age: 18, Grade: 95.0
Total grade: 420.0
Average grade: 84.0
Max grade: 95.0
Min grade: 70.0