#Java泛型类。

编写一个学校School泛型类和一个班级Class泛型类，编写一个学生Student普通类。三个类之间的关系是：学校里有多个班级，班级里有多个学生。使用泛型类嵌套泛型类的方式实现以上场景。

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代码如下：

package com.homework.lhh;public class Ex05 {    public static void main(String[] args) {        /*         * Students stu = new Students("小怪兽", 18); Class<Students> cla = new         * Class<Students>(stu); School<Class<Students>> sho = new         * School<Class<Students>>(cla);         * System.out.println(sho.getData().getData().toString());         */        //设置班级数，以及班级中学生信息        Students[] class01 = { new Students("小怪兽", 18, 1001), new Students("奥特玛", 17, 1002),                new Students("伊丽莎白", 18, 1003), new Students("山鸡", 19, 1004), new Students("威廉姆斯", 18, 1005) };        Students[] class02 = { new Students("小小", 18, 1006), new Students("嗷嗷", 17, 1007), new Students("依依", 18, 1008),                new Students("吉吉", 19, 1009), new Students("微微", 18, 1010) };        Students[] class03 = { new Students("兽兽", 18, 1011), new Students("特特", 17, 1012), new Students("丽丽", 18, 1013),                new Students("姗姗", 19, 1014), new Students("思思", 18, 1015) ,new Students("奥利奥", 17, 1016)};        //用一个班级信息的数组存放所有的班级        @SuppressWarnings({ "unchecked", "rawtypes" })        Class<Students>[] classinfo = new Class[] { new Class(class01), new Class(class02), new Class(class03) };        //用一个学校的数组显示所有的班级        @SuppressWarnings({ "unchecked", "rawtypes" })        School<Class<Students>> school = new School(classinfo);        int num = 0;        for (int i = 0; i < school.getArray().length; i++) {            System.out.println("第" + (i + 1) + "班学生信息为：");            num = 0;            for (int j = 0; j < school.getArray()[i].getArray().length; j++) {                System.out.println(school.getArray()[i].getArray()[j]);                num++;            }            System.out.println((i + 1) + "班一共有" + num + "名学生");            System.out.println();        }    }}class School<T> {    T[] array;    public T[] getArray() {        return array;    }    public void setArray(T[] array) {        this.array = array;    }    public School(T[] array) {        super();        this.array = array;    }}class Class<T> {    T[] array;    public Class(T[] array) {        super();        this.array = array;    }    public T[] getArray() {        return array;    }    public void setArray(T[] array) {        this.array = array;    }}class Students {    private String name;    private int age;    private int id;    public int getId() {        return id;    }    public void setId(int id) {        this.id = id;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public int getAge() {        return age;    }    public void setAge(int age) {        this.age = age;    }    public Students(String name, int age, int id) {        super();        this.name = name;        this.age = age;        this.id = id;    }    @Override    public String toString() {        return "姓名：" + name + "\t年龄：" + age + "岁\t学号：" + id;    }}

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运行结果如下：