#Java泛型类。，

#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：