package Collec2;

import java.util.HashMap;

import java.util.Iterator;

import java.util.Map;

import java.util.Map.Entry;

import java.util.Set;

public class Test1 {

    public static void main(String[] args) {

        HashMap<Student, String> hashmap_88 = new HashMap<Student, String>();

        hashmap_88.put(new Student("张三", 23), "北京");

        hashmap_88.put(new Student("李四", 24), "南京");

        HashMap<Student, String> hashmap_99 = new HashMap<Student, String>();

        hashmap_99.put(new Student("王五", 23), "上海");

        hashmap_99.put(new Student("赵六", 24), "深圳");

        HashMap<HashMap<Student, String>, String> hm = new HashMap<HashMap<Student, String>, String>();

        hm.put(hashmap_88, "第88期基础班");

        hm.put(hashmap_99, "第99期基础班");

        System.out.println("遍历方式一");

        Set<HashMap<Student, String>> ks = hm.keySet();

        Iterator<HashMap<Student, String>> it1 = ks.iterator();

        while(it1.hasNext()) {

            HashMap<Student,String> next_stu_value = it1.next();

            Set<Student> stu_set = next_stu_value.keySet();

            Iterator<Student> stu_it = stu_set.iterator();

            System.out.println(hm.get(next_stu_value)+"有以下学生");

            while(stu_it.hasNext()) {

                Student student = stu_it.next();

                System.out.println("个人信息"+student);

            }

        }

        System.out.println("遍历方式二");

        for (HashMap<Student, String> hashMap : hm.keySet()) {

            System.out.println(hm.get(hashMap)+"有以下学生");

            for (Student stu : hashMap.keySet()) {

                System.out.println("个人信息"+stu);

            }

        }

        System.out.println("遍历方式三");

        Set<HashMap<Student,String>> x=hm.keySet();

        for(Iterator<HashMap<Student,String>> it= x.iterator();it.hasNext();) {

             HashMap<Student, String> stu_map_value = it.next();

             System.out.println(hm.get(stu_map_value)+"有以下学生");

            for( Iterator<Student> it2 = stu_map_value.keySet().iterator();it2.hasNext();) {

                Student student = it2.next();

                System.out.println("个人信息"+student);

            }

        }

        System.out.println("遍历方式四");

        Set<Entry<HashMap<Student,String>,String>> entrySet = hm.entrySet();

        Iterator<Entry<HashMap<Student, String>, String>> itentry = entrySet.iterator();

        while(itentry.hasNext()) {

            Entry<HashMap<Student, String>, String> entry = itentry.next();

            HashMap<Student,String> map = entry.getKey();

            System.out.println(entry.getValue()+"有以下学生");

            Iterator<Entry<Student, String>> iterator = map.entrySet().iterator();

             while(iterator.hasNext()) {

                 Entry<Student, String> next = iterator.next();

                    System.out.println("个人信息"+next.getKey()+" "+next.getValue());

             }

        }

        System.out.println("遍历方式五");

        for (Map.Entry<HashMap<Student, String>, String> entry : hm.entrySet()) {

            System.out.println(entry.getValue()+"有以下学生");

            for (Map.Entry<Student,String> stu : entry.getKey().entrySet()) {

                System.out.println("个人信息"+stu.getKey()+" "+stu.getValue());

            }

        }

        System.out.println("遍历方式六");

        hm.forEach((K,V)->{

            System.out.println(V+"有以下学生");

            K.forEach((sub_K,sub_V)->{

                System.out.println("个人信息"+sub_K+" "+sub_V);

            });

        });

        Iterator<HashMap<Student, String>> ite2 = hm.keySet().iterator();

        while(ite2.hasNext()) {

            HashMap<Student,String> next = ite2.next();

            Iterator<Entry<Student, String>> iterator = next.entrySet().iterator();

            while(iterator.hasNext()) {

                Entry<Student, String> entry = iterator.next();

                if(entry.getValue().equals("深圳")) {

                    iterator.remove();

                }

            }

        }

        System.out.println("-=-----------------------");

        hm.forEach((K,V)->{

            System.out.println(V+"有以下学生");

            K.forEach((sub_K,sub_V)->{

                System.out.println("个人信息"+sub_K+" "+sub_V);

            });

        });

    }

}